TM 5-3805-261-23-1
HYDRAULIC SYSTEM TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
Check the hydraulic hoses for leaks
If a hydraulic hose fitting is loose, tighten.
1.
All Implements Fail to
and loose fittings.
Operate or Operate
If a hose is damaged or defective, replace
Slowly.
problem still exists, go to Test 2.
2.
Check the hydraulic filters.
If the filters are clogged, damaged, or
defective, replace (WP 0231 00). If the
problem still exists, go to Test 3.
3.
Check the hydraulic pump assembly.
If the hydraulic pump assembly is
damaged or defective, replace (WP 0329
00).
1.
Check the circle drive hydraulic
If a circle drive fitting is loose, tighten. If
2.
Circle Drive Operates
hoses for leaks and loose fittings.
Slowly or Fails to Operate.
hose is damaged or defective, replace
go to Test 2.
2.
Check hydraulic system pressures at
If the problem still exists, go to Test 3.
control valve (WP 0237 00).
3.
Measure circle drive operation time.
The time for one quarter revolution in
Using a stop watch, measure the
either direction is 9.5 to 11.5 seconds. If
amount of time for one quarter
the time recorded is not within the range,
revolution.
replace circle drive motor (WP 0217 00).
1.
Check the blade float hydraulic hoses
If a blade float fitting is loose, tighten. If
3.
Blade Float Fails to
for leaks and loose fittings.
Operate Properly (CCE
a hose is damaged or defective, replace
Machine).
go to Test 2.
2.
Check to see if it is one or both sides
1.
If both sides of the blade float do not
of the blade that do not float.
operate, replace blade float pilot
valve (WP 0233 00).
2.
If one side of the blade float does not
operate, replace blade float check
valve (WP 0234 00).
1.
Check the blade lift hydraulic hoses
If a blade lift fitting is loose, tighten. If a
4.
Blade Lift Fails to Operate
for leaks and loose fittings.
Properly.
hose is damaged or defective, replace
go to Test 2.
2.
Measure blade lift time. Using a stop
The time for the blade to be lifted is 0.5 to
watch, measure the amount of time
9.5 seconds. If the time is not within
for the blade to be listed from the
range, replace hydraulic pump (WP 0329
ground to the stopping point.
00). If the problem still exists, go to Test 3.
3.
Check blade lift cylinder for leaks
Replace if leaking or damaged (WP 0245
and damage.
