M119A3 Digitized 105mm Towed Howitzer w/
Retrofit Operator New Equipment Training
Course
Operator New Equipment Training Course
Student Handout
Jan 2016
Improved M119A3 w/ Retrofit Operator Course
Lesson
Description/Class
1.
Familiarization and Operations of the M119A3 w/Retrofit
2.
Muzzle Velocity Frequency Entry
3.
Muzzle Velocity Variation
4.
Equivalent Full Charge
5.
Stored Targets
6.
Prefire Checklist
7.
Student Course Critique
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
Lesson Plan # 1
Retrofit Familiarization and Operations
The Improved M119A3 105mm Digitized Howitzer w/ Retrofit is an
upgrade to the M119A3 howitzer which enhances its operational
maintainability, capability and performance.
For Official Use Only
1
Improved M119A3 w/ Retrofit Operator Course
Terminal Learning Objective
ACTION: Operate the M119A3 105mm Digitized Howitzer w/ Retrofit
Improvements.
CONDITION: Given a fully operational M119A3 105mm Digitized Howitzer,
TM 9-1015-260-10 and Student Handout, in a classroom or field
environment.
STANDARD: Operate the M119A3 105mm Digitized Howitzer w/ Retrofit using the
Digital Fire Control IAW Operator TM and Student Handout.
For Official Use Only
2
Improved M119A3 w/ Retrofit Operator Course
Safety Requirements
Observe all Warnings, Cautions and Notes within TM 9-1015-260-10 and
Student Handout.
For Official Use Only
3
Improved M119A3 w/ Retrofit Operator Course
1. Learning Step/Activity 1: Identify characteristics of
the M119A3 w/ Retrofit.
a. Theory of Operations
The M119A3 Howitzer is a 105mm Light Weight Towed artillery howitzer retrofit is
designed to extend the life of the existing howitzer by accomplishing the following:
•
Permits fixed recoil lengths which simplifies the design
•
Reduces complexity of the M119A3 recoil mechanism
•
Increases the life of recoiling components by reducing wear within the system
•
Reduced shock loads
•
Updated software
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
2. Learning Step/Activity 2: Identify components of the
M119A3 w/ Retrofit.
a. Theory of Operations - Continued
Improved Fixed Recoil
Updated Software
Rerouted Brake
Lines
Improved Titanium Firing
Platform
Improved Struts
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
1. Learning Step/Activity 1: Identify characteristics of the
M119A3 w/ Retrofit.
b. Retrofit Equipment Data
Major Retrofit component weights:
Suspension Lockout assembly
27 lbs
Rod
10 lbs
Shoe
6 lbs
Bracket
1 lb
Retaining Pin (one set)
1 lb
Fixed Recoil Housing
3 lbs
Improved Titanium Firing Platform
195 lbs
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
1. Learning Step/Activity 1: Identify characteristics of
the M119A3 w/ Retrofit.
b. Retrofit Equipment Data - Continued
Recoil Lengths for US Army Charges
Charge 8
21-25”
Charge 7
19-24”
Charge 6
18-22”
Charge 5
15-21”
Charge 4
13-20”
Charge 3
11-19”
Charge 2
7-18”
Charge 1
7-16”
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
2. Learning Step/Activity 2: Identify components of the
M119A3 w/ Retrofit.
c. Retrofit Equipment
This Retrofit was developed in response to a need to increase the howitzer reliability
and stability when firing combat emergency situations (firing top- zone propelling
charge 8 above 800 mils QE). Fixed Recoil minimizes moving parts of the howitzer
allows longer cannon recoil at higher elevations, minimizing stress on the howitzer.
The Retrofit hardware components interface with the Titanium Firing Platform (base
plate) to optimize the cannon and suspension recoil motion reducing the overall
carriage loads when firing the howitzer. The Titanium Firing Platform increases the life
of the base plate.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
2. Learning Step/Activity 2: Identify components of the
M119A3 w/ Retrofit.
d. Retrofit Equipment - Continued
Suspension Lock out System (SLOS): The SLOS strut includes components in one
set for the right side and one set for the left side of the howitzer. The Strut Bracket
replaces legacy hardware on both the left and right sides of the howitzer including, but
not limited to the following legacy lower-carriage components: 2 each suspension
brackets, 2 each nonmetallic bumpers, and associated mounting hardware. Brake
lines have been rerouted to allow for better access to Struts.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
2. Learning Step/Activity 2: Identify components of the
M119A3 w/ Retrofit.
d. Retrofit Equipment - Continued
SLOS Strut
Cap
Rod
NOTE
SLOS retaining pin must be
rotated in order to release
pin from pin spring clip.
Bump Stop
(not shown)
Bracket
Break line
Retaining Pin
Pin Spring Clip
Shoe
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
2. Learning Step/Activity 2: Identify components of the
M119A3 w/ Retrofit.
d. Retrofit Equipment - Continued
NOTE
The SLOS Strut Shoes are permitted to interface during firing with both the
legacy Firing Platform and the Improved Titanium Firing Platform, but firing
platform durability is much better with the Improved Titanium Firing Platform.
1) Right side hardware set: 1 each Bracket (fits right side of howitzer),1
each Rod, 1 each Shoe, 1 each Retaining Pin.
2) Left side hardware set: Components on left side set are identical
(interchangeable) to the right side set shown above with the exception
of the bracket that fits the left side of the howitzer.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
2. Learning Step/Activity 2: Identify components of the
M119A3 w/ Retrofit.
d. Retrofit Equipment – Continued
Fixed Recoil
WARNING
Both the Retrofit Struts and Fixed Recoil must be fully installed for firing; otherwise, damage to
the cannon or injury to personnel may result due to longer recoil distances when using the
Fixed Recoil.
