POWER STEERING PUMP NOT DELIVERING OIL

TM 9-2320-285-24-2

3-27. STEERING SYSTEM TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

9. LOST MOTION AT STEERING WHEEL (Cont)

Step 5.

Check power steering gear adjustments.

a. If power steering gear is not properly adjusted, adjust (para

b. If power steering gear is properly adjusted, overhaul or replace

power steering gear (para 3-28d).

10. POWER STEERING PUMP NOT DELIVERING OIL

Step 1.

Remove control valve assembly from power steering pump (para 3-28f).

Clean control valve (para 3-28f).

Install control valve in bore and slide back and forth.

Check if control valve sticks in bore.

a. If control valve is sticking and a gritty feeling is noted on

valve outer diameter, polish with crocus cloth (avoid removal of

excess material or rounding of valve edges during this

operation). If control valve continues to stick, replace (para

b. If control valve does not stick, reinstall control valve

assembly (para 3-28f). Then proceed to step 2 below.

Step 2.

Remove power steering pump (para 3-28f).

Check gear and coupling for damage, wear, or missing teeth.

a. If gear or coupling is damaged, worn, or teeth missing, replace

b. If gear and coupling are not damaged or worn and teeth are not

missing, proceed to step 3 below.

Step 3.

Check power steering pump key and shaft for damage or wear.

a. If key or shaft are damaged or worn, replace (para 3-28f).

b. If key and shaft are not damaged or worn, proceed to step 4

below.

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