TM 10-3930-641-34-1
STEERING SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
20. PERCENT OF FLOW LOSS IS 10% OR MORE FOR TEST 8. FLOW DIFFERENTIAL FOR TEST 8 IS MORE THAN 0 GPM FOR TEST 10. TEST 11 THRU
18 HAVE SAME FLOW DIFFERENTIAL.
Tests 8, 10, and 11 thru 18. (See page 6-74.)
Step 1. Fill hydraulic tank.
Step 2. Drain system and fill with correct oil.
Step 3. Repair air leaks.
Step 4. Repair or replace pump. Check for correct assembly.
21. FLOW DIFFERENTIAL FOR EACH OF THE TESTS 11 THRU 18 SUDDENLY BECOMES LOWER AT ONE TEST AND THE FLOW RATE IS THE SAME
FOR THE REMAINING TESTS. FOR EXAMPLE: 11 AND 12 ARE WITHIN 1 GPM, BUT 13 IS 8 GPM LESS THAN 12, AND 13, 14, 15, 16, 17, AND 18 ARE
WITHIN 1 GPM OF EACH OTHER.
Tests 11 thru 18. (See page 6-74.)
Correct the source of pump cavitation; a restriction in the suction line.
22. LEAKAGE IN VALVES.
Test 20 and 21. (See page 6-74.)
Step 1. Clean or repair relief valve.
Step 2. Replace steering valve body or spool.
Step 3. Repair or replace hand metering unit.
Step 4. Repair or replace diverter valve.
23. LEAKAGE IN EITHER THE LEFT CYLINDER OR THE RIGHT CYLINDER.
Tests 20, 24, 4. (See page 6-74.)
Step 1. Replace piston seals.
Step 2. Tighten piston nut.
Step 3. Replace cylinder.
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