BASE AS-FILTER 3465577 - Caterpillar

Illustration 13 g02606538
Accumulator Valve (1) Guard. (2) Charging Valve. (A) Protective Cap.
Illustration 14 g00282185
(3) Nipple. (4) Coupling assembly. (5) Pressure gauge. (6) Hose assembly. (7) Coupling assembly. (8) Nipple. (9) Valve. (10) Pressure gauge. (11) Regulator assembly. (12) Pressure regulating screw. (13) Chuck for the nitrogen cylinder valve. (14) Valve handle. (15) Chuck. (16) Hose assembly. (17) Tee.Before proceeding to the test procedure that follows, complete the procedure:
Testing and Adjusting, "Machine Preparation for Troubleshooting"
Perform Step 1 through Step 9 of the "Testing Procedure for the Accumulator Precharge Pressure" for instructions on the installation of the nitrogen charging group.
Use Caterpillar Electronic Technician (ET) in order to turn the ride control ON.
Open the software program for the ET.
Select "Transmission ECM".
Select "Override Parameters" from the drop-down menu that is located under "Diagnostics".
Select "Change".
Select "ON" for the "New Value" .
Select "OK".
A window will appear on the screen that will ask you if you want to change the parameter. Select "Yes".
Open needle valve (9) .
Start the engine.
Pull back on the lift control lever in order to raise the boom to full lift.
Recenter the lift control lever.
Pull back on the lift control lever again. Pulling back on the control lever will cause the lift circuit to reach relief pressure.
Close needle valve (9) .
Lower the boom in order to place the work tool on the ground.
Move the lift control lever into the FLOAT.
Attach the open end of hose assembly (6) to needle valve (9) by using coupling (7) and nipple (8) .
Attach regulator assembly (11) to a nitrogen tank.
Adjust pressure regulating screw (12) in order to obtain a pressure reading of 5500 kPa (800 psi) on gauge (5) .Note: 5500 kPa (800 psi) is the appropriate pressure for the accumulator when the ambient temperature is 21 °C (70 °F). If the machine has been running for some time, the temperature of the accumulator may be different from the ambient temperature of the outside air. Refer to Table 2 for the proper pressure.
Open needle valve (9) . Measure the amount of time that is required for gauge (10) to obtain the charge pressure. Charging time should take 10 to 20 seconds.Note: If the charging time is less than 10 seconds, repeat Step 1 through Step 8 in order to exhaust the nitrogen gas from the accumulator. Repeat Steps 9 through 14 in order to charge the accumulator.
Once the accumulator is charged, close the nitrogen charging valve.
Illustration 15 g02606758
158-2336 Gas Valve
Accumulators equipped with a 158-2336 Gas Valve , with a wrench, tighten hex nut at location (B) of the nitrogen charging valve in a clockwise direction to close the nitrogen charging valve (2) . Tighten the hex nut to a torque of 8.8 2 N m (6.5 1.5 lb ft)
Illustration 16 g02614762
222-2367 Gas Valve Assembly
Accumulators equipped with a 222-2367 Gas Valve Assembly , turn valve handle (14) in a counterclockwise direction in order to close nitrogen charging valve (2) .
Close the valve on the nitrogen cylinder.
Slowly loosen chuck (15) from accumulator valve (2) and allow the pressure to vent