T M 9 - 2 3 5 0 - 2 5 6 - 2 0 CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTlONS2 - 1 6 . 1 M E C H A N I C A L T R O U B L E S H O O T I N G - C o n t i n u e dM E C H A N I C A L T R A N S M I S S I O N - C o n t i n u e dB Have assistant start engine. Observe power takeoffcoupling and drive shaft. If the power takeoffcoupling and drive shaft are not turning, turn offengine and remove powerplant (see paragraph 3-l).Install holding bar and pulley (Appendix B, item 21)and tighten power takeoff retaining nut. Torque nutto 240-250) lb-ft (325-339 N•m). Reinstall powerplant(see paragraph 3-1).C Remove rear center subfloor plate (see paragraph 9-17). Remove pipe plug in mechanical transmission(see paragraph 2-15) and perform STE-ICE-R test 50(pressure gage optional) (Appendix B, items 153 and160). Lubricating oil pressure should be 10-19 psi(69-131 kPa). If lubricating oil pressure is not 10-19Psi (69-131 kPa), notify Direct Support Maintenance.D Disconnect hydraulic line (see paragraph 12-2).Install tee and perform STE/ICE-R test 50 (pressuregage optional) (Appendix B, items 153 and 160).Connect hydraulic line. Operate engine at 1600 rpm.Mechanical transmission clutch operating pressureshould be 140-225 psi (965-1551 kPa). If clutchpressure is not 140-225 psi (965-1551 kPa), notifyDirect Support Maintenance.2 - 1 7 H Y D R A U L I C T R O U B L E S H O O T I N GM A I N W I N C HSYMPTOMSMain winch fails to operate.Do steps A through J.Main winch creeps with control in neutral or winchbrake falls to hold load.Do steps K and L.Maim winch operates with difficulty. Main winch level winder fails to traverse.Do steps B through J. Do steps M and N.NOTEThe main winch troubleshooting proceduresare performed using the main hydraulicsystem as a fluid power source. If mainwinch operates using the main hydraulic butnot the auxiliary hydraulic, troubleshootauxiliary hydraulic system. If main winchoperate; using the aixiliary hydraulic butnot the main hydraulic, troubleshoot mainhydraulic system.2-40.16 Change 1
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