TUBE 2F6117 - Caterpillar

Table 1
Required Tools    
Part Number     Description    
198-4240     Digital Pressure Indicator    
Prepare the machine for troubleshooting.Reference: Troubleshooting, RENR6115, "Machine Preparation for Troubleshooting".
Illustration 1 g00923859
Right Side of the Machine
Illustration 2 g00916684
Location of the Combination Valve
Remove the guard from the right side of the machine in order to access the combination valve.
Illustration 3 g00923862
(1) Pressure tap (parking brake). (2) Pressure tap (four/eight wheel drive). (3) Pressure tap (High/low gear).
Connect a pressure gauge onto the pressure tap for the required section of the combination valve.Note: All three pressure taps measure the same pressure. You do not need to monitor all three pressure taps. A single pressure tap will measure all three valves.
Table 2
Pressure Settings for Valve Sections    
Control Valve     Pressure    
Parking Brake Valve    
2800 kPa (406 psi)    
Four/Eight Wheel Drive Valve    
2800 kPa (406 psi)    
High/Low Gear Valve    
2800 kPa (406 psi)    
Start the engine. Run the engine at low idle. Record the pressure setting. Refer to Table 2 for the correct pressure settings. If the pressure setting is not correct perform Step 5.
Illustration 4 g00923934
(4) Four/eight wheel drive valve. (5) High/low gear valve. (6) Parking brake valve. (7) Adjustment screw. (8) Locknut.
Loosen locknut (8) in order to adjust the three valves. Turn adjustment screw (7) until the correct pressure setting is reached. Tighten the locknut.
When the valve section has been tested and adjusted, stop the engine. Remove the pressure gauge. Install the guard on the right side of the machine.