PUMP GP-PISTON 9T3680 - Caterpillar

Remove Crankshaft & Gear
Start By:a. remove flywheel housingb. remove valve liftersc. remove pistons & connecting rod assembliesd. remove timing gear cover & oil pump 1. Fasten a hoist, and put the engine in position on tool (A).2. Turn crankshaft (3) until the timing mark on the crankshaft gear is in alignment with the timing mark on the camshaft gear. For more detail about removal of main bearings, see the topic, Remove & Install Crankshaft Main Bearings.3. Remove bolts (1) and main bearing caps (2). Remove the lower halves of the main bearings from the caps.4. Install two of the bolts that hold the flywheel in place in the end of the crankshaft.
Be careful not to damage the crankshaft journals when the crankshaft is removed.
5. Fasten a hoist, and remove crankshaft (3) from the engine. Weight of the crankshaft is 54 kg (120 lb).6. Remove the upper halves of the main bearings from the cylinder block. 7. Install tooling (B), and remove the gear from the crankshaft.Install Crankshaft & Gear
1. Install the key for the crankshaft gear so it is even with the end of the crankshaft.2. Heat the crankshaft gear to a maximum temperature of 260°C (500°F). Install the gear on the crankshaft with the timing mark on the gear toward the pulley end of the crankshaft.3. Install the thrust bearing for the No. 4 main.4. Install the upper main bearings (the bearings with oil hole) into the engine block.5. Install two of the bolts that hold the flywheel in place in the end of the crankshaft. Fasten a hoist, and put the crankshaft in position in the block. Make sure the timing mark on the crankshaft gear is in alignment with the timing mark on the camshaft gear.
When the bearing caps are installed, make sure the number on the side of the cap is next to and respective with the number on the engine block.
6. Put 2P2506 Thread Lubricant on the bolt threads and washer faces. Put clean engine oil on the main bearings. Put the bearing caps in position, and install the bolts. Tighten the bolts in number sequence as follows:a. Tighten bolts 1 through 10 to a torque of 40 4 N m (30 3 lb ft).b. Put a mark on each bolt head and bearing cap. Tighten bolts 1 through 10 120° 5° more.7. Install indicator group (A), and check the end play of the crankshaft. The end play is controlled by the thrust bearing on No. 4 main bearing. The end play with new bearings must be 0.08 0.25 mm (.003 to .010 in). The maximum permissible end play with a used bearing is 0.36 mm (.014 in).End By:a. install timing gear cover & oil pumpb. install pistons & connecting rod assembliesc. install valve liftersd. install flywheel housing