GLASS 1474722 - Caterpillar

Table 3
962G Accumulator Precharge Pressure/Temperature Relationship for a Typical Ride Control Accumulator with a Precharge of
3270 kPa (475 psi)    
Temperature     Pressure (1)    
-7°C (20°F)    
2994 kPa (435 psi)    
-1°C (30°F)    
3049 kPa (443 psi)    
4°C (40°F)    
3105 kPa (451 psi)    
10°C (50°F)    
3160 kPa (459 psi)    
16°C (60°F)    
3215 kPa (467 psi)    
21°C (70°F)    
3270 kPa (475 psi)    
27°C (80°F)    
3325 kPa (483 psi)    
32°C (90°F)    
3380 kPa (491 psi)    
38°C (100°F)    
3435 kPa (499 psi)    
43°C (110°F)    
2491 kPa (507 psi)    
49°C (120°F)    
2546 kPa (515 psi)    
( 1 ) Nominal allowable tolerance equals 35 kPa ( 5 psi).
Table 4
IT62G Accumulator Precharge Pressure/Temperature Relationship for a Typical Ride Control Accumulator with a Precharge of
2760 kPa (300 psi)    
Temperature     Pressure (1)    
-7°C (20°F)    
1793 kPa (260 psi)    
-1°C (30°F)    
1848 kPa (268 psi)    
4°C (40°F)    
1903 kPa (276 psi)    
10°C (50°F)    
1958 kPa (284 psi)    
16°C (60°F)    
2013 kPa (292 psi)    
21°C (70°F)    
2068 kPa (300 psi)    
27°C (80°F)    
2124 kPa (308 psi)    
32°C (90°F)    
2179 kPa (316 psi)    
38°C (100°F)    
2234 kPa (324 psi)    
43°C (110°F)    
2289 kPa (332 psi)    
49°C (120°F)    
2344 kPa (340 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 through .
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) which is 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 7 g00297434
(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 and move the ride control switch 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 probable causes:
The ride control switch is faulty.
The