PLATE AS 4657705 - Caterpillar

Ensure that the engine is operating in low idle. The high idle indicator light should be off. If this indicator is illuminated, press throttle control button (11) to operate the engine in low idle.
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Move engine start switch (12) to the OFF position.
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Unhook latch (13). Open left compartment door (14), and install the door prop.
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Remove cap (16), and connect one Tool (A2) to the pressure tap in port "MB" (15).
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Remove cap (17), and connect one Tool (A2) to the pressure tap in port "MA" (18).
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Unhook latch (19). Open compartment door (20) under the instrument panel.
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Loosen lock wheel (22), and rotate needle valve (21) clockwise to close the valve.
Chock the wheels or tracks.Test Procedure
Move engine start switch (12) to the START position. Release the switch when the engine starts.
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Use travel mode button (23) to set the machine to roading mode. The indicator next to the button illuminates when the machine is in the roading mode.
Use throttle control button (11) to operate the engine in high idle.
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Monitor the hydraulic oil temperature on operator display (24). Operate the machine until the oil temperature reaches the test temperature listed in the "Specifications" section.
Illustration 18 g06229257Note: If the machine moves during the next steps, immediately return the machine to neutral. Repair the brakes before this test is continued.
Press interlock button (25), and slowly move propel lever (1) into the FULL FORWARD position.
Allow the pressure to stabilize. Read the pressure shown on Tool (A) at port "MB" (15).
Move propel lever (1) into the FULL REVERSE position to place the machine in neutral. Release the propel lever.
Press interlock button (25), and slowly move propel lever (1) into the FULL REVERSE position.
Allow the pressure to stabilize. Read the pressure shown on Tool (A) at port "MA" (18).
Move propel lever (1) into the FULL FORWARD position to place the machine in neutral. Release the propel lever.
Use throttle control button (11) to operate the engine in low idle.
Move engine start switch (12) to the OFF position.
Compare the recorded pressure readings to the pressure specifications listed in the "Specifications" section. If either pressure reading is outside the specified range, perform the "Adjustment Procedure". If both pressure readings are inside the specified range, go to the next step.
Rotate needle valve (21) counterclockwise to open the valve. Tighten lock wheel (22).
Close compartment door (20) under the instrument panel. Secure the door with latch (19).
Remove one Tool (A2) from the pressure tap in port "MB" (15) and Install cap (16) on the pressure tap.
Remove one Tool (A2) from the pressure tap in port "MA" (18) and Install cap (17) on the pressure tap.
Place the door prop in the stored position and close left compartment door (14). Secure latch (13).Adjustment Procedure
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(26) Forward relief valve
(27) Reverse relief valve
Locate the relief valve to be adjusted. Relief valve (26) is the forward relief valve. Relief valve (27) is the reverse relief valve.
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Hold