TM 9-2350-256-34-2Table 2-3. Troubleshooting-ContinuedMALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONMAIN WINCH CIRCUIT (MAIN HYDRAULIC SYSTEM)-Continued2.MAIN WINCH PAYS IN BUT WILL NOT PAY OUTStep 1.Remove main winch brake cover. Refer to TM 9-2350-256-34-1, Medium Recovery Vehicle, M88A1, anti check if main winch brake is releasing.Adjust brake. Refer to TM 9-2350-256-20, Medium Recovery Vehicle, M8A1.Step 2.Remove hydraulic brake cylinder hose no. 29 and inspect for restriction.Replace restricted or damaged hose. Refer to TM 9-2350-256-20, Medium Recovery Vehicle, M88SA1.Step 3.Remove main winch brake cylinder and test for malfunction. Refer to TM 9-2350-256-34-1, Medium Recovery Vehicle, M88A1.Replace main winch brake cylinder.3.MAIN WINCH PAYS OUT BUT WILL NOT PAY INStep 1.Inspect for restricted pilot hose between main winch control valve and combination control valve. Refer to fig. FO-3 and trace pilot circuit.Replace restricted or damaged pilot hose. Refer to TM 9-2350-256-20, Medium Recovery Vehicle, M88A1.Step 2.Broken free-wheeling ratchet bracket assemble unit in main winch.a.Remove main winch and spade assembly. Refer to TM 9-2350-256-34-1, Medium Recovery Vehicle, MS8A1.b.Replace main winch. Refer to paragraph 3-6.4. MAIN WINCH CREEPS IN EITHER DIRECTION WHEN IN HOLD POSITIONStep 1.Inspect for restricted pilot hose or main control valve. Refer to figs. FO-2 and FO-3 and trace hose and valve for restriction.a.Replace any restricted pilot hose. Refer to TM 9-2350-256-20, Medium Recovery Vehicle. MS8A1.b.Remove restriction or replace control valve. Refer to TM 9-2350-256-34-1, Medium Recovery Vehicle M88ANOTEIn cold weather, oil viscosity increases, causing a retarded flow of oil andpossibly causing main winch to creep. Proper warmup will correct.5.MAIN WINCH WILL NOT HOLD LOADStep 1.Inspect main winch brake for proper adjustment.Adjust main winch brake. Refer to TM 9-2350-256-20), Medium Recovery Vehicle, 1MtSA1.Step 2.Remove main winch brake cover and inspect for worn brake lining. Refer to TM 9-2350-256-34-1, Medium Recover Vehicle. M88A1.6. INSUFFICIENT MAIN SYSTEM OIL PRESSUREStep 1.Test mechanical transmission clutch pressure. Install pressure gage in mechanical transmission clutch pressure hose. For location, refer to TM 9-2350-256-20, Medium Recovery Vehicle, MI88A1. With engine operating at 1800 rpm, and power control valve lever in ON position, normal operating pressure is150-10 psi.a.Remove mechanical transmission anti main hydraulic pump assembly. Refer to TM 9-2350-256-34-1, Medium Recover Vehicle, M88AI.b.Replace mechanical transmission. Refer to paragraph 3.16.Change 5 2-7
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