The Fixed Recoil components interface with the Buffer Recoil Mechanism including the Fixed Recoil
Housing and Bevel Gear Block Off Plate. The cut-off gear assembly and the variable cannon recoil
linkage attached to the cradle assembly are no longer needed on the howitzer with the installation of
the Fixed Recoil.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
2. Learning Step/Activity 2: Identify components of the
M119A3 w/ Retrofit.
d. Retrofit Equipment – Continued
Improved Replenisher
Bleeder Valve
Indicator Rod
Indicator Cover
NOTE
Replinisher contains 1 qt of Silicon brake fluid MIL-PRF 46176 for lubrication
that is to be replaced on an annual basis or added per PMCS.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
2. Learning Step/Activity 2: Identify components of the
M119A3 w/ Retrofit.
d. Retrofit Equipment – Continued
New Rear Cover
New 2 pc. Head
New Front Cap
Improved Recuperator
•
The existing recuperator is modified by removing the majority of components.
•
Nitrogen pressure reduced to 300 psi + or – 25 psi.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
2. Learning Step/Activity 2: Identify components of the
M119A3 w/ Retrofit.
d. Retrofit Equipment – Continued
Improved Buffer: The modified buffer consists of the legacy M119 buffer however the
front head is converted into a two piece head allowing for misalignment within the system.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
2. Learning Step/Activity 2: Identify components of the
M119A3 w/ Retrofit.
d. Retrofit Equipment – Continued
Improved Titanium Firing Platform: The Improved Titanium Firing Platform replaces
the legacy Firing Platform based on attrition.
NOTE
The Improved Firing Platform is permitted to be used during firing without the SLOS Struts
installed, but the durability of lower-carriage components is much better with installation of
both the SLOS Struts and Improved Firing Platform, especially when firing combat
emergency situations (zone 8 propelling charges at high quadrant elevations).
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
3. Learning Step/Activity 3: Perform Preventative Maintenance
Checks and Services on the M119A3 w/ Retrofit.
a. Before Operator Checks
NOTE
Prior to performing the Retrofit PMCS the current TM Before Operator
Checks PMCS must be performed.
1. Check Replinisher for proper fluid level. (See Operation Instructions) If
fluid is low notify maintenance.
2. Check recoil indicator slider assembly; ensure a slight drag exists. If not
notify maintenance.
3. Ensure firing platform is properly secured on trail assembly. Check platform
for damage (ie cracks). Check firing stays for kinks, fraying, or rust. If any
of these conditions exist notify maintenance.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
3. Learning Step/Activity 3: Perform Preventative Maintenance
Checks and Services on the M119A3 w/ Retrofit.
a. Before Operator Checks - Continued
4. Check that anchor block of front firing stays turns freely to provide
adjustment. Notify maintenance if stays cannot be adjusted.
5. Check Lunette for visible cracks. Notify maintenance if lunette has
visible cracks.
6. Check for loose or missing Retrofit hardware. Notify maintenance if
missing or damaged hardware:
a) SLOS
b) Replinisher
c) Recuperator
d) Buffer
e) Titanium Firing Platform
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
3. Learning Step/Activity 3: Perform Preventative Maintenance
Checks and Services on the M119A3 w/ Retrofit.
b. During Operator Checks
NOTE
Prior to performing the Retrofit During PMCS the current TM During
Operator PMCS but be performed.
1. Observe operation of recoil mechanism. Watch for jerking or slamming;
recoil lengths need to be IAW Table 1 Recoil Lengths for U.S. Charges.
2. Ensure SLOS Struts and shoes are no more than 1 inch above firing
platform during firing. If the closest shoe is more than one inch from the
firing platform, operator must adjust accordingly.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
3. Learning Step/Activity 3: Perform Preventative Maintenance
Checks and Services on the M119A3 w/ Retrofit.
c. After Operator Checks
NOTE
Prior to performing the Retrofit After PMCS the current TM After Operator PMCS
but be performed.
1. Check for damage, corrosion or missing parts (ie. SLOS Retaining Pins,
Rods, Shoes and Brackets). Check that the SLOS is functional if not notify
maintenance.
2. Ensure firing platform is properly secured on trail assembly. Check platform
for damage (ie cracks). Check firing stays for kinks, fraying, or rust. If any of
these conditions exist notify maintenance.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
4. Learning Step/Activity 4: Maintain the M119A3 w/ Retrofit.
a. Replenisher Brake Fluid Check
1) Open Indicator Cover on Replenisher.
2) Remove Indicator Rod from Replenisher Indicator Rod stowage.
3) Insert Indicator Rod into Indicator opening
4) Ensure Indicator Rod measures FULL mark if not NOTIFY maintenance.
5) Pull Indicator Rod from Indicator opening.
6) Stow Indicator Rod.
7) Close Indicator Cover.
Indicator Rod
Indicator Cover
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
5. Learning Step/Activity 5: Operate the M119A3 w/ Retrofit
a. Operation Procedures
CAUTION
When folding howitzer for a move the SLOS retaining pin must be
removed from the right side (AG Side). Failure to comply will cause
damage to equipment.
NOTE
Suspension Lock-out System (SLOS) must be in the stowed position (rods
must be in the uppermost storage position with retaining pin secured in
top hole).
