COUNTERWEIGHT AS 3727602 - Caterpillar

Specifications
Table 1
Charging Pressure and Temperature Relationship for a Typical
2300 kPa (334 psi) Accumulator    
Temperature     Pressure    
−7 °C (20 °F)    
2083 kPa (302 psi)    
−1 °C (30 °F)    
2126 kPa (308 psi)    
4 °C (40 °F)    
2170 kPa (315 psi)    
10 °C (50 °F)    
2213 kPa (321 psi)    
16 °C (60 °F)    
2257 kPa (327 psi)    
21 °C (70 °F)    
2300 kPa (334 psi)    
27 °C (80 °F)    
2343 kPa (340 psi)    
32 °C (90 °F)    
2387 kPa (346 psi)    
38 °C (100 °F)    
2430 kPa (352 psi)    
43 °C (110 °F)    
2474 kPa (359 psi)    
49 °C (120 °F)    
2517 kPa (365 psi)    Introduction
This procedure describes the method for testing and charging the ride control accumulator. The procedure includes the following:
Shutdown procedure
Nitrogen test and charging procedure
Testing the ride control diverter valve
Road testTest Preparation
Shutdown Procedure
Start the engine and move the machine to a hard, level surface.
Move the transmission control lever to the NEUTRAL position.
Engage the parking brake.ReferenceFor more information about preparing the machine for testing and charging the ride control accumulator, refer to the Service Manual module Testing and Adjusting, "Machine Preparation for Troubleshooting".
Illustration 1 g02937618
Location of ride control button on the panel
Press and hold ride control button (1) for 2 seconds to put the ride control system in service mode. Two indicators should be illuminated.
Lower the bucket to the ground.
Move the lift control lever to the FLOAT position. The hydraulic pressure in the accumulator will be relieved.ReferenceFor more information about releasing the hydraulic pressure in the system, refer to the Service Manual module Testing and Adjusting, "System Pressure - Release".
Turn the engine start switch key to the OFF position.
Disconnect the hydraulic lines for servicing, as needed.Nitrogen Test and Charging Procedure
Illustration 2 g02937677
(2) Ride control accumulator
Illustration 3 g02712876
Ride control accumulator (3) Nitrogen charging valvePressure Release
Refer to Special Instruction, REHS5464, "Accumulator Discharging and Charging Procedures" for the required tooling, and the testing and charging procedure.Nitrogen Charging Procedure
Refer to Special Instruction, REHS5464, "Accumulator Discharging and Charging Procedures" for the required tooling, and the testing and charging procedure.Testing the Ride Control Diverter Valve
The following procedure is used to determine whether the check valve for the rod end of the lift cylinders is operating correctly. Perform this test after the ride control accumulator is charged.
Start the machine.
Press ride control button (1) to turn off the ride control system.
Place the bucket in the full DUMP position. Lift the front wheels off the ground by moving the lift control lever to the LOWER position.
When the front wheels are off the ground, place the lift control lever in the HOLD position. In approximately 5 seconds, press and hold ride control button (1) for 2 seconds to turn on the ride control system. Two indicators should be illuminated. The front wheels should lower to the ground.If the wheels do not lower to the ground, the diverter spool has not shifted to the ON position.