WHEEL-IDLER 2781301 - Caterpillar

Remove Crankshaft
START BY:a) remove flywheel housingb) remove timing gear coverc) remove oil pump Make sure the engine is in correct time. See TESTING AND ADJUSTING. This procedure must be completed before any start by operations are done. 1. Fasten tool (A) to the engine and put the engine in position as shown.2. Check the connecting rods and the caps for their identification and location.3. Remove nuts (2) and caps (1) from the engine.4. Carefully move the connecting rods away from the crankshaft. 5. Check the bearing caps for a number as to their location. If a number can not be seen, put a number on the side of cylinder block and bearing cap.6. Remove bolts (3) and bearing caps (4) from the engine. 7. Remove thrust bearings (5) from each side of No. 4 crankshaft main bearing. 8. Fasten tooling (B) and a hoist to crankshaft (6) and remove it from the engine. The weight of the crankshaft is 159 kg (350 lb.). 9. Use tooling (C) and remove outer gear (7) from the crankshaft.10. Use a hammer and a chisel to remove the spacer from the crankshaft. 11. Use tooling (D) to remove the dowel from the crankshaft.12. Use tooling (C) to remove inner gear (8) from the crankshaft. 13. Remove crankshaft main bearings (9) from the cylinder block. If new main bearings are not to be installed, keep old bearings with identification as to their location in the cylinder block.Install Crankshaft
1. If dowel (1) was removed from crankshaft (2), install it in the flywheel end of the crankshaft to a maximum dimension of 6.4 mm (.25 in.).2. Heat the crankshaft gears to a maximum temperature of 230°C (446°F).3. The centerline of inner gear key way must be in alignment with the centerline of the dowel hole within 0.51 mm (.020 in.). Install crankshaft inner gear (4) on the crankshaft.4. Install the spacer on the crankshaft.5. Install the dowel in the crankshaft. The dowel must be extended no more than 4.1 0.5 mm (.16 .02 in.) from the surface of the crankshaft. The dowel in the crankshaft must be in alignment with the notch in crankshaft gear (3).6. Make sure the "V" mark on the crankshaft gear is toward the outside and install crankshaft gear (3).7. Clean the cylinder block and main bearing caps thoroughly. Install the bearings dry when the clearance checks are made. Put clean engine oil on the bearings for final assembly. 8. Install upper half of main bearings (5) in the cylinder block. Make sure the tabs on the back of the bearings fit in the grooves of the cylinder block.9. Fasten tooling (A) and a hoist to each end of crankshaft (2) as shown.10. Put crankshaft (2) in position in the cylinder block. 11. Make sure the "V" mark on crankshaft gear (3) is in alignment with "V" mark on idler gear (6). The "K" marks on the camshaft gear can be seen at the outer edges of the idler