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 TM 55-1905-223-24-10
WARNING
Ensure that all personnel are clear of the winch, wire ropes, sheaves, chains, chain stoppers,
wildcats, ramp, and ramp hinges before operating the bow ramp assembly to raise or lower the
ramp. Notify operations personnel before starting the bow ramp assembly.
Electrical components contain high voltages that can cause severe injury or death. Before
servicing, adjusting, or replacing electrical components, disconnect the power supply to the
electric motor in the hydraulic power pack assembly.
Hydraulic fluid contains chemical compounds that cause irritation or injury to skin and eyes.
Wear protective clothing, gloves, and eye protection when working in the vicinity of hydraulic
equipment.
Table 2-2 lists the common fault conditions that may be found during operation or maintenance of the equipment. Look
for causes and do corrective actions in the order listed. This manual cannot list every symptom that may show up, and it
cannot list all of the possible causes and corrective actions. If a symptom is not listed, or if it keeps up after you have
performed the corrective actions, notify your supervisor.
Table 2-2. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
No pressure in hydraulic system.
STEP 1. After starting unit and allowing warm-up time, pressure gage (18) should read 10 psi. If the gage reads
in excess of 20 psi the filter element (17) should be replaced.
STEP 2. Check for loss of power.
Energize.
STEP 3. Check for low hydraulic level in reservoir tank.
a.
Check hydraulic fluid level indicator (PMCS, Item 3).
b.
Check hydraulic system for leaks. Add hydraulic fluid (paragraph 2-5a).
STEP 4. Check to see if suction strainer elements are dirty.
Clean or replace suction elements (PMCS, Item 13).
STEP 5. Check for pressure relief valve malfunction.
a.
If valve pressure setting is incorrect, reset valve pressure to specification.
Change 1
2-19
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