Boeing CH47
Boeing CH47 Component and Systems Overview
Eaton’s Aerospace Group Product Capabilities
The Boeing Chinook is a
tandem rotor, medium-lift
helicopter that meets tactical
and combat support mission
requirements for military
forces around the world. The
Chinook is the worlds most
reliable and efficient transport
helicopter, capable of handling
useful loads up to 24,000
lbs. and a maximum gross
weight of up to 50,000 lbs.
(22,668 kg). Its tandem rotor
configuration also provides
exceptional handling qualities
that enable the CH47 to
operate in climatic, altitude
and crosswind conditions
that typically keep other
helicopters from flying.
The Chinook has been in
the U.S. Army service since
1962. The CH47F/ MH47G
modernization program is
now in full-rate production,
and will ensure this tandem
rotor medium-lift helicopter
remains in the Army fleet at
least through the 2030s. It is
conceivable that Chinooks will
be Army Aviation assets for a
century or more. In addition,
Chinooks have served the
armed forces of more than
15 international customers
and performed in commercial
service around the world.
The CH47F is an advanced
multi-mission helicopter
for the U.S. Army and
international defense forces.
It contains a fully integrated,
digital cockpit management
system, Common Aviation
Architecture Cockpit and
advanced cargo handling
capabilities that complement
the aircraft’s mission
performance and handling
characteristics.
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Eaton is a recognized leader in
the aerospace industry and is a
key supplier of fluid power, fuel
systems, electro-mechanical,
fluid conveyance, power and
load management and avionics
products on the CH47. With
this cutting edge technology,
Eaton provides a broad array of
products including the Electric
Pump for Utility System Hydraulic
Accumulator (EPUSHA) system.
Eaton’s contribution to the
EPUSHA system consists of two
main components: an electric
motor pump (EPUSHA pump) and
a control box. These components,
bundled with a wiring harness,
mounting plate, and miscellaneous
hardware, are available as a
modification kit that can be
installed to eliminate the need for
hand-pressurizing the hydraulic
accumulators required to start a
CH47 auxillary power unit (APU).
Although this system is intended
to replace a dual-action, single
piston, hand operated hydraulic
pump, the hand operated pump
remains in the circuit as a back-up.
The EPUSHA system significantly
reduces the man power and time
needed to start the CH47.
The CH47’s 3000 psi hydraulic
system is provided and managed
by Eaton’s hydraulic system’s
division components.
It incorporates three transmission
driven pumps, power transfer
units, main engine starters, rescue
hoist drive motor, cargo winch
drive motor, APU starter/pump and
hydraulic accumulator and brake
master cylinder assembly.
Recently, Eaton has offered an
enhanced transmission driven
pump to improve reliability,
readiness, quality and safety to the
CH47 user community.
EATON CORPORATION AEROSPACE C5-26 May 2009
Eaton’s conveyance system
division products on the CH47
include Aeroquip® brand selfsealing quick disconnect couplings
and various hose assemblies
per AS1339, MIL-DTL-25579 and
AS620/AS1227 standards. Other
conveyance type products power
the T55 engine on the CH47,
including Eaton’s carbon main
bearing seals and gearbox seals.
Eaton also offers various
electrical power and load
management products including
circuit protection and sealed
electrical components for harsh
environments. For example, the
new sealed cockpit and airframe
circuit breakers. Also included in
the CH47 components content
are pressure switches and
transducers, chip detectors,
remote controlled circuit breakers
and an oil filler assembly.
In addition to systems and
components for the CH47
community, Eaton also provides
customer service and support
worldwide. Eaton is committed
to servicing, supporting and
enhancing the products supplied
to customers and end users.
Following are Eaton’s Army
contacts in the Aerospace Group:
Boeing CH47 System Components
EATON CORPORATION AEROSPACE C5-26 May 2009
2
External Cargo Hook Actuating
Cylinder
The external cargo hook
actuating cylinder allows, in the
case of an emergency, a means
of releasing the cargo or payload
attached to the center cargo
hook. The center cargo hook is
installed on a beam suspended
under the center cabin floor in
the center of the helicopter.
In emergency mode, when
activated by a cockpit switch, the
energized release of a 28 VDC
solenoid on the center hook
allows pneumatic pressure from
a chamber in the hook actuating
cylinder to flow to an auxiliary
piston in the cylinder. Motion
of this piston raises the cylinder
to open the hook. When the
solenoid is de-energized (after 10
seconds), the directed pressure
is vented to atmosphere. The
remaining pressure in the
pressurized chamber moves the
cylinder to close the hook.
