ALTERNATOR G - 8N9152 - Caterpillar

start by:a) remove oil pan plate
TYPICAL EXAMPLE1. Remove the Nos. 1, 3 and 5 main bearing caps (1). Remove the crankshaft thrust bearings from No. 5 main bearing. Remove lower halves of bearings from the caps. 2. Install tool (A) in the oil hole in the crankshaft journal and remove the upper halves of the main bearings as the crankshaft is turned the bearing is moved out of the cylinder block with tool (A).3. Put clean SAE 30 oil on the upper halves of the new bearings. Install the upper halves on the main bearings with tool (A).4. Put clean SAE 30 oil on the new crankshaft thrust bearings and install the bearings with the steel back against the crankshaft.
TYPICAL EXAMPLE5. Clean the main the bearing caps and install new lower bearing halves (2). Put clean SAE 30 oil on the bearings, bolt threads and surfaces that make contact with the washers.
Make sure part number on cap is toward front of engine, and number on bottom of cap is the same as number on cap saddle when caps are installed.
The crankshaft must be held up against the upper halves of the bearings before the clearance in the bearings can be checked.6. Check the bearing clearance with Plastigage. Install the caps and tighten the bolts to a torque of 30 3 lb.ft. (40.7 4.1 N m). Put a mark on each bolt head and the bearing caps. Tighten the bolts 90° more. Remove bearing caps and measure the width of the Plastigage. The main bearing clearance (Plastigage width) with new bearing must be .0030 to .0065 in. (0.076 to 0.165 mm). Maximum permissible clearance with used bearings is .010 in. (0.25 mm).7. Put caps (1) in position on the engine and install the washers and bolts. Tighten the bolts to a torque of 30 3 lb.ft. (40 4 N m). Put a mark on each bolt head and the bearing caps. Tighten the bolts 90° more.8. Remove the Nos. 2 and 4 main bearing caps. Do Steps 2, 3, 5, 6 and 7 for the Nos. 2 and 4 main bearings.9. Check the crankshaft end play with tooling (C). The end play is controlled by the thrust bearings on the No. 5 main bearing. End play with new bearings must be .0025 to .0145 in. (0.064 to 0.368 mm). The maximum permissible end play with used bearings is .025 in. (0.64 mm).end by:a) install oil pumpb) install oil pan plate