CAGE AS 1869320 - Caterpillar

Move the machine to a clear area that is level. Lower the implements to the ground. Engage the parking brake. Stop the engine.
Start the engine and run the engine at high idle.
Place the main display in the operator station in Service Mode of operation in order to monitor the engine rpm.
Record the engine rpm at high idle.
Release the parking brake and engage the service brakes. Move the tiller handle to the MID STEER LEFT POSITION and to the MID STEER RIGHT POSITION. Record the engine rpm at each position.
If both of the readings from Step 5 are more than 50 rpm different from the reading in Step 4, then the main relief valve or the crossover relief valves may have low pressure settings.If one reading from Step 5 is more than 50 rpm different from the reading in Step 4, then one of the crossover relief valves has a low pressure setting. The makeup valve in the steering control valve may also be leaking.
Illustration 1 g01234954
(1) Main Relief Valve
Steps 7 and 8 determine whether the main relief valve or both crossover relief valves have low pressure settings. Turn the adjustment screw for the main relief valve by 45 degrees clockwise. Repeat Step 5.
Illustration 2 g01234953
Counterbalance valve (2) Crossover relief valve for left turn (3) Crossover relief valve for right turn
If both of the readings from Step 5 are less than 50 rpm different from the reading in Step 4, then the main relief valve must be replaced or adjusted on a test bench.If both of the readings from Step 5 are more than 50 rpm different from the reading in Step 4, then the main relief valve must be replaced or inspected. Repeat Step 5. If both of the readings remain more than 50 rpm different from the rpm at high idle, then the crossover relief valves must be replaced or inspected.When the rpm reading for only one of the movements to either the MID STEER RIGHT POSITION or the MID STEER LEFT POSITION is more than 50 rpm from the rpm at high idle, exchange the crossover relief valves. Repeat Step 5. If the rpm reading does not improve and the reading is on the same side as the first reading that was taken, the result is due to internal leakage in either the crossover relief valve or the main control valve.When the rpm reading for the MID STEER LEFT POSITION is over 50 rpm from the rpm at high idle, crossover relief valve (2) must be replaced. The crossover relief valve may be adjusted on a test bench. Valve (2) is located toward the left side of the machine.When the rpm reading for the MID STEER RIGHT POSITION is over 50 rpm from the rpm at high idle, crossover relief valve (3) must be replaced. The crossover relief valve may be adjusted on a test bench. Valve (3) is located toward the right side of the machine.
Turn the adjustment screw for the main relief valve by 45 degrees