Boeing CH47

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.

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.

Boeing CH47 Component and Systems OverviewEaton’s Aerospace Group Product Capabilities

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Eaton’s conveyance system division products on the CH47 include Aeroquip® brand self-sealing 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

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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.

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Oil Filler Assembly

Eaton's easy "flip open cap" oil filler assembly filters media in the cap to prevent oil from splashing out of the reservoir.

Chip Detector

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.

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.

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.

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.

Pressure Switch

Eaton's pressure switches are used for main engine and auxiliary power unit (APU) pump pressure indication/monitoring.

Hose AssembliesEaton'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.

Transmission Driven Pump

Eaton's Vicker'sTM brand tranmission driven pumps provide hydraulic power to the CH47's primary and secondary hydraulic systems.

Power Transfer Unit (PTU)

Eaton's Vicker's brand power transfer unit (PTU) provides hydraulic power between hydraulic systems without the transfer of system fluid.

Hydraulic Brake Transfer Valve 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.

Main Engine Starter

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.

APU Starter/Pump

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.

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.

Rescue Hoist Drive Motor

Eaton's Vicker's brand rescue hoist drive motor is a bent-axis hydraulic motor providing bi-directional mechanical shaft power to drive the rescue hoist reel.

Cargo Winch Drive Motor Eaton's Vicker's brand cargo winch drive motor is a bent-axis hydraulic motor providing bi-directional mechanical shaft power to drive the cargo winch. .

Seals

Eaton is the source for all carbon main bearing seals and gearbox seals for the Honeywell T55 engine powering the CH47.

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.

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Pressure Transducer

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.

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Location Cage CodesHydraulic Systems DivisionLos Angeles , California 99643, 76050, 09790, and 52906

Jackson, Mississippi 62983 and 90166

Bedhamptom, England K4413

Fuel Systems DivisionTitchfield, England K2523, inclusive of U1918 and U9084Euclid, Ohio 59875Inglewood, California OCMF7Irvine, California 86090Conveyance Systems DivisionJackson, Michigan 00624Beltsville, Maryland 15284Warwick, Rhode Island 77842Taccoa, Georgia 8W928Redditch, England U2569Serres-Castet, France FA9C4Coignieres, France F0562Gilching, Germany C2178Electrical Sensing & ControlsBethel, Connecticut 02750Costa Mesa, California 96182, 99145, 27878Glenolden, Pennsylvania 97484, 16780Grand Rapids, Michigan 17472, 99145, 09790, and 72121Sarasota, Florida 81640, and 76374

