SWITCH 4909998 - Caterpillar

10. Proceed to Step 11 if the accumulator precharge pressure is within the specification. You will need to charge the accumulator if the pressure is not within the specification. Proceed to "Charging Procedure" for instructions to charge the accumulator.11. Close nitrogen charging valve (2).
158-2336 Gas Valvea. For 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).
222-2367 Gas Valve Assemblyb. For 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).12. Turn on the handle for needle valve (9) in a counterclockwise direction. Turning the handle will allow the pressure in hose (16) to vent.13. Remove Tool (A) from the machine.14. Install the protective cap on nitrogen charging valve (2).15. Install guard (1) on the accumulator.Charging Procedure
Accumulator Valve
(1) Guard (2) Charging Valve (A) Protective Cap
(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) TeeBefore proceeding to the test procedure that follows, complete the procedure: Testing and Adjusting, "Introduction - Hydraulic System" to prepare the machine for Testing and Adjusting.1. 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.2. Use Caterpillar Electronic Technician (ET) in order to turn the ride control ON.a. Open the software program for the ET.b. Select "Transmission ECM".c. Select "Override Parameters" from the drop-down menu that is located under "Diagnostics".d. Select "Change".e. Select "ON" for the "New Value".f. Select "OK".g. A window will appear on the screen that will ask you if you want to change the parameter.3. Open needle valve (9).4. Start the engine.5. Pull back on the lift control lever in order to raise the boom to full lift.6. Recenter the lift control lever.7. Pull back in the lift control lever again. Pulling back in the control lever will cause the lift circuit to reach relief pressure.8. Close needle valve (9).9. Lower the boom in order to place the work tool on the ground.10. Move the lift control lever into the FLOAT.11. Attach the open end of hose assembly (6) to needle valve (9) by using coupling (7) and nipple (8).12. Attach regulator assembly (11) to a nitrogen tank.13. Adjust pressure regulating screw (12) in order to obtain a pressure reading of 2894 34 kPa (420 5 psi) on gauge (5). 2894 34 kPa (420 5 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