BUSHING 0005917 - Caterpillar

Test Preparation - Accumulator Leak Down
Move the machine to a smooth horizontal location.
Engage the parking brake.
Lower all of the implements.
Stop the engine.
Turn the key to the ON position. Make sure that the implement lockout switch is turned to the UNLOCKED position. Move the implement control levers to all positions several times in order to release any pressure in the hydraulic system.
Illustration 2 g01234913
D5N with FTC AGG1335-UPAKD1135-UPCFH0300- UPCKT0400-UP
Illustration 3 g01234914
D6N with FTC CBF0300-UPCCG0400-UPALH0400-UPCBJ0400-UPALR0635-UP
Illustration 4 g01244714
D6N with differential steeringAKM1235-1793ALY1335-1887ALY1889-2065CCK0500-0701CBL0400-UPCCS0400-UP
Illustration 5 g01258217
AKM1794-UPALY1888, 2066-UPCCK702-UPThe pressure tap is located behind an access door on the right fender of the machine. (3) Pilot supply pressure (pressure after pressure reducing valve)
Attach tooling (B) to pressure tap (3) .Test Procedure - Accumulator Pilot Oil Pressure Leak Down
Start the engine. Warm the hydraulic oil to a minimum temperature of 65° C (150° F).
Record the pressure reading on pressure tap (3) .
Stop the engine. Turn the key to the ON position but do not start the machine.
With the implement lockout switch in the UNLOCKED position, record the pressure reading at pressure tap (3) .
The pressure reading should not drop more than 700 kPa (101 psi) in 2 minutes. If a pressure drop greater than 700 kPa (101 psi) occurs, the pilot oil system should be checked for excessive leakage.Adjustment Procedure - Pressure Leak Down
There are no adjustments that can be made to reduce pressure leaks in the system. Investigate the components of the charging system to determine the cause of the system leakage.Accumulator Charge Pressure Testing
The accumulator is located behind an access panel on the right side of the operator station.
Illustration 6 g01072986
(1) Accumulator (2) Manifold and reducing valve
Remove the access panel to the accumulator.
Turn off the engine. Position the start switch to the ON position. Move the joystick through the full range of travel. Repeat moving the lever several times.Note: Purge off the hydraulic pressure in the system before placement of the gauge. Moving the joystick and moving the levers will release the pressure in the system.
Attach the Tooling (B) to pressure tap (3) for pilot pressure on the right fender.
Start the engine and exercise the implement hydraulics at HIGH idle. The pilot pressure should be a maximum of 3275 175 kPa (475 25 psi).
Shut off the engine. Turn the key to the ON position. The accumulator charge pressure should remain steady until an implement control is exercised.
With the implement lockout switch in the UNLOCKED position, move the implement control out of the HOLD position in any direction in order to actuate a function. Return the handle to the hold position between activations of the handle. Quick movement of the handle should increase the accuracy of this test.
With the handle in the HOLD position between activations, record the reading on tooling (B) .
Repeat Step 6 and Step ,7 recording the reading each time the handle is returned to the HOLD position until the pressure reading at tooling (B) is zero.
The last pressure reading recorded on tooling (B) is a close approximation of the nitrogen precharge in the accumulator.
Refer to Table