HOOD & GUARD GP 2232942 - Caterpillar

Turn tee handle (14) on chuck (15) all the way in the counterclockwise direction. Attach appropriate chuck (15) to nitrogen charging valve (2) .Note: For a nitrogen charging valve with a 0.305 inch - 32 THD, use a 1S-8938 Nitrogen Charging Chuck. For a nitrogen charging valve with a 0.482 inch - 26 THD, use a 7S-5106 Nitrogen Charging Chuck .
Attach hose assembly (16) between chuck (15) and tee (17). Install needle valve (9) on one of the connecting points of the tee. Install 8T-0858 Pressure Gauge (10) in the remaining open port on the tee. The pressure gauge is rated at 0 to 16000 kPa (0 to 2300 psi).
Install coupling assembly (7) in the end of hose assembly (6) .
Install nipple (8) on needle valve (9). Place the open end of hose assembly (6) away from the work area and away from other personnel.
Open needle valve (9) and turn tee handle (14) on chuck (15) all the way in the clockwise direction.
Raise the bucket to the maximum height in order to relieve any additional nitrogen from the ride control accumulator.
Close needle valve (9) .
Lower the bucket to the ground. Move the lift control lever to the FLOAT position.
Install nipple (3) in the end of hose assembly (6) .
Attach the open end of hose assembly (6) to regulator assembly (11). Install an 8T-0859 Pressure Gauge in the port that is directly above the regulator. This pressure gauge is rated at 0 to 25000 kPa (0 to 3600 psi).
Install an 8T-0856 Pressure Gauge in the remaining port next to regulator assembly (11). This pressure gauge is rated at 0 to 6000 kPa (0 to 870 psi).
Install regulator assembly (11) on the nitrogen tank valve. Adjust screw (12) on regulator (11) in order to set the pressure on the 8T-0856 Pressure Gauge to the appropriate charge pressure.Note: To ensure that the accumulator nitrogen charge is correct, the accumulator piston must be at the bottom of the accumulator cylinder. Nitrogen pressure varies with the temperature. To obtain the most accurate nitrogen charge, the temperature of the accumulator should equal the outside air temperature. However, the temperature of the accumulator could be higher than the outside air temperature in some cases. If so, the temperature of the accumulator should be used instead of the outside air temperature.Note: The pressures in Table 2 are recommended for machines with typical buckets. For machines with heavy buckets, the nitrogen pressure may be increased. Increased pressure will keep the accumulator piston from striking an internal stop during normal roading while the ride control system is activated. However, raising the nitrogen pressure will result in a stiffer ride.
Table 2
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)