MECHANICAL
FABRICATION 1
HANDS-ON SKILLS FOR MODULE 2:
WRENCHES
ITEMS NEEDED FOR HANDS-ON SKILLS
Amatrol Supplied
1
950-MPF1 Mechanical Fabrication 1 Learning System
School Supplied
Safety glasses
FIRST EDITION, MODULE 2, REV. D
Amatrol, AMNET, CIMSOFT, MCL, MINI-CIM, IST, ITC, VEST, and Technovate are trademarks or registered trademarks of Amatrol, Inc. All other brand and
product names are trademarks or registered trademarks of their respective companies.
Copyright © 2019, 2015 by AMATROL, INC.
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Amatrol, Inc., 2400 Centennial Blvd., Jeffersonville, IN 47130 USA, Ph 812-288-8285, FAX 812-283-1584 www.amatrol.com
L19004-XA02UEN-E1 REV. D WRENCHES
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SKILL 1
INSPECT AND INSTALL A THREADED FASTENER
PROCEDURE OVERVIEW
In this skill, you will select and inspect threaded fasteners. They will then be used to assemble several parts.
1. Perform the following safety checkout. Make sure that you are able to answer yes to each item before proceeding.
YES/NO
SAFETY CHECKOUT
Wear safety glasses
Wear tight fitting clothes
Ties, watches, rings, and other jewelry are removed
Long hair is tied up or put in a cap or under a shirt
Wearing heavy duty shoes
Wear short sleeves or long sleeves are rolled up
Floor is dry
2. Review the following image of the Clamp Plate, Notched disk, and Fastening Disk assembly. Understanding that the
final assembly will help you during the assembly process.
CLAMP
PLATE
FASTENING
DISK
NOTCH
DISK
Figure 1-1.
Clamp Plate, Notched Disk, and Fastening Disk Assemblies
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SKILL 1 INSPECT AND INSTALL A THREADED FASTENER
3. Gather the parts to be assembled in the quantities shown.
Quantity
Part Number
4
M8×30HHCS
Part Name
8
M8FW
M8 Flat Washer
4
M8LW
M8 Lock Washer
4
M8HX
M8 Hex Nut
1
M12×30HHCS
1
M12FW
1
M12LW
M12 Lock Washer
1
15903
Clamp Plate
1
15905
Notched Disk
M8×30mm Hex Hd Cap Screw
M12×30mm Hex Hd Cap Screw
M12 Flat Washer
4. Inspect the fasteners for damage or debris.
Visually check the fasteners for damage. If the threads are damaged or there is debris in the threads, do not use the
fastener. Get a new one and give the damaged one to the instructor.
5. Perform the following substeps to assemble the Clamp Plate to the workplate.
A. Place an M8 flat washer over one of the M8  30mm hex head cap screws.
M8 X 30 MM
HEX HEAD CAP SCREW
M8 FLAT WASHER
Figure 1-2. M8 Flat Washer on the M8 x 30mm Hex Head Cap Screws
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SKILL 1 INSPECT AND INSTALL A THREADED FASTENER
B. Place the Clamp Plate over the holes in the workplate, as shown in figure 1-3.
CLAMP PLATE
WORK PLATE
Figure 1-3. Place Clamp over Mounting Holes on Workplace
C. From the underside of the workplate, insert the M8  30mm hex head cap screw with the washer through the
clearance hole in the workplate and the Clamp Plate, as shown in figure 1-4, and hold it.
CLAMP PLATE
Figure 1-4.
M8 HEX HEAD
CAP SCREW
Cap Screw through Clamp Plate Fastening Hole
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SKILL 1 INSPECT AND INSTALL A THREADED FASTENER
D. Place an M8 flat washer over the M8  30mm hex head cap screw threads showing through the hole in the Clamp
Plate, as shown in figure 1-5.
CLAMP PLATE
M8 HEX HEAD
CAP SCREW
M8 FLAT
WASHER
Figure 1-5.
Top View of the Fastener Threads with the Flat Washer Installed
E. Place an M8 lock washer on the M8  30mm hex head cap screw, as shown in figure 1-6.
CLAMP PLATE
M8 HEX HEAD
CAP SCREW
LOCK
WASHER
M8 FLAT
WASHER
Figure 1-6.
