ALTERNATOR GP- 2212106 - Caterpillar

Introduction
This information includes the following tests:
Discharging the Accumulator
Testing Procedure for the Accumulator Pre charge Pressure
Charging Procedure
Brake Accumulator Pressure TestRequired Tools
Illustration 1 g03639629
Table 2
Required Tools    
Tool    Item    Qty    Part No    Description    
B     B1     1     8T-0862     Pressure Gauge
(-100 TO 500-KPA (-15 TO 72-PSI))    
B1 1     8T-0863     Pressure Gauge
(0 TO 250-KPA (0 TO 36-PSI))    
B1 1     8T-0853     Pressure Gauge
(0 TO 400-KPA (0 TO 58-PSI))    
B1 1     8T-0854     Pressure Gauge
(0 TO 1,000-KPA (0 TO 145-PSI))    
B1 1     8T-0855     Pressure Gauge
(0 TO 4,000-KPA (0 TO 580-PSI))    
B1 1     8T-08656     Pressure Gauge
(0 TO 6,000-KPA (0 TO 970-PSI))    
B1 1     8T-0857     Pressure Gauge
(0 TO 10,000-KPA (0 TO 1,450-PSI))    
B1 1     8T-0858     Pressure Gauge
(0 TO 16,000-KPA (0 TO 2,300-PSI))    
B1 1     8T-0859     Pressure Gauge
(0 TO 25,000-KPA (0 TO 3,600-PSI))    
B1 1     8T-0860     Pressure Gauge
(0 TO 40,000-KPA (0 TO 5,800-PSI))    
B1 1     8T-0861     Pressure Gauge
(0 TO 60,000-KPA (0 TO 8,700-PSI))    
B2 1     6V-3989     Fitting    
B3 2     6V-4143     Quick Connect Coupler    
B4 1     177-7860     Hose As
3.0 m (10 ft)    
B4 1     177-7861     Hose As
4.3 m (14 ft)    
B4 1     177-7862     Hose As
5.5 m (18 ft)    Machine Preparation
Prepare the machine for testing refer to Testing and Adjusting, "Machine Preparation for Testing and Adjusting" for the machine that is being serviced.Refer to Testing and Adjusting, " System Pressure - Release" to relieve hydraulic system pressure.Discharging the Accumulator
Refer to Special Instruction, REHS5464, "Accumulator Discharging and Charging Procedures" for the required tooling, and the testing and charging procedure.Testing Procedure for the Accumulator Pre charge Pressure
Refer to Special Instruction, REHS5464, "Accumulator Discharging and Charging Procedures" for the required tooling, and the testing and charging procedure.Charging Procedure
Refer to Special Instruction, REHS5464, "Accumulator Discharging and Charging Procedures" for the required tooling, and the testing and charging procedure.Brake Accumulator Pressure-Test
Move the machine to smooth, level ground that will support the weight of the machine.
Stop the machine and shut down the engine.
Engage the steering frame lock.
Apply the parking brake.
Illustration 2 g03639699
Brake accumulators are located on the left side of the machine under a shield , below the cab of the machine. (1) Front brake accumulator (2) Rear brake accumulator (3) Front Accumulator test tap (4) Rear accumulator test tap
Release pressure on accumulators by fully depressing the brake pedal up to 70 times until you feel the brake pressure drop.
Attach tooling (B) using the appropriate gauge onto the front brake accumulator test tap (3) .
Start the engine and bring hydraulic fluid to operating temperature.
Repeatedly depress and release the brake pedal until the brakes cut in and pressure holds.
Record the brake pressure.
Compare the recorded pressures to the pressures in Table 1
Repeat Step 5 through Step 10 to check pressure