TM 9-2320-272-24-3
4-123. POWER STEERING TESTS AND ADJUSTMENT (ROSS)
THIS TASK COVERS:
c. Steering Gear Internal Leakage Test
a. Steering Pump Pressure Test
d. Poppet Adjustment
b. Steering Pump Flow Test
INITIAL SETUP:
EQUIPMENT CONDITION
APPLICABLE MODELS
Parking brake set (TM 9-2320-272-10).
All
Power steering test equipment installed
TOOLS
Power steering reservoir filled to proper oil level
General mechanic's tool kit (Appendix E, Item 1)
(LO 9-2320-272-121.
REFERENCES (TM)
GENERAL SAFETY INSTRUCTIONS
LO 9-2320-272-12
Personnel must be clear of vehicle when vehicle
TM 9-2320-272-10
engine is running.
TM 9-2320-272-24P
WARNING
Personnel must be clear of vehicle when vehicle engine is
running. Vehicle could suddenly move and cause injury
to personnel and/or damage equipment.
1.
Start engine and warm up to operating temperature (TM 9-2320-272-10).
CAUTION
Never allow power steering oil temperature to exceed 180F
(82C). Run all tests at the prescribed temperature range of
125-135F (52-57C).
2.
Partially close load shutoff valve (2) until pressure gauge reads 1,000 psi (6,895 kPa).
3.
Observe temperature reading on thermometer in power steering pump reservoir (1). Temperature
must be between 125-135F (52-57C).
CAUTION
Do not keep the load valve closed for longer than 5 seconds to
avoid damaging pump.
Closing load valve causes pump to operate at relief pressure,
resulting in rapidly increasing power steering oil temperature.
4.
Open load shutoff valve (2).
5.
Close load shutoff valve (2) and observe pressure gauge reading. If gauge reads below
1,360-1,440 psi (9,377-9,929 kPa), repair or replace pump (3).
6.
Open shutoff valve (2).
4-660