Add a Lock Washer to the Fastener Stack-Up
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SKILL 1 INSPECT AND INSTALL A THREADED FASTENER
F. Hand start an M8 hex nut on the M8  30mm hex head cap screw by aligning the threads and turning the fastener
clockwise, as shown in figure 1-7.
CLAMP PLATE
M8 HEX NUT
LOCK WASHER
FLAT WASHER
Figure 1-7.
Add the M8 Hex Nut to the Fastener Stack-Up
G. Hand tighten the nut on the hex head cap screw until the nut contacts the lock washer, as shown in figure 1-8. Once
contact is made with the lock washer, hand tightening will become difficult.
The fastener is now installed and ready for the finish tightening process.
Figure 1-8.
Complete Fastener Stack-Up Hand Tightened
H. Repeat substeps C through G for the second hole in the Clamp Plate.
That completes the hand assembly of the Clamp Plate to the workplate. Next you will assemble the Notched Disk
to the workplate.
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SKILL 1 INSPECT AND INSTALL A THREADED FASTENER
6. Perform the following substeps to assemble the Notched Disk to the workplate, as shown in figure 1-9.
Figure 1-9.
Completed Hand Tightened Notched Disk
A. Place the Notched Disk over the holes in the workplate, as shown in figure 1-10.
CLAMP
PLATE
NOTCHED
DISK
HOLES IN
WORKPLATE
Figure 1-10. Notched Disk Location
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SKILL 1 INSPECT AND INSTALL A THREADED FASTENER
B. Place an M8 flat washer on the M8  30mm hex head cap screw, as shown in figure 1-11.
M8 X 30 MM
HEX HEAD CAP SCREW
M8 FLAT WASHER
Figure 1-11. Fastener and Flat Washer
C. From the underside of the workplate, insert the M8  30mm hex head cap screw with the washer through the
clearance hole in the workplate and the Notched Disk, as shown in figure 1-12. and hold it.
NOTCHED
DISK
M8 X 30 HEX
CAP SCREW
Figure 1-12. Notched Disk and Fastener
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SKILL 1 INSPECT AND INSTALL A THREADED FASTENER
D. Place a flat washer, lock washer, and a nut on the hex head cap screw and hand tighten, as shown in figure 1-13.
M8 HEX NUT
LOCK
WASHER
FLAT
WASHER
Figure 1-13. Fastener Stack-Up
E. Repeat substeps B through D for the second slot in the Notched Disk, as shown in figure 1-14.
HAND TIGHT
Figure 1-14. Notched Disk and Fasteners
That completes the hand assembly of the Notched Disk to the workplate. Next you will assemble the Fastening Disk
to the Notched Disk.
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SKILL 1 INSPECT AND INSTALL A THREADED FASTENER
7. Perform the following substeps to assemble the Fastening Disk to the Notched Disk.
A. Place the Fastening Disk on top of the Notched Disk with the M12 clearance hole lined up with the threaded hole
in the center of the Notched Disk, as shown in figure 1-15.
FASTENING
DISK
M12 CLEARANCE
HOLE
Figure 1-15. Clearance Hole of the Fastening Disk Aligned with the Threaded Hole in
Notched Disk
B. Place an M12 split ring lock washer and an M12 flat washer on the M12 X 30mm hex head cap screw, as shown in
figure 1-16.
The cap screw will not be used with a nut, but instead will be screwed into the threaded hole in the Notched Disk
to secure the Fastening Disk.
M12 SPLIT RING LOCK WASHER
M12 FLAT WASHER
M12 X 30 MM
HEX HEAD
CAP SCREW
Figure 1-16. M8 Flat Washer on the M8  30mm Hex Head Cap Screws
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SKILL 1 INSPECT AND INSTALL A THREADED FASTENER
C. Insert the M12 hex head cap screw with flat and lock washer into the hole in the center of the fastening disk. Align
the threads and hand tighten the cap screw into the threaded hole of the Notched Disk, as shown in figure 1-17.
Figure 1-17. Hand Tightened Stack-Up for Securing the Fastening Disk to the Notched
Disk
D. Tighten the cap screw until the screw head bearing surface contacts the split ring lock washer and it becomes
difficult to turn.
