TM 9-2350-256-20 CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS2 - 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 dD R I V E R ’ S C O N T R O L S - C o n t i n u e dL Disconnect fuel line from OUT side of purge pump.Place a container under purge pump. Turn MASTERswitch to on position and operate purge pump. Ifpurge pump cannot be operated or excessivepressure is required to operate purge pump, replacepurge pump (see paragraph 4-9).To prevent injury to personnel or damage toequipment, chock vehicle (see paragraph17-9).M Place transmission shift lever in neutral position.Turn MASTER switch and fuel pump switches toON position, press starter button and preheat buttonlocated on purge pump handle. If purge pumpoperates with no excessive pressure, replace mainengine fuel check valve (see paragraph 4-13).T R A C K S A N D S U S P E N S I O NSYMPTOMSVehicle pulls to one side. (Thiscondition is normal on a crownedroad. The vehicle will pull to thelow side of the road.)Do steps B through E.vehicle throws track.Do steps A through C.Vehicle sags to one side.Do steps B, C, and E.Vehicle rides excessively hard.Do steps E and G.Thumping noises heard duringvehicle operation.Do steps H and I.Excessive noise in track orsuspension during vehicleoperation.Do steps A through C and F.A Inspect tracks for foreign material lodged in track orbetween roadwheels and support rollers. Removeforeign material from tracks, roadwheels, andsupport rollers.B Inspect tracks for damaged end connectors andcenter guides. Inspect track shoes for separation ofrubber from metal tubes, inspect track for dead trackshoes and for shoes with chunked rubber or rubberworn down to metal tubes. Replace worn, missing,or damaged parts (refer to TM 9-2350-256-10).C Check track tension and adjust if necessary (refer toTM 9-2350-256-10).2-40.14 Change 1
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