Hose Assemblies
Eaton's Aeroquip brand
hose assemblies are utilized
extensively throughout the CH47
aircraft. The assemblies can be
found in the hydraulic system,
the oxygen system, the fuel
system and lube oil system.
Eaton provides 3,000 psi
stainless steel braided Teflon®
hose assemblies per AS1339,
1500 psig rated Teflon hose
assemblies per MIL-DTL-25579,
601/AE701 fuel hose assemblies
per MIL-DTL-83797 and the
AE502 ballistic self-sealing hose
assemblies. Eaton's designation
of product for the hydraulic
system is the AE246 and 666
series hose assemblies. The
suction side of the hydraulic
system also uses AE641
convoluted Teflon hose per
AS620/AS1227. The extended
range fuel tanks, standard on
the CH47F, uses Nomex Braided
convoluted Teflon hose, AE645
type hose, inside the fuel cell.
Remote Controlled Circuit
Breaker
Eaton's remote control circuit
breaker (RCCB) is a combination
relay and circuit breaker which
can be released or set by
applying a release or set coil
current electronically controlled
by a command from the
Indicator/Control Unit (I/CU) (a
1/2 ampere fast trip, thermal
circuit breaker). The RCCB
is rated at 115/200v, 400Hz,
continuous duty, 40 amperes
with a high rupture capability of
3600 amps. The unit utilizes a
magnetically latched coil with
double break contact design.
The remote controlled circuit
breaker combines the function
of a mechanical contactor in
conjunction with current sensing
capability. This RCCB also has a
single pole double throw (SPDT)
28vdc / 115vac 400 Hz auxiliary
contact rated at 3 amps.
Oil Filler Assembly
Chip Detector
Pressure Switch
Eaton's easy "flip open cap"
oil filler assembly filters media
in the cap to prevent oil from
splashing out of the reservoir.
Eaton’s Tedeco® brand chip
detectors provide remote
sensing of the presence of
ferro-magnetic wear particles
in lube systems of the engines,
transmissions and auxiliary
power units.
Eaton's pressure switches
are used for main engine and
auxiliary power unit (APU) pump
pressure indication/monitoring.
3
EATON CORPORATION AEROSPACE C5-26 May 2009
Power Assisted Master
Hydraulic Brake Cylinder
Eaton’s master brake cylinder
helps control braking on the
CH47. On either side of the
cockpit, four identical master
brake cylinders are mounted
in the chin bubble area and are
attached to each of the pilot’s
pedals. The four wheels of the
forward landing gear, and two
wheels of the aft landing gear,
are equipped with self adjusting
disk brakes. Both forward and
aft brakes can be applied and
brake pressure maintained by
depressing the pedals. Hydraulic
pressure is supplied by the
utility hydraulic system. The left
side landing gear wheel brakes
operate independently from the
right side. Pressing either the
pilots or co-pilots left pedal to
depress the left master cylinder
will operate the left side wheel
brakes. Pressing either right
side pedal to depress the right
master cylinder will operate the
right side wheel brakes.
Self-Sealing Quick Disconnect
Couplings
Eaton's Aeroquip brand 3200
series self-sealing quick
disconnect couplings are
3000 psi. This allows for a
quick connect and disconnect,
positive action with valves
opening simultaneously
with locking action, no fluid
loss during connection or
disconnection, and has no cavity
to trap air, dirt or moisture.
Hydraulic Brake Transfer Valve
Transmission Driven Pump
Power Transfer Unit (PTU)
Main Engine Starter
When either the pilots or
co-pilots brake pedals are
pressed, pressure from the
master brake cylinders goes
to a transfer valve in the brake
lines. This allows independent
braking by either pilot. From
these transfer valves, pressure
is directed through a parking
brake valve to the forward and
aft wheel brakes.
Eaton's Vicker's brand
tranmission driven pumps
provide hydraulic power to the
CH47's primary and secondary
hydraulic systems.
Eaton's Vicker's brand power
transfer unit (PTU) provides
hydraulic power between
hydraulic systems without the
transfer of system fluid.
Eaton's Vicker's brand main
engine starter is a clutched
hydraulic motor that rotates the
T55 engine by utilizing hydraulic
power provided by the APU
starter/pump.