This completes the hand tightening portion of the assembly process. The fastener is now installed and ready for
the finish tightening process.
Figure 1-18. Hand Tightened Stack-Up for Securing the Fastening Block to the Notched
Disk
NOTE
If time permits, keep the assembly intact for use in the next skill. If there is not enough time, disassemble the
assembly and return the parts to the proper storage bins.
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SKILL 2
USE A FIXED WRENCH TO TIGHTEN A THREADED FASTENER
PROCEDURE OVERVIEW
In this skill, you will be tightening several fasteners, using the box, open, and offset wrenches.
1. Perform the following safety checkout. Make sure that you are able to answer yes to each item before proceeding.
YES/NO
SAFETY CHECKOUT
Wear safety glasses
Wear tight fitting clothes
Ties, watches, rings, and other jewelry are removed
Long hair is tied up or put in a cap or under a shirt
Wearing heavy duty shoes
Wear short sleeves or long sleeves are rolled up
Floor is dry
2. Review the following image of the Clamp Plate, Notched Disk, and Fastening Disk assembly, as shown in figure 2-1.
Understanding that the final assembly will help you during the assembly process.
FASTENING
DISK
NOTCHED
DISK
CLAMP
PLATE
Figure 2-1.
Clamp Plate, Notched Disk, and Fastening Disk Assembly
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SKILL 2 USE A FIXED WRENCH TO TIGHTEN A THREADED FASTENER
3. If you are continuing from the previous skill, and the assembly is still in place, as shown in figure 2-2, proceed on
to step 4. If the assemblies are not in place, assemble the Clamp Plate, Notch Disk, and Fastening Disk with hand
tightening only. When complete, your assemblies should appear as shown in figure 2-2.
M12 LOOSELY
ASSEMBLED
M8 LOOSELY
ASSEMBLED
Figure 2-2.
M8 LOOSELY
ASSEMBLED
Assemblies from Skill 1
4. Perform the following substeps to tighten the Clamp Plate to the workplate.
A. Obtain the 13-mm offset and one of the 13-mm combination wrenches from the shadow board.
The offset wrench will be used to clear the obstruction on the Clamp Plate that makes the fasteners difficult to
tighten with other types of fixed wrenches.
13MM 12 POINT
OFFSET WRENCH
13MM COMBINATION
WRENCHES
Figure 2-3.
The 13-mm Offset and the 13-mm Combination Wrench
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SKILL 2 USE A FIXED WRENCH TO TIGHTEN A THREADED FASTENER
B. Place the box end of the 13-mm combination wrench on the head of one of the M8  30mm hex head cap screws
holding the Clamp Plate to the workplate from the underside of the workplate. This is the backup wrench.
COMBINATION
WRENCH
Figure 2-4.
The 13mm Box End Wrench Holding the M8  30mm Hex Head Cap Screw
C. Place the 13-mm end of the offset wrench on the M8 nut on the end of the same cap screw on the topside of the
workplate. This application is a good example of the need for an offset wrench because the lip of the clamp plate
would prevent the movement of other types of fixed wrenches.
OFFSET
WRENCH
LIP
Figure 2-5.
Offset Wrench in Use
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SKILL 2 USE A FIXED WRENCH TO TIGHTEN A THREADED FASTENER
D. Tighten the fastener by grasping the offset wrench handle furthest away from the fastener. Turn the offset wrench
clockwise toward your body while applying a counter holding force to the backup wrench. Continue tightening until
the split ring lock washer is fully compressed.
TIGHTEN
CLOCKWISE
Figure 2-6.
Tightened Clamp Plate Fastener
NOTE
If you reach the end of your arm travel or you encounter an obstruction, reposition the offset wrench by lifting it off
the nut and return it to the starting position.
Figure 2-7.
Repositioning Wrench
E. Repeat substeps B through D for the remaining Clamp Plate fastener.
F. Remove the wrenches from the fastener.
This completes the tightening of the Clamp Plate to workplace.
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SKILL 2 USE A FIXED WRENCH TO TIGHTEN A THREADED FASTENER
5. Perform the following substeps to tighten the Notched Disk to the workplate.
A. Obtain an additional 13-mm combination wrench from the shadow board.
B. Place the boxed end of one of the 13-mm combination wrenches on the head of one of the M8  30mm hex head
cap screws holding the Notched Disk to the workplate from the underside of the workplate. This is the backup
wrench.