NOTE
When performing emplacements the Suspension Lock-out System (SLOS)
will be added to the in-order procedures under Pre-fire Checks. Personnel
must emplace the SLOS before firing howitzer.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
5. Learning Step/Activity 5: Operate the M119A3 w/ Retrofit
a. Operation Procedures - Continued
NOTE
Ensure SLOS is engaged during Pre-fire Checks, with retaining pins
(one retaining Pin secured for the rod on each side of bracket) engaged
with equal number of grooves from top to bottom.
NOTE
During Fire Control Alignment Test (FCAT) procedures for leveling of
trunnions the Suspension Lock-out System (SLOS) left/right brackets
may be used as points to level Howitzer when performing the FCAT.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
5. Learning Step/Activity 5: Operate the M119A3 w/ Retrofit.
b. Cannoneer Duties
Assistant Gunner (AG) and Cannoneer #1 will engage/disengage the Suspension Lockout System (SLOS) during emplacements/displacements.
Assistant Gunner (AG) on the right and Cannoneer #1 on the left will:
1) Engage
a) Pull SLOS Retaining Pin, while securely holding the SLOS Cap, from Rod/bracket
groove releasing the SLOS Rod.
NOTE
When securing retaining pin, ensure retaining pin is secured in the latched
position.
b) Engage SLOS in the firing position by installing SLOS Retaining Pin through bracket
and rod groove aligning rods in brackets evenly by amount of grooves left/right top to
bottom to no more than 1 inch of clearance between the firing platform and the lowest
Strut.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
5. Learning Step/Activity 5: Operate the M119A3 w/ Retrofit.
b. Cannoneer Duties - Continued
2) Disengage
CAUTION
Howitzer must be in center of traverse and in travel lock position prior to
placing the SLOS in the stowed position. Failure to comply may cause damage to
equipment. Ensure SLOS’s Retaining Pins are installed in the left and right
brackets with rods in the most upward position for travel configuration.
NOTE
SLOS retaining pin must be rotated in order to release pin from pin spring clip.
a) Disengage SLOS rod while securely holding SLOS Cap and remove the SLOS
Retaining Pin.
b) Secure SLOS Rod in upper position with Rod’s SLOS Retaining Pin that prevents the
SLOS Shoes from separating from SLOS Rod during travel.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
5. Learning Step/Activity 5: Operate the M119A3 w/ Retrofit.
b. Cannoneer Duties - Continued
Engaged
Disengaged
SLOS Cap
Retaining Pin
in top slot
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
5. Learning Step/Activity 5: Operate the M119A3 w/ Retrofit.
c. Digital Fire Control Block 2 Version 2.0.2
NOTE
To maintain M119A3 DFC fire mission capability AFATDS software
version 6.8.0.1 or later must be installed before installation of DFC
Block 2 Version 2.0.2. M119A3 DFC software Block 2 Version 2.0.2 is
only certified to operate with version 6.8.0.1 of AFATDS software.
The DFC software update can be identified by the text “ver 2.0.2” in
the upper left hand corner of the DFCS Status screen. Notify Unit
Maintenance if the software version release is not updated.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
5. Learning Step/Activity 5: Operate the M119A3 w/ Retrofit.
c. Digital Fire Control Block 2 Version 2.0.2 Continued
The SW Version 2.0.2 provides the same functionality as the previous
version of DFC Systems, in addition to addressing the following issues:
1. Corrects a defect regarding an operator alert of a Fire Control Computer
and an Inertial Navigation Unit mismatch.
2. Provides on-board ballistics computation, global positioning, digital
communications, navigation processing, mission command functions,
and cannon pointing and aiming. The software generates information
used to make safety critical decisions.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
5. Learning Step/Activity 5: Operate the M119A3 w/ Retrofit.
d. New Pre Fire Checklist
NOTE
This Pre Fire Checklist is only valid with the RETROFIT SLOS and Fixed
Recoil Kits in conjunction with WP 0061.
Removed
1. The OHT (Hydraulic Fluid, Petroleum Base) level shown on the recuperator
floating piston should be between “FULL” and “DANGER LOW” marks,
approximately 1/4 inch below “FULL” mark. If not, notify field maintenance.
2.
Check stuffing box and inspect location of snap ring by removing either view plug. Snap
ring is required to be between, but not on, scribe marks. If not, notify field maintenance.
Install plug back into stuffing box and hand tighten.
3.
Check that jacking back nut is within one thread of the reservoir.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
5. Learning Step/Activity 5: Operate the M119A3 w/ Retrofit.
d. New Pre Fire Checklist - Cont
Added
1. Check Replinisher for proper fluid level. If fluid is low notify maintenance.
2. Ensue SLOS is Engaged with retaining pins (one retaining Pin secured for the
rod on each side of bracket) engaged with equal number of grooves from top to
bottom and not more than one inch clearance between firing platform and the
lowest SLOS Strut Shoe.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
5. Learning Step/Activity 5: Operate the M119A3 w/ Retrofit.
d. New Pre Fire Checklist - Cont
Current
3) Check cannon tube for obstructions, damage, or presence of foreign objects.
4) Ensure breech block moves easily and closes completely, firing mechanism functions
properly, and firing pin is serviceable. Place breech safety lever in FIRE position.
Place firing mechanism safety knob in the SAFE position (WP 0060).
5) Check that locking key and cotter pin on muzzle brake are present.
6) Ensure that trail is not in contact with ground or other obstructions.
7) Check tension and ensure firing stays are attached and tight.
