SEAL 2170371 - Caterpillar

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) .
Turn on the handle for needle valve (9) in a counterclockwise direction. Turning the handle will allow the pressure in hose (16) to vent.
Remove Tool (A) from the machine.
Install the protective cap on nitrogen charging valve (2) .
Install guard (1) on the accumulator.Charging Procedure
Illustration 11 g02606538
Accumulator Valve (1) Guard. (2) Charging Valve. (A) Protective Cap.
Illustration 12 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 the correct pressure reading on gauge (5). Refer to Table 2 for the correct pressure for your machine.Note: The pressure reading in Table 2 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 4 through 8 for the proper pressure for your machine.
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 13 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