Cargo Winch Drive Motor
Eaton's Vicker's brand cargo
winch drive motor is a bentaxis hydraulic motor providing
bi-directional mechanical shaft
power to drive the cargo winch.
.
APU Starter/Pump
EPUSHA Control Box
Eaton’s control box manages the
electrical power to the EPUSHA for
on/off control as well as minimum
battery voltage required for APU
ignitor function.
Electric Pump for Utility
System Hydraulic
Accumulator (EPUSHA)
Eaton’s electric pump for
utility system hydraulic
accumulator (EPUSHA) is a DC
electric motor-powered pump
(motorpump) that is installed as
a primary source for recharging
the utility system hydraulic
accumulators required to start a
CH47 APU.
TM
Eaton's Vicker's brand APU
starter/pump functions as
a hydraulic motor to start
the APU and then converts
to a pump when the APU
maintains sustainable speed.
The pump recharges the utility
accumulators and powers the
main engine starters.
Rescue Hoist Drive Motor
Seals
Pressure Transducer
Eaton's Vicker's brand rescue
hoist drive motor is a bentaxis hydraulic motor providing
bi-directional mechanical shaft
power to drive the rescue hoist
reel.
Eaton is the source for all carbon
main bearing seals and gearbox
seals for the Honeywell T55 engine
powering the CH47.
Eaton's pressure transducers
monitor the oil inlet pressures
of the five transmissions on
the CH47 and allow them to be
displayed in the cockpit.
EATON CORPORATION AEROSPACE C5-26 May 2009
EATON CORPORATION AEROSPACE CH47 April 2009
4
4
Location
Hydraulic Systems Division
Cage Codes
Los Angeles , California
99643, 76050, 09790, and 52906
Jackson, Mississippi
62983 and 90166
Bedhamptom, England
K4413
Fuel Systems Division
Titchfield, England
Euclid, Ohio
Inglewood, California
Irvine, California
Conveyance Systems Division
Jackson, Michigan
Beltsville, Maryland
Warwick, Rhode Island
Taccoa, Georgia
Redditch, England
Serres-Castet, France
Coignieres, France
Gilching, Germany
Electrical Sensing & Controls
Bethel, Connecticut
Costa Mesa, California
Glenolden, Pennsylvania
Grand Rapids, Michigan
Sarasota, Florida
5
K2523, inclusive of U1918 and U9084
59875
OCMF7
86090
00624
15284
77842
8W928
U2569
FA9C4
F0562
C2178
02750
96182, 99145, 27878
97484, 16780
17472, 99145, 09790, and 72121
81640, and 76374
EATON CORPORATION AEROSPACE C5-26 May 2009
PARTIAL LIST
DESCRIPTION
NSN
P/N
Alt. P/N
CAGE
COUPLING HALF, QUICK DISCONNECT
4730-00-903-4451
3302-4
210-82234-9
00624
COUPLING HALF,QUICK
4730-00-773-2620
3755-6
N/A
00624
COUPLING HALF,QUICK
4730-00-815-2945
155-S5-6D
24355-100
00624
COUPLING HALF,QUICK DISCONNECT
4730-00-554-7737
155S5-8D
24333-100
00624
FUEL HOSE ASSEMBLY, NONMETALLIC, 0.219 IN. ID
4720-00-554-9854
601002-4-0126
114PS100-11
00624
HOSE ASSEMBLY,NONMETALLIC
4720-01-354-9004
AE705801-1
114PS507-1
00624
RYNGLOK REPAIR TOOL KIT
VARIOUS
VARIOUS
VARIOUS
00624
SV3-150-6 ENGINE START
2995-01-776-7732
420078
114HS200
00624
PRESSURE SWITCH
5930-01-307-9188
211C117-155
145DS027-5
02750
02750
PRESSURE SWITCH
5930-01-309-4365
211C117-156
145DS027-6
ELBOW,FLANGE TO TUBE
4730-01-441-4526