For Official Use Only
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Improved M119A3 w/ Retrofit Operator Course
Check On Learning
1. What is the maximum distance away from the firing platform the
SLOS shoes can be set?
a. 1 inch
b. 6 inches
c. 5 inches
d. 10 inches
Answer: a
2. The SLOS struts do not have to be set equally.
a. True
b. False
Answer: b False
3. When folding the M119A3 w/ Retrofit the right SLOS Retaining
Pin can be left in place.
a. True
b. False
Answer: b False
For Official Use Only
32
Improved M119A3 w/ Retrofit Operator Course
Terminal Learning Objective
ACTION: Operate the M119A3 105mm Digitized Howitzer w/ Retrofit
Improvements.
CONDITION: Given a fully operational M119A3 105mm Digitized Howitzer,
TM 9-1015-260-10 and Student Handout, in a classroom or field
environment.
STANDARD: Operate the M119A3 105mm Digitized Howitzer w/ Retrofit using the
Digital Fire Control IAW Operator TM and Student Handout.
For Official Use Only
33
Improved M119A3 w/ Retrofit Operator Course
Summary
• Characteristics
• Components
• PMCS
• Operations
For Official Use Only
34
Improved M119A3 w/ Retrofit Operator Course
Are there any Questions?
For Official Use Only
35
Muzzle Velocity Frequency Entry (MVFE)
Lesson Plan # 2
The purpose of this lesson is to familiarize you with the procedures for Muzzle
Velocity Frequency Entry the digital fire control on the M119A3 Digital howitzer.
It will be your responsibility as a section to become proficient with your assigned
task.
IAW WP 0011
For Official Use Only
1
Muzzle Velocity Frequency Entry (MVFE)
Terminal Learning Objective
ACTION: Understand and explain the procedures involved with Muzzle
Velocity Frequency Entry using the Digital Fire Control.
CONDITION: Given a fully operational M119A3 105mm Digitized Howitzer,
TM 9-1015-260-10 and Student Handout, in a classroom or field
environment.
STANDARD: Demonstrate an understanding of Muzzle Velocity Frequency Entry
using the Digital Fire Control IAW Operator TM and Student Handout.
For Official Use Only
2
Muzzle Velocity Frequency Entry (MVFE)
Safety Requirements
Observe all Warnings, Cautions and Notes within TM 9-1015-260-10 and
Student Handout.
For Official Use Only
3
Muzzle Velocity Frequency Entry (MVFE)
Enabling Learning Objective A
ACTION: Identify and explain the duties and tasks relating to Muzzle Velocity
Frequency Entry using the Digital Fire Control.
CONDITION: Given a fully operational M119A3 105mm Digitized Howitzer,
TM 9-1015-260-10 and Student Handout, in a classroom or field
environment.
STANDARD: Demonstrate an understanding of Muzzle Velocity Frequency Entry
using the Digital Fire Control IAW Operator TM and Student Handout.
For Official Use Only
4
Muzzle Velocity Frequency Entry (MVFE)
a. Muzzle Velocity Frequency Entry
NOTE
Once the frequency has been added, the frequency is permanently
stored until the operator makes additional changes to the frequency
entry under Maintenance Mode.
1)
Cursor selection box around MVS FREQUENCY ENTRY on the
Maintenance screen.
2)
Press SELECT. Screen transitions to MVS Frequency Entry screen.
For Official Use Only
5
Muzzle Velocity Frequency Entry (MVFE)
NOTE
Under NORMAL Operations, the selection box will be visible on this screen.
3)
To edit the FREQUENCY field, press SELECT.
For Official Use Only
6
Muzzle Velocity Frequency Entry (MVFE)
4)
The FREQUENCY field becomes editable.
5)
Operator enters MVS FREQUENCY between 1 and 13, and then presses
ENT on numerical keypad. After ENT, the field is no longer editable.
For Official Use Only
7
Muzzle Velocity Frequency Entry (MVFE)
6) Operator presses USE ALL. Screen transitions to Maintenance Menu Screen.
For Official Use Only
8
Muzzle Velocity Frequency Entry (MVFE)
For Official Use Only
9
Muzzle Velocity Frequency Entry (MVFE)
Terminal Learning Objective
ACTION: Understand and explain the procedures involved with Muzzle
Velocity Frequency Entry using the Digital Fire Control.
CONDITION: Given a fully operational M119A3 105mm Digitized Howitzer,
TM 9-1015-260-10 and Student Handout, in a classroom or field
environment.
STANDARD:
Demonstrate an understanding of Muzzle Velocity Frequency Entry
using the Digital Fire Control IAW Operator TM and Student Handout.
For Official Use Only
10
Muzzle Velocity Frequency Entry (MVFE)
Summary
Muzzle Velocity Frequency Entry
For Official Use Only
11
Muzzle Velocity Frequency Entry (MVFE)
Are there any Questions?
For Official Use Only
12
Muzzle Velocity Variation (MVV)
Lesson Plan # 3
The purpose of this lesson is to familiarize you with the procedures for Muzzle
Velocity Variation (MVV) using the digital fire control on the M119A3 Digital
Howitzer. It will be your responsibility as a section to become proficient with
your assigned task.
IAW WP 0014
For Official Use Only
1
Muzzle Velocity Variation (MVV)
Terminal Learning Objective
ACTION: Understand and explain the procedures involved with Muzzle
Velocity Variation (MVV) using the Digital Fire Control.
CONDITION: Given a fully operational M119A3 105mm Digitized Howitzer,
TM 9-1015-260-10 and Student Handout, in a classroom or field
environment.
STANDARD: Demonstrate an understanding of Muzzle Velocity Variation (MVV)
using the Digital Fire Control IAW Operator TM and Student Handout.
