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MAIN WINCH CIRCUIT (MAIN HYDRAULIC SYSTEM) - TM-9-2350-256-34-2_44
LEVELWINDER NOT OPERATING

TM-9-2350-256-34-2 Recovery Vehicle Full Tracked; Medium M88A1 (NSN 2350-00-122-6826) Manual
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TM 9-2350-256-34-2 Table 2-3.  Troubleshooting-Continued MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION MAIN WINCH CIRCUIT (MAIN HYDRAULIC SYSTEM)-Continued WARNING Test components must be capable of withstanding a working pressure of 1950-2050 psi.  (Step 2 only). NOTE After performing main hydraulic pump test, return all plumbing to original configuration. Step 2. Test main hydraulic pump.  Remove check valve and tee between hose no.  4A and4B.  Install main hydraulic pump pressure tester kit (Item 14, Table 2-1) between hose no.  4A and hose no.  4B.   Install test pressure gage in tee. CAUTION Make  sure  that  the  load  valve  is  in  full  open  position  before  performing  test.    When performing main hydraulic pump pressure test, do not restrict oil flow beyond operating pressure. With main engine operating at 1800 rpm.  operating pressure should be 1950-2050 psi when restricting flow using  load valve. After testing,  remove hose no.  4B from pump port no.  1.  Remove pilot-operated relief and unloading valve assembly from pump port no.  44.  Install hose no.-4B on pump port no.-44. With main engine operating at 1800 rpm.  operating pressure should be 1950--2050 psi when restricting flow using load valve. a. Remove mechanical transmission and main hydraulic pump assembly.  Refer to TM 9-2350-256- 341-1.  Medium Recovery Vehicle, M88A81. b. Replace main hydraulic pump  Refer to paragraph 3-16. Step 3. Inspect system selector valve lever for improper position.  Place system selector valve lever in MAIN Position. Change 5  2-8







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