|Required Tools    |
|Tool    ||Part Number    ||Part Description    ||Qty    |
|A    ||234-1614    ||Hydraulic Cap Seal    ||1    |
|B    ||138-7575    ||Link Bracket    ||2    |
|ZZ    ||6V-9509    ||Face Seal Plug    ||4    |
|6V-9830||Cap As    ||4    |
|6V-9511||Plug    ||2    |
|6V-9832||Cap As    ||2    |
|6V-9512||Face Seal Plug    ||2    |
|6V-9833||Cap As    ||2    |
|9U-7092||Tapered Cap/Plug    ||2    |
- Release the pressure in the hydraulic system. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
Note: SERVICE DATA: TOOLING (ZZ) WILL NOT BE IDENTIFIED IN PHOTOGRAPHS IN THE REMOVAL OR THE INSTALLATION. THIS TOOLING IS SHOWN IN ORDER TO ASSIST THE EXPERIENCED SERVICEMAN.
Note: Put identification marks on all hoses, on all wires, and on all tubes for installation purposes. Plug all hoses, and all tubes. This helps to prevent fluid loss, and this helps to keep contaminants from entering the system.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.
Refer to Special Publication, NENG2500, "AVSpare Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on AVSpare products.
Dispose of all fluids according to local regulations and mandates.
Keep all parts clean from contaminants.
Contamination of the hydraulic system with foreign material will reduce the service life of the hydraulic system components.
To prevent contaminants from entering the hydraulic system, always plug or cap the lines, fittings, or hoses as they are disconnected. Cover any disassembled components and clean them properly before assembly.
Clean the hydraulic system properly after any major component exchange or especially after a component failure, to remove any contamination.
Personal injury can result from hydraulic oil pressure and hot oil.
Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.
Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
- Install Tooling (A) in the hydraulic tank.
- Open the right, rear access door for the engine compartment.
- Remove cover assembly (1) that is located above the main hydraulic pump.
- Remove upper sheet (3) and remove support assembly (2) .
- Remove lower sheet assembly (4) .
- Remove plug (5) in order to drain the oil from the tube.
- Disconnect hose assemblies (6), (7), (8), and (9) .
- Disconnect harness assembly (10). Remove bolt (11) from the harness clip. Disconnect hose assembly (12) .
- Disconnect hose assemblies (13), (14), (15), and (16) .
- Disconnect harness assemblies (17) and (19). Remove bolt (18) that secures the harness assembly.
- Attach Tooling (B) and a suitable lifting device onto the main hydraulic pump. Remove the bolts from the case.
- Remove bolts (20) and remove pipe assembly (21) .
- Keep the main hydraulic pump and coupling level during removal. The main hydraulic pump and coupling weigh approximately 130 kg (287 lb).
- Remove bolts (22), inserts (23), and element (24) from the engine flywheel.
- Loosen setscrews (25) and remove coupling assembly (26) from the main hydraulic pump.
- Use the following procedure to disassemble the coupling assembly:
- Remove bolts (27) and remove inserts (28) from hub (30) .
- Remove pins (29) from the hub. Two pins are used to locate each insert.