CYLINDER & LINES GP-BOOM 2898148 - Caterpillar

Table 2
966G Accumulator Precharge Pressure/Temperature Relationship for a Typical Ride Control Accumulator with a Precharge of
2960 kPa (430 psi)    
Temperature     Pressure (1)    
-7°C (20°F)    
2690 kPa (390 psi)    
-1°C (30°F)    
2745 kPa (398 psi)    
4°C (40°F)    
2800 kPa (406 psi)    
10°C (50°F)    
2855 kPa (414 psi)    
16°C (60°F)    
2910 kPa (422 psi)    
21°C (70°F)    
2960 kPa (430 psi)    
27°C (80°F)    
3020 kPa (438 psi)    
32°C (90°F)    
3075 kPa (446 psi)    
38°C (100°F)    
3130 kPa (454 psi)    
43°C (110°F)    
3185 kPa (462 psi)    
49°C (120°F)    
3240 kPa (470 psi)    
( 1 ) Nominal allowable tolerance equals 35 kPa ( 5 psi).
Table 3
972G Accumulator Precharge Pressure/Temperature Relationship for a Typical Ride Control Accumulator with a Precharge of
2960 kPa (430 psi)    
Temperature     Pressure (1)    
-7°C (20°F)    
2690 kPa (390 psi)    
-1°C (30°F)    
2745 kPa (398 psi)    
4°C (40°F)    
2800 kPa (406 psi)    
10°C (50°F)    
2855 kPa (414 psi)    
16°C (60°F)    
2910 kPa (422 psi)    
21°C (70°F)    
2960 kPa (430 psi)    
27°C (80°F)    
3020 kPa (438 psi)    
32°C (90°F)    
3075 kPa (446 psi)    
38°C (100°F)    
3130 kPa (454 psi)    
43°C (110°F)    
3185 kPa (462 psi)    
49°C (120°F)    
3240 kPa (470 psi)    
( 1 ) Nominal allowable tolerance equals 35 kPa ( 5 psi).
Open needle valve (9) . The nitrogen pressure should show on the 8T-0858 Pressure Gauge within 20 seconds.Note: If the nitrogen pressure shows on the pressure gauge in less than 10 seconds, close screw (12) on regulator assembly (11) and needle valve (9) . Disconnect hose assembly (6) from needle valve (9) . Repeat Steps 5 through 19.
Turn tee handle (14) on chuck (15) all the way in the counterclockwise direction. Close regulator (11) and needle valve (9) . Slowly disconnect hose (6) from needle valve (9) . Open needle valve (9) . Remove chuck (15) from nitrogen charging valve (2) on the ride control accumulator.
Install the protective cap on the nitrogen charging valve (2) .Testing the Ride Control Diverter Valve
The following procedure is used to determine whether the diverter valve is operating correctly. Perform this test after the ride control accumulator is charged.
Illustration 6 g00800462
Cab Controls (Right Side) (1) Ride Control Switch
Start the machine.
Move ride control switch (1) to the OFF position.
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, the ride control switch is moved to the ON position. 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. The following conditions are