UNDERSIDE
M8 HEX CAP
SCREW
Figure 2-8.
Backup Wrench on M8 Hex Cap Screw
C. On the topside of the workplate, place the 13-mm open end of the second combination wrench on the M8 nut of the
same cap screw on the Notched Disk. This is a good example of an application that needs the design of the open
wrench.
13 MM OPEN
END OF
COMBINATION
WRENCH
Figure 2-9.
Tightening Wrench
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SKILL 2 USE A FIXED WRENCH TO TIGHTEN A THREADED FASTENER
D. Tighten the fastener by grasping the top combination wrench handle furthest away from the fastener. Turn the top
combination wrench clockwise toward your body while applying a counter holding force to the back up wrench.
Continue tightening until the split ring lock washer is fully compressed, as shown in figure 2-10.
Figure 2-10. Fastener Tightened
NOTE
You may have to reposition the open end wrench. You can flip the wrench to fit on the fastener at a different angle
for better access.
*SEE NOTE
*SEE NOTE
Figure 2-11. Flipping the Wrench for Access to the Wrench Flats in Tight Areas
(*Fastening Disk Removed for Clarity Only)
E. Repeat substeps B through D for the remaining fastener.
F. Remove the wrenches from the fastener.
This completes the tightening of the Notched Disk to the workplate.
6. Disassemble the Clamp Plate assembly and return the parts to their proper storage areas.
7. If there is sufficient time remaining, leave the Notched Disk and Fastening Disk assembly in place and proceed to the
next objective and skill. If not, disassemble the Notched Disk and Fastening Disk assembly and return the parts to
their proper storage areas.
8. Return the wrenches to their locations on the shadow board.
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SKILL 3
USE AN ADJUSTABLE WRENCH TO TIGHTEN A THREADED FASTENER
PROCEDURE OVERVIEW
In this skill, you will tighten the fastener you loosely assembled in the previous skill. You will properly fit and adjust
the jaws of an adjustable wrench.
1. Perform the following safety checkout. Make sure that you are able to answer yes to each item before proceeding.
YES/NO
SAFETY CHECKOUT
Wear safety glasses
Wear tight fitting clothes
Ties, watches, rings, and other jewelry are removed
Long hair is tied up or put in a cap or under a shirt
Wearing heavy duty shoes
Wear short sleeves or long sleeves are rolled up
Floor is dry
2. Review the following image of the Notched Disk and Fastening Block assembly, figure 3-1. Understanding that the final
assembly will help you during the assembly process.
Figure 3-1.
Notched Disk and Fastening Block Assembly
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SKILL 3 USE AN ADJUSTABLE WRENCH TO TIGHTEN A THREADED FASTENER
3. If you are continuing from the previous skill, proceed directly to step 4. If not, set up the Notch Disk and Fastening Disk
as shown in figure 3-2. If you are unsure of the assembly procedures, review the previous skills.
M12 HEX HEAD
CAP SCREW LOOSE
M8 HEX HEAD
CAP SCREWS TIGHT
Figure 3-2.
Assembly
4. Obtain one adjustable wrench from the shadow board.
ADJUSTABLE
WRENCHES
Figure 3-3.
Adjustable Wrenches
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SKILL 3 USE AN ADJUSTABLE WRENCH TO TIGHTEN A THREADED FASTENER
5. Turn the worm gear to adjust the wrench opening greater than the width of the head of the M12  30mm hex head
cap screw.
WORM
Figure 3-4.
Adjustable Wrench Open
6. Place the adjustable wrench on the M12 hex head bolt head with the adjustable jaw toward the direction of pull, as
shown in figure 3-5.
FIXED JAW
AGAINST
WRENCH FLAT
GAP
Figure 3-5.
Open Adjustable Wrench
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SKILL 3 USE AN ADJUSTABLE WRENCH TO TIGHTEN A THREADED FASTENER
7. Turn the worm gear to adjust the wrench until its jaws securely grip the wrench flats of the bolt head.
TIGHT
Figure 3-6.