401091-11
N/A
08118
EPUSHA PUMP
4320-01-561-7214
3032171-001
N/A
62983
HYD MOTOR PUMP, APU STARTER
1650-01-119-7429
961585
145HS520-6
62983
HYDRAULIC POWER TRANSFER UNIT
1650-01-114-2177
569774
114HS140-8
62983
HYDRAULIC POWER TRANSFER UNIT
4320-01-118-4428
569776
145HS140-10
62983
HYDRAULIC PUMP, AXIAL PISTONS
1650-01-115-3948
571123
145HS100-3
62983
HYDRAULIC PUMP, TRANSMISSION DRIVEN
1650-01-516-6740
145HS100-5
PV3-075-20A
62983
HYDRAULIC PUMP, TRANSMISSION DRIVEN
1650-01-516-6740
3030434-001
145HS100-5
62983
EPUSHA PUMP CONTROLLER
5930-01-565-7548
SX7EG23
SX7EG23-1
81640
SWITCH, TOGGLE
5930-01-140-4716
8906K3157
N/A
81640
STARTER
2995-00-134-4682
53WK16002
114HS200
90166
STARTER, ENGINE, HYDRAULIC
2995-01-072-5918
53WK16008
114HS200
90166
AIRFLOW CONTROL ASSEMBLY
1680-01-120-7634
2Z1629-1
414A4074-1
97484
BREATHER
1615-01-116-7085
A8820
N/A
97484
CHIP DETECTOR ASSY., SELF CLOSING
1615-01-113-0285
B4486A
N/A
97484
CHIP DETECTOR
1615-01-116-2898
B4079C
N/A
97484
CHIP DETECTOR
1615-01-116-7086
B553A
N/A
97484
CHIP DETECTOR
2995-01-109-2512
K203AG
2-300-809-01
97484
CHIP DETECTOR
2995-01-298-3114
1B309
234DS671-1
97484
CHIP DETECTOR
2995-01-393-8519
1B737
2-300-978-01
97484
CHIP DETECTOR FILTER
2840-00-463-4810
A32381
N/A
97484
DEBRIS INDICATING SCREEN
4730-01-112-5971
A8760
N/A
97484
DETECTOR, METALLIC PARTICLE
1615-01-114-2151
B4386A
N/A
97484
DETECTOR, METALLIC PARTICLE
2995-01-298-3113
1B1065
N/A
97484
DRAIN FITTING
N/A
2Z1286-2
N/A
97484
DRAIN VALVE
4820-01-118-5846
B550A
N/A
97484
ELECTRO/OPTICAL LEVEL SENSOR
6680-01-311-2011
2F2633
N/A
97484
FILLER
1615-01-112-2994
F900DB
N/A
97484
FILLER
1615-01-114-0848
F9701
N/A
97484
FILTER
1650-00-920-3614
A6334A
N/A
97484
FUEL DRAIN VALVE
1680-01-121-5195
2C1262
114PS509-1
97484
FULL FLOW DEBRIS MONITOR
2995-01-298-3115
1D1066
N/A
97484
INDICATOR, SIGHT, LIQUID
6680-01-118-1688
PS54B
CS2010-156230
97484
OIL LEVEL SIGHT PLUG, T/R TRANSMISSION
6680-01-118-1687
PS53B
521-513-9202
97484
POWER MODULE - CHIP BURN OFF SYSTEM
5895-01-298-4578
1J256-4
145ES026-1
97484
SCREEN HOUSING
1615-01-113-0218
F9662A
N/A
97484
SCREEN HOUSING
1615-01-113-0219
F9662B
N/A
97484
SELF-CLOSING VALVE
1615-01-114-2152
B4387A
N/A
97484
SIGHT PLUG
1615-01-112-5878
PS85E
N/A
97484
STRAINER
4730-00-012-4636
F995
N/A
97484
STRAINER
4730-00-920-3613
F9115
N/A
97484
STRAINER,SEDIMENT
4730-01-112-3061
A8759
N/A
97484
TRANSMISSION STRAINER
N/A
MF981-7
N/A
97484
ACCUMULATOR, HYDRAULIC
1650-01-122-7091
60910
145HS656-1
99643
CARGO HOOK CYLINDER ASSY.
1650-01-123-2704
51980
173HS510-1
99643
CYLINDER ASSEMBLY,HYDRAULIC BRAK
1630-00-056-2329
18050-10
114HS105-6
99643
ENGINE AND APU STARTER VALVE
1650-01-117-2238
60930
114HS552-1
99643
SLEEVE AND SLIDE,DIRECTIONAL CONTROL LINEAR VALVE
4820-01-986-6055
17734
N/A
99643
VALVE, AGB, APU STARTER
1650-00-034-3723
22200-3
114HS132-3
99643
VALVE, TRANSFER, HYDRAULIC
1630-00-070-2706
25090
114HS118-2
99643
201 Lindbergh Ave. Livermore, CA 94551
P: 925.455.9900 | F: 925.455.9901
www.aeroprecision.com
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