Figure 13-37. Timing Gear, Exploded View

Section VII. CYLINDER HEAD AND VALVE OPERATING MECHANISM

TM-5-6115-593-34 Generator Set Diesel Engine Driven Tactical Skid Mtd. 600 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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TM5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 13-23. TIMING GEAR AND COVER. To inspect and replace the timing gear and cover, refer to figures 13- 36, and 13-37, and proceed as follows: a. Removal. Proceed as follows: (1) Remove 26 screws (27, figure 13-36) and two screws (20) and lockwashers (21). (2) Install two 6-inch (152 mm) guide studs through top of gear case into block to pre- vent gear case from falling during removal. (3) With a soft hammer, tap case alternately top and bottom, left and right, to drive from dowels. (4) Lift gear case from guide studs and remove studs from block. (5) Remove capscrew (1, figure 13-37) lockwasher (2), front thrust washers (4 and 5), gear and bushing (7 and 8) and rear thrust washer (5). b. Inspection. (1) Inspect gear for cracks, broken teeth, or visible wear. Replace if damaged or excessively worn. (2) Inspect gear case for cracks, burrs, or breaks. Replace if damaged. (3) Inspect screw threads and repair with heli- coil inserts if found damaged. (4) Inspect dowels for damage; replace or bore out for oversize if required. c. Installation. (1) Install thrust washer (5, figure 13-37) on idler shaft (6) with oil grooves facing away from shaft shoulder. (2) Insert dowel pin (3) in drilled hole in end of idler shaft (6), if removed. (3) Install timing gear (7) on shaft (6) indexing two "O" marks on gear astride single "O" mark on crankshaft gear. (4) Install outer thrust washers (5 and 4) over shaft with oil grooves next to idler gear. (5) Install lockwasher (2) and screw (1). (6) Timing gear thrust limit is 0.001 to 0.016 inch (0.03 to LEGEND 1. Screw 4. Washer 7. Idler gear assy 2. Lockwasher 5. Washer 8. Bushing 3. Pin 6. Shaft 9. Gear Figure 13-37. Timing Gear, Exploded View 13-73

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