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Figure 10. Status Group #11.
LEVELING VALVE FAILS TO LOCK DOWN AUTOMATICALLY WHEN ENGINE IS STOPPED

Field Maintenance Manual For Military 621G Scraper -2 Page Navigation
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TM 5-3805-296-23-2
0126
Table 1. Load Cylinder Rod Does Not Extend Fully Continued.
0126
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Load Cylinder Rod Does Not
8. Read pressure on gauge
Pressure as Specified Have
Extend Fully Continued
(Figure 5, Item 1). Pressure must
assistant release throttle lock and return
be 2,250 to 2,410 psi (15,520 to
engine speed to idle
16,620 kPa).
(TM 5-3805-296-10).
Have assistant turn ignition switch and
battery disconnect switch to OFF
position (TM 5-3805-296-10).
Remove test equipment.
Proceed to Test Step 7.
Pressure Not as Specified Have
assistant release throttle lock and return
engine speed to idle
(TM 5-3805-296-10).
Have assistant turn ignition switch and
battery disconnect switch to OFF
position (TM 5-3805-296-10).
Remove test equipment.
Replace cushion-hitch pump
(WP 0281).
Proceed to Test Step 6.
Test Step 6. Test Cushion Hitch
Operation.
Verify correct operation of cushion
Load Cylinder Rod Extends Fully
hitch (TM 5-3805-296-10).
Troubleshooting complete.
Load Cylinder Rod Fails to Extend
Fully Replace leveling valve
(WP 0405).
Proceed to Test Step 7.
Test Step 7. Verify Malfunction is
Resolved.
Verify correct operation of cushion
Load Cylinder Rod Extends Fully
hitch (TM 5-3805-296-10).
Troubleshooting complete.
Load Cylinder Rod Fails to Extend
Fully Repeat troubleshooting from the
beginning.
END OF WORK PACKAGE
0126-15/(16 blank)


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