TM-9-2320-260-34-2
TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; VOLUME 2 OF 2
JULY 1994
TM-9-2320-260-34-2 - Page 13 of 863
12-6. POWER STEERING TEST AND ADJUSTMENT (Contd)
I
b. Steering Pump Pressure Test
1. Start engine (TM 9-2320-260-10) and warm engine to operating temperature. Let engine run at idle
until end of test.
CAUTION
Power steering oil temperature cannot exceed 200°F (93°C).
Damage to equipment may result.
2. Partially close load shutoff valve (2) until gage reads 1000 psi (6895 kPa).
3. Observe temperature reading on thermometer. Temperature must be 165°- 175°F (74°-79°C).
If temperature reading is not between 165°- 175°F (74°-79°C), refer to Chapter 2, Mechanical
Troubleshooting, Steering Gear.
4. Fully open load shutoff valve (2).
CAUTION
Do not keep load shutoff valve closed for more than 5 seconds.
Failure to do so may result in damage to power steering pump.
5. Close load shutoff valve (2) and observe gage. Replace pump (1) if gage reads below 1250 psi
(8619 kPa) (TM 9-2320-260-20).
6. Open load shutoff valve (2).
7. Shut down engine (TM 9-2320-260-10).
c. Steering Pump
Flow Test
1.
2.
3.
4.
5.
6.
7.
8.
9.
12-8
Start engine (TM 9-2320-260-10) and warm engine to operating temperature. Engine at idle.
CAUTION
Power steering gear oil temperature cannot exceed 200°F (93°C).
Damage to equipment may result.
With engine idling, observe temperature reading on thermometer. Temperature must be 165°-175°F
(74°-79°C). If temperature reading is not between 165°- 175°F (74°-79°C), refer to Chapter 2,
Mechanical Troubleshooting, Steering Gear.
Observe flow rate on flowmeter. Replace pump (1) if flowmeter reads below 4.3 gpm (16.3 lpm)
(TM 9-2320-260-20).
CAUTION
Do not keep load shutoff valve closed for more than 5 seconds.
Failure to do so may result in damage to power steering pump.
Close load shutoff valve (2) and observe reading on gage and flowmeter. Gage should read 1250 psi
(8619 kPa). Flowmeter should read zero. Replace pump (1) if gage reads below 1250 psi (8619 kPa)
(TM 9-2320-260-20).
Open load shutoff valve (2) and observe flowmeter. Replace pump (1) if flow rate is below 4.3 gpm
(16.3 lpm) (TM 9-2320-260-20).
Run engine at 3000 rpm.
Close load shutoff valve (2) and observe gage and flowmeter. Gage should read 1525 psi (10514 kPa).
Flowmeter should read zero. Replace pump (1) if gage reads above 1525 psi (10514 kPa)
(TM 9-2320-260-20).
Open load shutoff valve (2) and observe flowmeter. Replace pump (1) if flow rate is below 8 gpm
(30.3 lpm) (TM 9-2320-260-20).
Shut down engine (TM 9-2320-260-10).
TM 9-2320-260-34-2
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