TM 5-3805-262-34
2-16. HYDRAULIC SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. HYDRAULIC SYSTEM OIL TOO HOT (Cont).
Step 6.
Check circuit relief valves pressure setting (page 3-624).
a. If pressure setting is not 2550 to 2950 psi, adjust (page
3-624).
b. If pressure setting is 2550 to 2950 psi, perform flowmeter test
(page 3-627). If flowmeter tests are not acceptable, and problem
was in a loader circuit, refer to Malfunction 1 or 2 (page
2-123). If problem was in loader section of hydraulic pump,
replace hydraulic pump (page 3-612).
6. A HYDRAULIC CONTROL LEVER DOES NOT RETURN TO NEUTRAL.
Step 1.
Remove control valve assembly if not already removed (page 3-647).
Remove spool associated with control lever (page 3-661, 3-672, or
3-682). -
Check springs
3-667, 3-677,
a. If springs
3-686) .
b. If springs
for wear or damage. Test using spring gage (page
or 3-685).
are damaged or worn replace (page 3-668, 3-679, or
are okay, go to step 2 below.
Step 2.
Check spool for bent condition (page 3-667, 3-677, or 3-685).
a. If spool is bent, replace entire control valve assembly.
b. If spool is okay, go to step 3 below.
Step 3.
Check spool bore in control valve assembly housing for damage.
a. If spool bore in housing is damaged, replace entire control
valve assembly.
b. If spool bore in housing is okay, go to step 4 below.
Step 4.
Take a sample of oil from hydraulic reservoir.
Check if hydraulic oil is contaminated by water.
a. If hydraulic oil is contaminated by water, flush water from hy-
draulic system (page 3-757).
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