201 Lindbergh Ave. Livermore, CA 94551P: 925.455.9900 | F: 925.455.9901www.aeroprecision.comsales@aeroprecision.com

DESCRIPTION NSN P/N Alt. P/N CAGE

PARTIAL LIST

COUPLING HALF, QUICK DISCONNECT 4730-00-903-4451 3302-4 210-82234-9 00624COUPLING HALF,QUICK 4730-00-773-2620 3755-6 N/A 00624COUPLING HALF,QUICK 4730-00-815-2945 155-S5-6D 24355-100 00624COUPLING HALF,QUICK DISCONNECT 4730-00-554-7737 155S5-8D 24333-100 00624FUEL HOSE ASSEMBLY, NONMETALLIC, 0.219 IN. ID 4720-00-554-9854 601002-4-0126 114PS100-11 00624HOSE ASSEMBLY,NONMETALLIC 4720-01-354-9004 AE705801-1 114PS507-1 00624RYNGLOK REPAIR TOOL KIT VARIOUS VARIOUS VARIOUS 00624SV3-150-6 ENGINE START 2995-01-776-7732 420078 114HS200 00624PRESSURE SWITCH 5930-01-307-9188 211C117-155 145DS027-5 02750PRESSURE SWITCH 5930-01-309-4365 211C117-156 145DS027-6 02750ELBOW,FLANGE TO TUBE 4730-01-441-4526 401091-11 N/A 08118EPUSHA PUMP 4320-01-561-7214 3032171-001 N/A 62983HYD MOTOR PUMP, APU STARTER 1650-01-119-7429 961585 145HS520-6 62983HYDRAULIC POWER TRANSFER UNIT 1650-01-114-2177 569774 114HS140-8 62983HYDRAULIC POWER TRANSFER UNIT 4320-01-118-4428 569776 145HS140-10 62983HYDRAULIC PUMP, AXIAL PISTONS 1650-01-115-3948 571123 145HS100-3 62983HYDRAULIC PUMP, TRANSMISSION DRIVEN 1650-01-516-6740 145HS100-5 PV3-075-20A 62983HYDRAULIC PUMP, TRANSMISSION DRIVEN 1650-01-516-6740 3030434-001 145HS100-5 62983EPUSHA PUMP CONTROLLER 5930-01-565-7548 SX7EG23 SX7EG23-1 81640SWITCH, TOGGLE 5930-01-140-4716 8906K3157 N/A 81640STARTER 2995-00-134-4682 53WK16002 114HS200 90166STARTER, ENGINE, HYDRAULIC 2995-01-072-5918 53WK16008 114HS200 90166AIRFLOW CONTROL ASSEMBLY 1680-01-120-7634 2Z1629-1 414A4074-1 97484BREATHER 1615-01-116-7085 A8820 N/A 97484CHIP DETECTOR ASSY., SELF CLOSING 1615-01-113-0285 B4486A N/A 97484CHIP DETECTOR 1615-01-116-2898 B4079C N/A 97484CHIP DETECTOR 1615-01-116-7086 B553A N/A 97484CHIP DETECTOR 2995-01-109-2512 K203AG 2-300-809-01 97484CHIP DETECTOR 2995-01-298-3114 1B309 234DS671-1 97484CHIP DETECTOR 2995-01-393-8519 1B737 2-300-978-01 97484CHIP DETECTOR FILTER 2840-00-463-4810 A32381 N/A 97484DEBRIS INDICATING SCREEN 4730-01-112-5971 A8760 N/A 97484DETECTOR, METALLIC PARTICLE 1615-01-114-2151 B4386A N/A 97484DETECTOR, METALLIC PARTICLE 2995-01-298-3113 1B1065 N/A 97484DRAIN FITTING N/A 2Z1286-2 N/A 97484DRAIN VALVE 4820-01-118-5846 B550A N/A 97484ELECTRO/OPTICAL LEVEL SENSOR 6680-01-311-2011 2F2633 N/A 97484FILLER 1615-01-112-2994 F900DB N/A 97484FILLER 1615-01-114-0848 F9701 N/A 97484FILTER 1650-00-920-3614 A6334A N/A 97484FUEL DRAIN VALVE 1680-01-121-5195 2C1262 114PS509-1 97484FULL FLOW DEBRIS MONITOR 2995-01-298-3115 1D1066 N/A 97484INDICATOR, SIGHT, LIQUID 6680-01-118-1688 PS54B CS2010-156230 97484OIL LEVEL SIGHT PLUG, T/R TRANSMISSION 6680-01-118-1687 PS53B 521-513-9202 97484POWER MODULE - CHIP BURN OFF SYSTEM 5895-01-298-4578 1J256-4 145ES026-1 97484SCREEN HOUSING 1615-01-113-0218 F9662A N/A 97484SCREEN HOUSING 1615-01-113-0219 F9662B N/A 97484SELF-CLOSING VALVE 1615-01-114-2152 B4387A N/A 97484SIGHT PLUG 1615-01-112-5878 PS85E N/A 97484STRAINER 4730-00-012-4636 F995 N/A 97484STRAINER 4730-00-920-3613 F9115 N/A 97484STRAINER,SEDIMENT 4730-01-112-3061 A8759 N/A 97484TRANSMISSION STRAINER N/A MF981-7 N/A 97484ACCUMULATOR, HYDRAULIC 1650-01-122-7091 60910 145HS656-1 99643CARGO HOOK CYLINDER ASSY. 1650-01-123-2704 51980 173HS510-1 99643CYLINDER ASSEMBLY,HYDRAULIC BRAK 1630-00-056-2329 18050-10 114HS105-6 99643ENGINE AND APU STARTER VALVE 1650-01-117-2238 60930 114HS552-1 99643SLEEVE AND SLIDE,DIRECTIONAL CONTROL LINEAR VALVE 4820-01-986-6055 17734 N/A 99643VALVE, AGB, APU STARTER 1650-00-034-3723 22200-3 114HS132-3 99643VALVE, TRANSFER, HYDRAULIC 1630-00-070-2706 25090 114HS118-2 99643

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