For Official Use Only
2
Muzzle Velocity Variation (MVV)
Safety Requirements
Observe all Warnings, Cautions and Notes within TM 9-1015-260-10 and
Student Handout.
For Official Use Only
3
Muzzle Velocity Variation (MVV)
Enabling Learning Objective A
ACTION: Identify and explain the duties and tasks relating to Muzzle Velocity
Variation (MVV) using the Digital Fire Control.
CONDITION: Given a fully operational M119A3 105mm Digitized Howitzer,
TM 9-1015-260-10 and Student Handout, in a classroom or field
environment. .
STANDARD: Demonstrate an understanding of Muzzle Velocity Variation (MVV)
using the Digital Fire Control IAW Operator TM and Student Handout.
For Official Use Only
4
Muzzle Velocity Variation (MVV)
1. Learning Step/Activity 1: Identify Muzzle Velocity Variation Lot
a. Muzzle Velocity Variation (MVV)-Lot
1)
Cursor over to MUZZLE VELOCITY. Press SELECT.
2)
Screen transitions to Muzzle Velocity Variation screen.
For Official Use Only
5
Muzzle Velocity Variation (MVV)
1. Learning Step/Activity 1: Identify Muzzle Velocity Variation Lot Cont.
a. Muzzle Velocity Variation (MVV)-Lot Cont.
3) Press SELECT. Screen transitions to MVV Lot Database
Management screen.
For Official Use Only
6
Muzzle Velocity Variation (MVV)
1. Learning Step/Activity 1: Identify Muzzle Velocity Variation Lot Cont.
a. Muzzle Velocity Variation (MVV)-Lot Cont.
NOTE
This screen allows for different sorting options of the MVV Lots.
4)
Press SELECT. Screen transitions to MVV Lot screen.
For Official Use Only
7
Muzzle Velocity Variation (MVV)
1. Learning Step/Activity 1: Identify Muzzle Velocity Variation Lot Cont.
a. Muzzle Velocity Variation (MVV)-Lot Cont.
NOTE
Calculation of MVV wear will not be shown on FCC until 6 different LOTS of
ammunition have been fired.
5)
When no MVV lots are stored, this screen will be displayed. Press
CANCEL to return to the MVV Lot Database Management screen.
For Official Use Only
8
Muzzle Velocity Variation (MVV)
1. Learning Step/Activity 1: Identify Muzzle Velocity Variation Lot Cont.
a. Muzzle Velocity Variation (MVV)-Lot Cont.
6)
MVV lots are stored after a valid reading is detected, or received from the
Fire Direction Center (FDC).
7)
Press SELECT. Screen transitions to MVV Lot screen.
For Official Use Only
9
Muzzle Velocity Variation (MVV)
1. Learning Step/Activity 1: Identify Muzzle Velocity Variation Lot Cont.
a. Muzzle Velocity Variation (MVV)-Lot Cont.
8)
For additional MVV data, cursor to the desired MVV lot and press
SELECT. Screen will transition to MVV Lot Detailed screen.
For Official Use Only
10
Muzzle Velocity Variation (MVV)
1. Learning Step/Activity 1: Identify Muzzle Velocity Variation Lot Cont.
a. Muzzle Velocity Variation (MVV)-Lot Cont.
9)
This screen displays the Date Time Group, Country Code, Model,
Charge, Extended Lot and MVV Lot. Press CANCEL until operator returns
to Muzzle Velocity Variation screen.
For Official Use Only
11
Muzzle Velocity Variation (MVV)
2. Learning Step/Activity 2: Identify Muzzle Velocity Variation-Wear
a. Muzzle Velocity Variation (MVV)-Wear
1)
Cursor to MVV Wear and press SELECT. Screen transitions to MVV
Wear screen.
For Official Use Only
12
Muzzle Velocity Variation (MVV)
2. Learning Step/Activity 2: Identify Muzzle Velocity Variation-Wear
Cont.
a. Muzzle Velocity Variation (MVV)-Wear Cont.
NOTE
MVV Wear initially starts at zero (0) and is calculated and continuously
updated after a sufficient number of lots and rounds are fired.
2)
Press SELECT to edit the desired projectile family’s MVV wear.
For Official Use Only
13
Muzzle Velocity Variation (MVV)
2. Learning Step/Activity 2: Identify Muzzle Velocity Variation-Wear
Cont.
a. Muzzle Velocity Variation (MVV)-Wear Cont.
3)
Enter a value between -49.9 and +49.9. To change from positive to
Negative, press F2 Soft key. In the above example 1.1 is used. Press ENY.
For Official Use Only
14
Muzzle Velocity Variation (MVV)
2. Learning Step/Activity 2: Identify Muzzle Velocity Variation-Wear
Cont.
a. Muzzle Velocity Variation (MVV)-Wear Cont.
4)
Press USE ALL to store values. Screen transitions to Muzzle
Velocity Variation screen.
For Official Use Only
15
Muzzle Velocity Variation (MVV)
Are there any Questions?
For Official Use Only
16
Muzzle Velocity Variation (MVV)
Terminal Learning Objective
ACTION: Understand and explain the procedures involved with Muzzle
Velocity Variation (MVV) using the Digital Fire Control.
CONDITION: Given a fully operational M119A3 105mm Digitized Howitzer,
TM 9-1015-260-10 and Student Handout, in a classroom or field
environment.
STANDARD: Demonstrate an understanding of Muzzle Velocity Variation (MVV)
using the Digital Fire Control IAW Operator TM and Student Handout.