Close Adjustable Wrench
8. Firmly grasp the adjustable wrench handle furthest away from the fastener.
9. Turn the adjustable wrench clockwise toward your body. Continue tightening until the split ring lock washer is fully
compressed, as shown in figure 3-7.
LOCK WASHER
COMPRESSED
Figure 3-7.
Fastener Tightened
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SKILL 3 USE AN ADJUSTABLE WRENCH TO TIGHTEN A THREADED FASTENER
NOTE
You may have to reposition the adjustable wrench. You can flip the wrench to fit on the fastener at a different angle
for better access. Remember to retighten the adjustable wrench after each repositioning.
Figure 3-8.
Flipping Wrench for Access
10. Remove the wrenches from the fastener.
This completes the tightening of the Fastener Disk to the Notched Disk.
11. Disassemble the assembly and return the parts to their proper storage areas.
12. Return the wrenches to their locations on the shadow board.
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SKILL 4
USE AN ALLEN WRENCH TO TIGHTEN A THREADED FASTENER
PROCEDURE OVERVIEW
In this skill, you will be assembling and tightening several fasteners using the two Allen wrench types you have just
learned about.
1. Perform the following safety checkout. Make sure that you are able to answer yes to each item before proceeding.
YES/NO
SAFETY CHECKOUT
Wear safety glasses
Wear tight fitting clothes
Ties, watches, rings, and other jewelry are removed
Long hair is tied up or put in a cap or under a shirt
Wearing heavy duty shoes
Wear short sleeves or long sleeves are rolled up
Floor is dry
2. Review the following image of the Pneumatic Block, as shown in figure 4-1. Understanding that the final assembly will
help you during the assembly process.
Figure 4-1.
Pneumatic Block Assembly
3. Gather the parts in the quantities shown to be assembled.
Quantity
Part Number
Part Name
2
M8×35SHCS
M8×35mm socket hd cap screw
2
M8×55SHCS
M8×55mm socket hd cap screw
4
M8HX
M8 hex nut
4
M8LW
M8 lock washer
4
M8FW
M8 flat washer
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SKILL 4 USE AN ALLEN WRENCH TO TIGHTEN A THREADED FASTENER
4. Inspect the fasteners for damage. Also check for dirt or debris. If there is damage, do not use the fastener. Get a new
one and give the damaged one to the instructor.
DAMAGED
THREAD
Figure 4-2.
Inspect the Fasteners
5. Obtain the 6mm L-Allen wrench, the 6mm T-Allen wrench, and the 13mm combination wrench from the shadow board.
13MM COMBINATION
WRENCHES
6MM
L-ALLEN
WRENCH
6MM
R-ALLEN
WRENCH
Figure 4-3.
Skill 4 Tools
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SKILL 4 USE AN ALLEN WRENCH TO TIGHTEN A THREADED FASTENER
6. Perform the following substeps to assemble the Pneumatic Block to the workplate.
A. Place the Pneumatic Block over the holes in the workplate, as shown in figure 4-4. The pipe fitting hole in the block
should be on the right side.
SHALLOW COUNTERBORE HOLES
DEEP COUNTERBORED HOLES
Figure 4-4.
PIPE
FITTING
HOLE
Pneumatic Block Location on Work Place
B. Place the two M8 X 55mm socket head cap screws in the shallow counterbored holes in the Pneumatic Block, as
shown in figure 4-5.
M8 X 55 MM
SHALLOW
COUNTERBORED
HOLES
Figure 4-5.
Two M8 X 55mm Socket Head Cap Screws in the Shallow Holes in the
Pneumatic Block
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SKILL 4 USE AN ALLEN WRENCH TO TIGHTEN A THREADED FASTENER
C. Place the two M8 X 35mm socket head cap screws in the deep counterbored holes in the Pneumatic Block, as
shown in figure 4-6.
M8 X 35 MM
DEEP
COUNTERBORED
HOLES
Figure 4-6.
Two M8 X 35mm Socket Head Cap Screws in the Deep Counterbored
Holes in the Pneumatic Block
D. From the underside of the workplate, place an M8 flat washer, an M8 lock washer, and an M8 nut on all of the
socket head cap screws and hand tighten, as shown in figure 4-7.
FLAT WASHER
LOCK WASHER
HEX NUT
Figure 4-7.
