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FRONT LOADER WILL NOT RAISE OR LOWER.
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TM-5-2420-224-20-1 Tractor Wheeled 4x4 DED Small Emplacement Excavator (SEE) and High Mobility Material Handler (HMMH) Manual
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LOADER BOOM CYLINDER DRIFTS. cont'd -680640450
TM 5-2420-224-20-1
Table 3-5. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
FRONT LOADER (SEE) (CONT)
Set hand throttle to 1200 rpm and depress button on solenoid (1) of control valve (2).
If front loader lowers, perform Malfunction 77.
If front loader does not lower, notify direct support maintenance.
141. FRONT LOADER WILL NOT RAISE USING BUCKET SWITCH.
Set hand throttle to 1200 rpm and depress button on solenoid (3) of oontrol valve (2).
If front loader raises, perform Malfunction 77.
If front loader does not raise, notify direct support maintenance.
142. LOADER BOOM CYLINDER DRIFTS.
NOTE
Steps 1 and 2 are the same for both loader boom cylinders.
Step 1. Check for loose and damaged hydraulic lines.
If hydraulic lines are loose or damaged, tighten loose
connections or replace hydraulic lines (pages 4-569, 4-572).
If hydraulic lines are not loose or damaged, go to step 2.
Step 2. Check for damaged loader boom cylinder packing as follows:
a. Start engine. Place front loader in fully raised position.
b. Stop engine.
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