TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM9-2815-202-34 4-25. IDLER GEAR REPLACEMENT This task covers: a. Removal b. Disassembly c. Cleaning/Inspection d. Assembly e. Installation INITIAL SETUP MODELS All TOOLS/SPECIAL TOOLS General mechanics tool kit (App B, Item 96) Bearing test fixture (App D, Item 2) Magnetic base dial indicator (App B, Item 45) Spring scale (App B, Item 24) Torque wrench (App B, Item 101) MANDATORY REPLACEMENT (PARTS) 6 Bolts (App F, Item 4) EXPENDABLE/DURABLE SUPPLIES Fuel oil (App C, Item 21) Engine oil (App C, Item 16) Lintless cord (App C, Item 26) EQUIPMENT CONDITION Para Description 4-24 Flywheel housing removed NOTE Before removing idler gear assembly from engine, check idler gear assembly for any wobble or shake. Firmly grasp rim of gear with both hands and rock it. If gear wobbles or shakes, bearing is bad and must be replaced. a. Removal (1) Remove bolt (1) and flat washer (2) securing idler gear assembly (3) to cylinder block. Remove idler gear assembly from engine block. NOTE Effective up to engine number 8VA-349267, a dummy hub was installed opposite idler gear hub to fit the original flywheel housing. 4. (2) Remove bolt (4) and flat washer (5) securing dummy hub (6) to cylinder block. Remove dummy hub (6) from engine block. Change 1 4-87