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 TM 55-1905-223-24-10
Table 2-2. Troubleshooting - Con't
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
STEP 2.
Check for air in hydraulic fluid.
a.
Secure inlet fittings.
b.
Check hydraulic fluid level (PMCS, Item 3).
c.
Bleed air from hydraulic system (paragraph 2-5).
STEP 3.
Check to see if drive coupling is misaligned.
Align drive coupling (paragraph 2-14).
STEP 4.
Check for worn or damaged hydraulic pump.
Replace hydraulic pump (paragraph 2-15).
9.
Excessive wear of hydraulic pump parts.
STEP 1.
Check to see if drive coupling is misaligned.
Align drive coupling ( paragraph 2-14).
STEP 2.
Check to see if air recirculation is causing chatter in hydraulic system.
a.
Secure inlet fittings.
b.
Check hydraulic fluid level (PMCS, Item 3).
STEP 3.
Check for abrasive material in hydraulic fluid.
a.
Clean or replace dirty filters and elements (paragraph 2-13).
b.
Change hydraulic fluid (PMCS, Item 6).
STEP 4.
Check to see if viscosity of hydraulic fluid is too low for working conditions.
Check recommendations for hydraulic fluid.
10.
Breakage of inside hydrau lic pump housing.
STEP 1.
Hydraulic pump seizure due to lack of hydraulic fluid.
Check hydraulic fluid level (PMCS, Item 3).
11.
External hydraulic fluid leakage around hydraulic pump shaft or housing.
STEP 1.
Check for worn hydraulic pump shaft or housing.
Replace hydraulic pump (paragraph 2-15).
STEP 2.
Check for worn hydraulic pump head seals.
Replace hydraulic pump (paragraph 2-15).
STEP 3.
Check for excessive hydraulic fluid pressure due to excessive drain flow.
Replace hydraulic motor (paragraph 2-22).
2-23
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