TM 5-3805-298-23-2
0166
PRESSURE REDUCING RELIEF VALVE ADJUSTMENT
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1. Loosen locknut (Figure 39, Item 1) and adjust screw (Figure 39, Item 2) clockwise to increase pilot supply
pressure or counterclockwise to decrease pilot supply pressure.
2. Perform Pilot System Pressure Test steps 8 through 13.
Figure 39. Pilot Supply Pressure Connection.
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END OF TASK
RELIEF VALVE PRESSURE FOR HEAD END TILT CYLINDER TEST
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WARNING
DO NOT disconnect or remove any hydraulic system line or fitting unless engine is shut
down and hydraulic system pressure has been relieved. Tighten all connections before
applying pressure. Escaping hydraulic fluid under pressure can penetrate the skin,
causing injury to personnel.
At operating temperature, hydraulic oil is hot. Allow hydraulic oil to cool before removing
any hydraulic fitting.
To prevent injury to personnel, wear protective eye covering and gloves.
Sudden movement of machine can cause injury to personnel on or near the machine.
Failure to follow these warnings may result in injury to personnel.
CAUTION
When servicing this machine, performing maintenance, or disposing of hazardous
materials, consult your unit/local hazardous waste disposal center or safety office for local
regulatory guidance. If further information is needed, please contact the Army
Environmental Hotline at 1-800-327-3845.
Do not perform this procedure unless directed here from troubleshooting or a repair
procedure. Failure to follow this caution may result in an improper diagnosis.