For Official Use Only
17
Muzzle Velocity Variation (MVV)
Summary
Muzzle Velocity Variation (MVV)-Lot
Muzzle Velocity Variation (MVV)-Wear
For Official Use Only
18
Muzzle Velocity Variation (MVV)
Are there any Questions?
For Official Use Only
19
Equivalent Full Charge (EFC)
Lesson Plan # 4
The purpose of this lesson is to familiarize you with the procedures for
Equivalent Full Charge (EFC) using the digital fire control on the M119A3
Digital Howitzer. It will be your responsibility as a section to become proficient
with your assigned task.
IAW WP 0013
For Official Use Only
1
Equivalent Full Charge (EFC)
Terminal Learning Objective
ACTION: Understand and explain the procedures involved with Equivalent
Full Charge (EFC) Test using the Digital Fire Control.
CONDITION: Given a fully operational M119A3 105mm Digitized Howitzer,
TM 9-1015-260-10 and Student Handout, in a classroom or field
environment.
STANDARD: Demonstrate an understanding of Equivalent Full Charge (EFC) using
the Digital Fire Control IAW Operator TM and Student Handout.
For Official Use Only
2
Equivalent Full Charge (EFC)
Safety Requirements
Observe all Warnings, Cautions and Notes within TM 9-1015-260-10 and
Student Handout.
For Official Use Only
3
Equivalent Full Charge (EFC)
Enabling Learning Objective A
ACTION: Understand and explain the procedures involved with Equivalent
Full Charge (EFC) Test using the Digital Fire Control.
CONDITION: Given a fully operational M119A3 105mm Digitized Howitzer,
TM 9-1015-260-10 and Student Handout, in a classroom or field
environment.
STANDARD: Demonstrate an understanding of Equivalent Full Charge (EFC) using
the Digital Fire Control IAW Operator TM and Student Handout.
For Official Use Only
4
Equivalent Full Charge (EFC)
a. Equivalent Full Charge
NOTE
If Digital Fire Control (DFC) is inoperable or under voice commands, all rounds
fired must be entered manually into the Weapon Record Data Screen when DFC
is operational.
1) Use cursor keys to move the selection box around EFC and press SELECT. The
screen will transition to Equivalent Full Charge screen.
For Official Use Only
5
Equivalent Full Charge (EFC)
NOTE
When a new tube exists, a TUBE INITIALIZATION must be conducted in order to
reset the pre-existing values.
2) To initialize a tube, ensure the selection box is around INITIALIZE EFC and press
SELECT. The screen will transition to Tube Initialization screen.
For Official Use Only
6
Equivalent Full Charge (EFC)
3) Press CONTINUE to initialize a new tube
For Official Use Only
7
Equivalent Full Charge (EFC)
4) Operator alert INIT ARE YOU SURE appears. If the operator presses YES the
screen transitions to the EFC screen. If the operator presses NO, no further action
is taken.
For Official Use Only
8
Equivalent Full Charge (EFC)
5) Cursor over and place selection box around EROSION/FATIGUE EFC and press
SELECT. Screen transitions to Erosion/Fatigue screen.
For Official Use Only
9
Equivalent Full Charge (EFC)
6) Press CANCEL to exit this screen.
For Official Use Only
10
Equivalent Full Charge (EFC)
7) Cursor over and place the selection box around WEAPON RECORD DATA and
press SELECT. Screen transitions to Weapon Record Data screen.
For Official Use Only
11
Equivalent Full Charge (EFC)
8) Cursor selection box around the TOT RDS column for the desired charge. In the
above example, M67 charge 1 is used. Press SELECT to edit this field.
For Official Use Only
12
Equivalent Full Charge (EFC)
9) If no pullover exists skip this step.
10) If a pullover exists, refer to DA Form 2408-4 and enter the amount of rounds fired
before the pullover. Press ENT on numerical keypad.
For Official Use Only
13
Equivalent Full Charge (EFC)
11) The total rounds and Fatigue EFC’s will be updated on the screen. Press USE
ALL Screen transitions to EFC screen.
For Official Use Only
14
Equivalent Full Charge (EFC)
12) Cursor selection box over EROSION/FATIGUE EFC and press SELECT. Screen
transitions to Erosion/Fatigue EFC Screen.
For Official Use Only
15
Equivalent Full Charge (EFC)
NOTE
When rounds are entered into the TOT RDS field in the WEAPON RECORD
DATA Screen only the FATIGUE EFS’s and the FATIGUE EFC’S REMAINING are
affected.
13) Press CANCEL to exit this screen.
For Official Use Only
16
Equivalent Full Charge (EFC)
14) Cursor over and place the selection box around PULLOVER MEASUREMENT
and press SELECT. Screen transitions to the Pullover Measurement Screen.
For Official Use Only
17
Equivalent Full Charge (EFC)
15) Operator enters pullover measurement (if available, refer to DA Form 2408-4)
and presses ENT. If no pullover data exists, operator skips this step.
For Official Use Only
18
Equivalent Full Charge (EFC)
16) Operator prompt ACCEPT VALUE appears. In this example, 4.150 will be used as
the value. If the operator presses YES the screen transitions to EFC screen. If NO
is pressed, no further action is taken.
For Official Use Only
19
Equivalent Full Charge (EFC)
17) Cursor over and lace the selection box around EROSION/FATIGUE EFC and
press SELECT. Screen transitions to Erosion/Fatigue EFC screen.
For Official Use Only
20
Equivalent Full Charge (EFC)
NOTE
Only the EROSION EFC’s are affected after the pullover measurement is
entered.
18) Press CANCEL to exit this screen.