Flat Washers, Lock Washers, and Nuts Securing the Pneumatic Block
(Underside View)
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SKILL 4 USE AN ALLEN WRENCH TO TIGHTEN A THREADED FASTENER
E. Place the short end of the 6mm L-Allen wrench in one of the M8 X 55mm socket head cap screws.
6-MM L-ALLEN
M8 X 55 SOCKET HEAD
CAP SCREW
Figure 4-8.
Using the L-Allen Wrench
F. From the underside of the workplate, place the boxed end of the 13-mm combination wrench on the M8 nut on the
same fastener as a backup wrench.
13-MM WRENCH
Figure 4-9.
Backup Wrench on M8 Hex Nut
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SKILL 4 USE AN ALLEN WRENCH TO TIGHTEN A THREADED FASTENER
G. Tighten the fastener by turning the 6-mm L-Allen wrench clockwise toward your body, while holding the nut with the
backup wrench. Continue to tighten until the split ring lock washer on the fastener is fully compress.
NOTE
While it is preferable to hold a fastener head and turn the nut during the tightening process, in this example the
Allen wrenches are being turned to demonstrate the different Allen wrench uses.
Figure 4-10. Using the L-Allen Wrench
NOTE
You may have to reposition the wrench to avoid obstacles.
H. Remove the wrench when the fastener is tightened snugly.
I. Repeat the tightening steps for the M8 X 55mm socket head cap screw in the other shallow counterbored hole.
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SKILL 4 USE AN ALLEN WRENCH TO TIGHTEN A THREADED FASTENER
J. Insert the short end of the 6-mm L-Allen wrench into one of the M8 X 35mm socket head cap screws. While the
short end of the L-Allen wrench will reach the screw head there is no room for your hand to turn the wrench, as
shown in figure 4-11.
K. Remove the L-Allen wrench and insert the 6-mm T-Allen wrench into the screw head.
NO HAND
CLEARANCE
Figure 4-11. L-Allen Wrench in Too Deep
L. From the underside of the workplate, place the boxed end of the 13-mm combination wrench on the M8 nut on the
same fastener as a backup wrench.
M. Tighten the fastener by turning the 6-mm T-Allen wrench clockwise while holding the nut with the backup wrench.
Continue to tighten until the split ring lock washer on the fastener is fully compressed.
6-MM
T-HANDLE
WRENCH
Figure 4-12. Using the T-Allen Wrench
N. Repeat substeps K through M for the remaining socket head cap screws.
O. Remove the wrench when complete.
That completes the tightening of the Pneumatic Block.
7. Disassemble and return the parts and tools to their proper storage.
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SKILL 5
USE A RATCHET WRENCH TO TIGHTEN A THREADED FASTENER
PROCEDURE OVERVIEW
In this skill, you will assemble and tighten several fasteners using a ratchet wrench and a socket like you have just
learned about.
1. Perform the following safety checkout. Make sure that you are able to answer yes to each item before proceeding.
YES/NO
SAFETY CHECKOUT
Wear safety glasses
Wear tight fitting clothes
Ties, watches, rings, and other jewelry are removed
Long hair is tied up or put in a cap or under a shirt
Wearing heavy duty shoes
Wear short sleeves or long sleeves are rolled up
Floor is dry
2. Review the following image of the Fastening Disk, as shown in figure 5-1. Understanding that the final assembly will
help you during the assembly process.
Figure 5-1.
Fastening Disk
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SKILL 5 USE A RATCHET WRENCH TO TIGHTEN A THREADED FASTENER
3. Gather the parts to be assembled in the quantities shown.
Quantity
Part Number
Part Name
4
M10 X 40HHCS
M10×40mm hex hd cap screw
4
M10HX
M10 hex nut
4
M10LW
M10 lock washer
8
M10FW
M10 flat washer
1
15905
Fastening Disk
4. Obtain the 17mm 3/8-inch drive Socket Wrench, the 3/8-inch Ratchet Wrench, and the 17-mm combination wrench
from the shadow board.
17-MM
COMBINATION
WRENCH
3/8-INCH
RATCHET
WRENCH
17-MM
DEEP SOCKET
Figure 5-2.
Wrenches
5. Inspect the fasteners for damage. Also, check for dirt or debris. If the threads are damaged or there is debris in the
threads, do not use the fastener, get a new one and give the damaged one to the instructor.
