SPRING 0973795 - Caterpillar

Table 3
Required Tools    
Tool    Item    Qty    Part No    Description    
A         198-4240     Digital Pressure Indicator Gp    
    A1     1     198-4234     Digital Indicator    
A2 1     198-4237     Pressure Sensor Gp
(0 to 3,445 kPa (0 to 500 psi))    
A3 1     198-4236     Adapter Cable As    Test Preparation - Pressure Leak Down
Move the machine to a smooth horizontal location.
Place the steering control lever in the NEUTRAL position.
Engage the parking brake.
Lower the attachments to the ground.
Stop the engine.
Turn the key to the ON position, but do not start the engine.
Verify that the implement lockout switch is in the UNLOCKED position.
Move the control levers through the full range of travel several times which should relieve any pressure that may be present in the implement hydraulic system.
Make sure that the pressure in the entire hydraulic system has been released.
Turn the key to the OFF position.
Observe the state of the amber hazardous voltage present lamp. If the lamp is illuminated, do not perform any type of service on the machine. Wait until the lamp is not illuminated. Then, perform the lamp test in the next step.
While you observe the lamp, turn the disconnect switch to the OFF position. Then turn the disconnect switch to the ON position.Note: When the disconnect switch is cycled, the amber hazardous voltage present lamp will illuminate briefly. Then, the lamp will turn off which indicates that the operation of the lamp is correct.
If an error message for the lamp circuit is displayed, or if the operation of the hazardous voltage present lamp does not appear to be correct, refer to the Troubleshooting, "General Information" section of the manual for information on troubleshooting the lamp circuit.
Once the hazardous voltage level has been verified to be below 50.0 VDC, the machine can be serviced. Proceed to the next step.
Locate the pressure test port on the brake, implement, steering manifold. The accumulator manifold is located on the front of the hydraulic tank on the left side of the tractor.
Illustration 2 g03700860
Illustration 3 g03703600
Attach tooling (A) to pressure port (AC) on the brake, implement, steering manifold.Note: This test will only test the accumulator for the implement system. In order to test the accumulator for the steering and braking system, switch the accumulators and conduct the test again.Test Procedure - 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 (AC) .
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 (AC) .
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