For Official Use Only
21
Equivalent Full Charge (EFC)
19) Cursor over and place the selection box around WEAPON RECORD DATA and
press SELECT. Screen transitions to the Weapon Record Data screen.
For Official Use Only
22
Equivalent Full Charge (EFC)
NOTE
After all data has been entered, the EROSION and FATIGUE EFC’s will update
automatically after firing.
20) If no pullover data exits, enter all rounds fired in the +/- column.
21) If a pullover exists, refer to DA Form 2408-4 and enter the amount of rounds fired
after the pullover. Push ENT on numerical keypad.
For Official Use Only
23
Equivalent Full Charge (EFC)
22) The total rounds, FATIGUE EFC’s and erosion EFC’s WILL BE UPDATED. Press
USE ALL.
For Official Use Only
24
Equivalent Full Charge (EFC)
23) Cursor over and place the selection box around EROSION/FATIGUE EFC and
press SELECT. Screen transitions to Erosion/Fatigue EFC screen.
For Official Use Only
25
Equivalent Full Charge (EFC)
NOTE
The EROSION EFC’s, FATIGUE EFC’s and FATIGUE EFC’s REMAINING are
affected after entering rounds fired in the +/- rounds in the Weapon Record
Date screen.
NOTE
24) Press CANCEL to exit screen.
For Official Use Only
26
Equivalent Full Charge (EFC)
Are there any Questions?
For Official Use Only
27
Equivalent Full Charge (EFC)
Terminal Learning Objective
ACTION: Understand and explain the procedures involved with Equivalent
Full Charge (EFC) Test using the Digital Fire Control.
CONDITION: Given a fully operational M119A3 105mm Digitized Howitzer,
TM 9-1015-260-10 and Student Handout, in a classroom or field
environment.
STANDARD: Demonstrate an understanding of Equivalent Full Charge (EFC) using
the Digital Fire Control IAW Operator TM and Student Handout.
For Official Use Only
28
Equivalent Full Charge (EFC)
Summary
Initialize EFC
Erosion / Fatigue EFC
Pullover Measurement
Weapon Record Data
For Official Use Only
29
Equivalent Full Charge (EFC)
Are there any Questions?
For Official Use Only
30
Stored Targets
Lesson Plan # 5
The purpose of this lesson is to familiarize you with the procedures for Stored
Targets using the digital fire control on the M119A3 Digital Howitzer. It will be
your responsibility as a section to become proficient with your assigned task..
IAW WP 0030
For Official Use Only
1
Stored Targets
Terminal Learning Objective
ACTION: Understand and explain the procedures involved with Stored
Targets using the Digital Fire Control..
CONDITION: Given a fully operational M119A3 105mm Digitized Howitzer,
TM 9-1015-260-10 and Student Handout, in a classroom or field
environment.
STANDARD:
Demonstrate an understanding of Stored Targets using the Digital
Fire Control IAW Operator TM and Student Handout.
For Official Use Only
2
Stored Targets
Safety Requirements
Observe all Warnings, Cautions and Notes within TM 9-1015-260-10 and
Student Handout.
For Official Use Only
3
Stored Targets
Enabling Learning Objective A
ACTION: Understand and explain the procedures involved with Stored
Targets using the Digital Fire Control..
CONDITION: Given a fully operational M119A3 105mm Digitized Howitzer,
TM 9-1015-260-10 and Student Handout, in a classroom or field
environment.
STANDARD:
Demonstrate an understanding of Stored Targets using the Digital
Fire Control IAW Operator TM and Student Guide.
For Official Use Only
4
Stored Targets
1) Press SELECT. Screen transitions to Stored target Summary screen.
For Official Use Only
5
Stored Targets
NOTE
When no targets are stored this screen will be displayed.
2) Press CANCEL. To return to the Operational Main Menu Page 2 screen.
For Official Use Only
6
Stored Targets
NOTE
When a FPF/PRI target is stored, updated, or declined, this alert will appear
and can appear on any screen. Target information will also be stored on the
Section In Order screen for FPF/PRI targets.
3) Press ACK to clear the operator alert.
For Official Use Only
7
Stored Targets
NOTE
When a non-FPF/PRI target is stored, updated, or deleted, this alert
appears and can appear on any screen.
4) Press ACK to clear the operator alert.
For Official Use Only
8
Stored Targets
5) Press SELECT. Screen transitions to Stored Target Summary screen.
For Official Use Only
9
Stored Targets
NOTE
Up to 14 non-FPF/PRI targets can be stored. One FPF/PRI target can be
stored.
6) This screen displays the target number, number of Rounds, Shell, Propellant, Fuze and
Method of Control. Targets that have not been viewed will appear with an asterisk next
to the target number.
7) Press SELECT. Screen transitions to Stored Target Mission Details screen.
For Official Use Only
10
Stored Targets
8) This screen displays all the mission information.
9) Press NEXT TGT to view the next stored target.
For Official Use Only
11
Stored Targets
10) Targets with multiple phases appears with the OTHER VLY soft key. The first
volley will be displayed, press OTHER VLY to view the second volley.
For Official Use Only
12
Stored Targets
11) Press CANCEL to return to the first volley. Press CANCEL to return to the
Stored Target Summary screen.
For Official Use Only
13
Stored Targets
NOTE
Asterisks will be removed after the targets are viewed.
For Official Use Only
14
Stored Targets
Are there any Questions?
For Official Use Only
15
Stored Targets
Terminal Learning Objective
ACTION: Understand and explain the procedures involved with Stored
Targets using the Digital Fire Control..
