BATTERY CHARGER 4247457 - Caterpillar

The test is performed in order to check the pressure for releasing the brake on the travel motor. Use the procedure on both travel motors.The procedure requires two people.Note: Use the information in the reference to prepare the machine for this test. Also, use the information in the reference to relieve any hydraulic pressure that may be in the hydraulic system.Reference: For the correct procedure to prepare the machine for this test, refer to Testing and Adjusting, "Machine Preparation for Troubleshooting" for the machine that is being serviced.Reference: For the correct procedure to relieve any hydraulic oil pressure that may be in the hydraulic system, refer to Testing and Adjusting, "System Pressure - Release" for the machine that is being serviced.
Table 1
Required Tools
Part Number Description Qty
198-4240 Digital pressure Indicator 1
177-7861 Hose Assembly 1
4I-4809 Pin Assembly 2
8T-7861 Connector 1
6V-6560 O-ring Seal 1
6V-3965 Fitting Assembly 1
3J-1907 O-ring Seal 1
FT-2547 Track Block Assembly 1
Place the machine on level ground.
Lower the work tool to the ground.
Shut off the engine.
Release all hydraulic system pressure. Refer to the reference for the correct procedure to relieve any hydraulic oil pressure.
Illustration 1 g01056729
Location of the Travel Motor
Remove the cover on the inside of the track roller frame in order to access the travel motor.
Illustration 2 g01166581
Travel Motor (left side)
(1) Port.
Remove the plug from port (1).
Assemble 8T-7861 Connector with 6V-6560 O-Ring Seal onto 6V-3965 Fitting As with 3J-1907 O-Ring Seal. Install the connector in port (1).
Attach the hose assembly with quick disconnect fittings and the digital pressure indicator onto the pressure tap.
Illustration 3 g01519962
The cross section view of the head for the travel motor
(2) 14.5 mm (0.57 inch)
(3) 18 mm (0.71 inch)
(4) Shim
The normal position of the adjustment screw for the brake relief valve is 18 mm (0.71 inch). Note: If the adjustment screw is turned into 14.5 mm (0.57 inch), the brake will not be active and the brake will not release. If the adjustment screw is turned into 18 mm (0.71 inch) (3), the brake will be active and the brake is adjusted to the normal position.
Illustration 4 g01520247
The cross section view of the brake release valve for the travel motor
(4) Shim
Shims that are 0.5 mm (0.0197 inch) thick will change the brake release pressure by 3.6 bar (50 psi). Increasing the shims (4) by 1 mm (0.040 inch) will increase the brake release pressure by 7.3 bar (100 psi).Decreasing shims (4) by 1 mm (0.040 inch) will decrease the brake release pressure by 7.3 bar (100 psi).Note: Excessive travel of piston (5) and damage to spring (6) may result if screw (3) is adjusted out more than 18 mm (0.71 inch).
Start the engine.
Warm the hydraulic oil to normal operating temperature. Normal operating temperature is 55 5°C (130 10°F).
Turn the engine speed dial until the engine speed is 1400 RPM on the display.
Read the pressure on the pressure indicator. The pressure should read zero on the pressure indicator.
Illustration 5 g00787596
Install the stoppers in both sprocket in order to block forward movement.
Illustration 6 g01162811
Hydraulic lockout
Shift the