TM 5-3895-373-34
Table 2-6. Hopper Lift System Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
HOPPER FAILS TO OPERATE.
WARNING
Hydraulic oil can be moderately flammable and can be an irritant to skin, eyes, and
respiratory system. Avoid prolonged exposure. Eye protection and rubber gloves
must be worn when working with hydraulic oil.
Step 1.
Open right access door per TM 5-3895-373-10. Install hydraulic system tester at outlet (1) for flow
test per TM 9-4940-468-14. Check flow rate at power-beyond valve outlet (I) with hopper wing lift in
operation. Measure flow rate at 2475 +25 psi (17 066 +172 kPa).
If flow is present, at 2475 ±25 psi (17 066 ±172 kPa) replace power-beyond valve. Refer to paragraph 2.44.
Step 2.
Install hydraulic system tester at outlet (2) for flow test per TM 9-4940-468-14. Check flow rate at
stack valve outlet (2) to return manifold with hopper wing lift in operation.
If flow is present below 2450 psi (16 893 kPa), replace stack relief valve per paragraph 2.44.
If no flow is present below 2450 psi (16 893 kPa), refer to MALFUNCTION 4. AUXILIARY
HYDRAULIC SUPPLY TO VIBRATION AND CYLINDER CIRCUITS FAULTY.
Step 3.
Disconnect hydraulic system tester per TM 9-4940-468-14. Reconnect all hydraulic lines. Close
right access door per TM 5-3895-373-10.
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