CONDITION: Given a fully operational M119A3 105mm Digitized Howitzer,
TM 9-1015-260-10 and Student Handout, in a classroom or field
environment.
.
STANDARD: Demonstrate an understanding of Stored Targets using the Digital
Fire Control IAW Operator TM and Student Handout.
For Official Use Only
16
Stored Targets
Summary
Stored Targets Summary
Stored Targets Mission Details
OTHER VLY Screen
For Official Use Only
17
Stored Targets
Are there any Questions?
For Official Use Only
18
NEW PRE FIRE CHECKS
NOTE
This Pre Fire Checklist is only valid with the RETROFIT SLOS and Fixed
Recoil Kits in conjunction with WP 0061.
Removed
1. The OHT (Hydraulic Fluid, Petroleum Base) level shown on the recuperator
floating piston should be between “FULL” and “DANGER LOW” marks,
approximately 1/4 inch below “FULL” mark. If not, notify field maintenance.
2. Check stuffing box (Figure 2, Item 2) and inspect location of snap ring (Figure 2,
Item 3) by removing either view plug (Figure 2, Item 1). Snap ring is required to
be between, but not on, scribe marks (Figure 2, Item 4). If not, notify field
maintenance. Install plug back into stuffing box and hand tighten.
3. Check that jacking back nut is within one thread of the reservoir.
Added
1. Check Replinisher for proper fluid level. If fluid is low notify maintenance.
2. Ensue SLOS is Engaged with retaining pins (one retaining Pin secured for the
rod on each side of bracket) engaged with equal number of grooves from top to
bottom and not more than one inch clearance between firing platform and the
lowest SLOS Strut Shoe.
Current
3. Check cannon tube for obstructions, damage, or presence of foreign objects.
4. Ensure breechblock moves easily and closes completely, firing mechanism
functions properly, and firing pin is serviceable. Place breech safety lever in FIRE
position. Place firing mechanism safety knob in the SAFE position (WP 0060).
5. Check that locking key and cotter pin on muzzle brake are present.
6. Ensure that trail is not in contact with ground or other obstructions.
7. Check tension and ensure firing stays are attached and tight.
M119A3 Operator New Equipment Training Course Evaluation
Student Name:
________________________________________________________
Unit:_________________________
_ Date:_________________
Course Title:
___________________________________________________________
Instructor(s):
___________________________________________________________
We want to provide you with the most effective training possible, now and in
future training sessions. Please take a moment to answer the following
questions. It’s through your feedback that we improve our instruction and better
serve your needs. Thank you!
Please tell us something about yourself.
Service
Active: ______ Reserve: ______ National Guard: ______ Civilian: ______
MOS/Job Series: _________________ Rank/Grade: ___________________
Note: Please circle the appropriate answer:
1. Did your unit provide you with any information about this course prior to
you attending?
Yes
No
2. When were you notified that you were selected to attend this training?
a.
b.
c.
d.
e.
The morning of training
1 to 6 days prior to start of training
1 to 2 weeks prior to start of training
2 weeks to 1 month prior to start of training
More than 1 month prior to start of training
3. The classroom was clean and organized:
Disagree
0
1
2
3
Neutral
4
5
6
7
Strongly Agree
8
9
10
4. All required training material and training aids were available for
conduct of training:
Disagree
0
1
2
3
Neutral
4
5
6
7
Strongly Agree
8
9
10
5. Lesson Objectives were explained prior to the conduct of each lesson:
Not Explained
0
1
2
3
Neutral
4
5
6
7
Fully Explained
8
9
10
6. Introduction, Administrative Information, and Overview of the topics
were explained at the beginning of each lesson:
Not Explained
0
1
2
3
Neutral
4
5
6
7
Fully Explained
8
9
10
7. The Instructor covered the safety requirements prior to each lesson:
Disagree
0
1
2
3
Neutral
4
5
6
7
Strongly Agree
8
9
10
8. You were provided with access to the proper safety equipment during
the course:
Disagree
0
1
2
3
Neutral
4
5
6
7
Strongly Agree
8
9
10
9. The amount of classroom time allocated for each lesson was adequate:
Disagree
0
1
2
3
Neutral
4
5
6
7
Strongly Agree
8
9
10
10. The amount of “Hands-On” training time allocated for each lesson was
adequate:
Disagree
0
1
2
3
Neutral
4
5
6
7
Strongly Agree
8
9
10
11. Training Materials: Instructor Guides, Student Guides, Presentations,
and Student Handouts were adequate for this course and can be used to
effectively sustain training at your unit:
Disagree
0
1
2
3
Neutral
4
5
6
7
Strongly Agree
8
9
10
12. Presentation materials used were appropriate and covered the topic
well:
Disagree
0
1
2
3
Neutral
4
5
6
7
Strongly Agree
8
9
10
13. Training aids, special tools, and test equipment utilized were adequate
to support the lesson objectives:
Disagree
0
1
2
3
Neutral
4
5
6
7
Strongly Agree
8
9
10
14. The Instructor adequately covered each topic and provided you with
essential information:
Disagree
0
1
2
3
Neutral
4
5
6
7
Strongly Agree
8
9
10
15. The Instructor was knowledgeable about the subject matter and able to
present the information well:
Disagree
0
1
2
3
Neutral
4
5
6
7
Strongly Agree
8
9
10
6
7
8
16. Your overall opinion of the course was:
Poor
0
1
2
3
Neutral
4
5
Excellent
9
10
17. What went well during this course?
18. What could we have done better?
Thank you for completing this critique. Your responses will help us make the
best possible training available for units receiving our equipment.