L19004-XA02UEN-E1-S05, REV. D WRENCHES
Copyright © 2019 Amatrol, Inc.
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SKILL 5 USE A RATCHET WRENCH TO TIGHTEN A THREADED FASTENER
6. Perform the following substeps to assemble the Fastening Disk to the workplate.
A. Place four M10 flat washers on the four M10 X 40mm hex head cap screws
B. Place the Fastening Disk so that its holes are aligned with the holes in the workplate, as shown in figure 5-3.
HOLES ALIGNED WITH
WORKPLATE HOLES
Figure 5-3.
Fastening Disk Location on the Workplate
C. From the underside of the workplate, place a M10 X 40mm hex head cap screw with washer in the clearance hole
in the workplate through the hole in the Fastening Disk, as shown in figure 5-4. Hold it in position.
M10 HEX HEAD
CAP SCREW
Figure 5-4.
View of the Fastening Disk
L19004-XA02UEN-E1-S05, REV. D WRENCHES
Copyright © 2019 Amatrol, Inc.
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SKILL 5 USE A RATCHET WRENCH TO TIGHTEN A THREADED FASTENER
D. Place an M10 flat washer, an M10 lock washer, and an M10 nut on the hex head cap screws and hand tighten, as
shown in figure 5-5.
M10 HEX NUT
M10 LOCK
WASHER
M10 FLAT
WASHER
Figure 5-5.
Fastening Disk Fastener
E. Repeat substeps B through D for the remaining holes in the Fastening Disk, as shown in figure 5-6.
HAND TIGHT
Figure 5-6.
Fastening Disk Fasteners
L19004-XA02UEN-E1-S05, REV. D WRENCHES
Copyright © 2019 Amatrol, Inc.
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SKILL 5 USE A RATCHET WRENCH TO TIGHTEN A THREADED FASTENER
F. Place the 17-mm 3/8-inch drive deep socket on the 3/8-inch drive of the Ratchet Wrench.
3/8-INCH RATCHET
WRENCH
17-MM DEEP
SOCKET
Figure 5-7.
Wrench
NOTE
Remember, some ratchet wrenches have release buttons that must be pushed to install or remove the socket.
This is to prevent accidental disconnection of the ratchet wrench and socket. If the wrench you are using has this
feature, push the button to engage and disengage the socket.
G. Place the 17-mm 3/8-inch drive socket on one of the M10 hex nuts.
17-MM
SOCKET
Figure 5-8.
Ratchet Correctly Placed on the Fasteners of the Fastening Disk
L19004-XA02UEN-E1-S05, REV. D WRENCHES
Copyright © 2019 Amatrol, Inc.
S05-5
SKILL 5 USE A RATCHET WRENCH TO TIGHTEN A THREADED FASTENER
H. Place the boxed end of the 17-mm combination wrench on the M10 hex head cap screw from the underside of the
workplate.
TIGHTENING
WRENCH
BACKUP
17-MM
COMBINATION
WRENCH
Figure 5-9.
Backup Wrench
I. Tighten the fasteners by pulling the ratchet wrench clockwise toward your body in a smooth motion while holding
the fastener head with the backup wrench. When you reach the end of your arm’s travel, rotate the handle in the
reverse direction to reposition it to the start position. Continue this until the split ring lock washer on that fastener
stack-up is fully compressed.
PULL
Figure 5-10. Tighten the Fasteners
NOTE
You may have to reverse or “ratchet” the wrench several times to avoid obstacles or in a confined area.
L19004-XA02UEN-E1-S05, REV. D WRENCHES
Copyright © 2019 Amatrol, Inc.
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SKILL 5 USE A RATCHET WRENCH TO TIGHTEN A THREADED FASTENER
J. Remove the wrench when the fasteners are tightened.
K. Repeat substeps F through J for the remaining fasteners following the bolt tightening sequence shown in figure
5-11.
Figure 5-11. Tightening Sequence
L. Remove the wrenches.
This completes the tightening of the Fastener Disk to the Notched Disk.
7. Disassemble and return the parts and tools to their proper storage.
L19004-XA02UEN-E1-S05, REV. D WRENCHES
Copyright © 2019 Amatrol, Inc.
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