TM 5-3805-290-23-1
TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
0008 00
Table 7. Hydraulic System Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. Drain hydraulic tank (WP 0137 00) and 1. Clean screen or replace pump as
2.
No Functions Will Operate
necessary.
inspect inlet screen on implement
or All functions Operate
pump for contamination (WP 0182 00). 2. If problem still exists, go to Test 7.
Slowly - Continued.
7. Check signal limiter valve adjustment.
1. Adjust signal limiter valve if necessary.
Refer to Piston Pump Pressure Test
2. If problem still exists, replace pilot
and Adjustment (WP 0017 00).
operated control (WP 0188 00).
3. If problem still exists, replace main
control valve (WP 0189 00).
4. If problem still exists, replace cylinders
(WP 0128 00 and WP 0129 00).
1. Check setting for pressure reducing
1. Adjust as necessary.
3.
Pilot Oil Pressure is Low.
valve. Refer to Pilot System Pressure
2. If problem still exists, go to Test 2.
Test (WP 0017 00).
2. Steering pump pressure for low
If problem still exists, go to Test 3.
pressure standby pressure is not
correct. Perform Piston Pump
(Steering and Pilot Oil) Low Pressure
Standby Test and Adjustment (WP
3. Signal drain valve is not functioning
1. Replace main control valve (WP 0189
correctly.
00).
2. If problem still exists, go to test 4.
4. Pressure reducing valve is
Loosen adjusting screw on pressure
reducing valve and turn screw inward (WP
contaminated.
1. Check hydraulic oil for correct oil
1. Add or change oil if necessary (WP
4.
Piston Pump for Work
0121 00).
viscosity or grade (WP 0019 00),
Tools Will Not Reach High
2. If problem still exists, go to Test 2.
contamination, and correct level (TM
Pressure Cutoff.
2. Check for air in oil.
1. If air is present, refer to Malfunction
11, There Are Air Bubbles in Oil in this
work package.
2. If problem still exists, go to Test 3.
3. Cutoff spool is stuck.
1. Loosen cutoff spool adjusting screw
and attempt to readjust high pressure
cutoff. Refer to Piston Pump Pressure
Test and Adjustment (WP 0017 00).
2. If problem still exists, replace main
control valve (WP 0189 00).
3. If problem still exists, replace
implement pump (WP 0182 00).
Spring or margin spool is damaged.
If problem still exists, replace implement
5.
Standby Pressure Cannot
pump (WP 0182 00).
be Adjusted Correctly.
