TM 9-2350-256-20CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTlONS2-17 HYDRAULIC TROUBLESHOOTING-ContinuedMAIN WINCH-Continuednotify Direct Support Maintenance. If no leaks existgo to step H.H Test main winch combination control valve byperforming STE/ICE-R test No. 51 with 0-10,000psig pressure transducer (Appendix C, item 51)installed in test gage port No. 50 at main winch levelcylinder. Remove hose No. 21A from valve, and plugoutlet of valve (see paragraph 12-2). If no pressure isindicated on gage when operating hydraulic system,it indicates a faulty combination control valve. Ifcombination control valve is faulty, notify DirectSupport Maintenance. If combination control valveis not faulty go to step I.ITest the main winch control valve by performingSTE/ICE-R test No. 51 with 0-10,000 psig pressuretransducer (Appendix C, item 51) installed incombination control valve port No. 7. If no pressureis established when actuating control valve, butpressure is established when removing hose No. 21Afrom control valve and plugging outlet, a faultymain winch control valve is indicated. If mainwinch control valve is faulty, notify. Direct Supportmaintenance. If main winch control valve is notfaulty, go to step J.JIf main winch still does not operate or operates withdifficulty,troubleshoot main hydraulic systemand/or auxiliary hydraulic system (see paragraph2-19). If main winch operates properly, but creeps orfails to hold load, go to step K.NOTEEnsure hydraulic system is at operatingtemperature.K If main winch creeps or fails to hold load, adjustbrake. Open door of hydraulic valve forward rightfloor plate (see paragraph 9-3). Loosen locknut (seeparagraph 11-2) and tighten main winch adjustingscrew clockwise as far as it will go.Back offadjusting screw one full turn. Hold adjusting screwin position and tighten locknut. If brake fails to holdload or creeps, go to step L.LRemove hydraulic brake cylinder hose No. 29 andinspect for restriction (see paragraph 12-1). Replace2-42Change 1
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business