STEM ASSEM. (90 degrees) 5P1130 - Caterpillar

Install Crankshaft Main Bearings 1203-012
The bearing has a location tab. When viewed from the flywheel, counterclockwise rotation is required for bearing upper half installation. Be sure the tab is properly seated in its groove. Be sure the tab does not shear in the groove.
If the main bearing cap studs were removed, use a 2.00 - 12 Taper Lock Tap to clean the threads in the cylinder block prior to installing the studs. Tighten the studs to 100 20 N m (75 15 lb ft). 1. Use a clean cloth to wipe main bearing upper half. Put clean engine oil on the bearing upper half. Use tool (A) to "roll" main bearing upper half (1) into the cylinder block. (3606, G3606, 3612, G3612) The No. 4 main bearing journal does not have an oil hole. Tool (A) cannot be used to roll in the main bearing upper half. It is necessary to push the main bearing upper half into position by hand. (3608, G3608, 3616, G3616) The No. 5 main bearing journal does not have an oil hole. Tool (A) cannot be used to roll in the main bearing upper half. It is necessary to push the main bearing upper half into position by hand. 2. Install thrust plates (2). If necessary, carefully pry the crankshaft forward or backward so thrust plates (2) can be rolled into position in the cylinder block. (3606, G3606, 3612, G3612) Install thrust plates on main bearing No. 7 (rear main bearing) for rear driven equipment. Install the thrust plates on main bearing No. 1 (front main bearing) for front driven equipment. (3608, G3608, 3616, G3616) Install thrust plates on main bearing No. 9 (rear main bearing) for rear driven equipment. Install the thrust plates on main bearing No. 1 (front main bearing) for front driven equipment. 3. Use a clean cloth to wipe main bearing lower half and half bore in bearing cap. Be sure there is no thread lubricant present on the main bearing lower half or on the bearing cap. Install main bearing lower half (4) in the main bearing cap. Be sure the tab on the back of the bearing is engaged with the slot in the main bearing cap.4. Put clean engine oil on the main bearing lower half. Be sure not to put engine oil on the back side of the bearing.5. Use tool (B) to raise the main bearing cap on the studs.6. Be sure dowel (3) engages with the hole in the cylinder block. The dowel extends from the main bearing cap 10.0 0.5 mm (.39 .02 in).7. Install washers and nuts to hold the main bearing cap. Tighten the nuts securely by hand. Remove tool (B) from the main bearing cap.8. Remove pins, part of tool (B), from the bearing cap. 9. Put 4C-5593 Thread Lubricant on the washer face and threads of each main bearing cap saddle bolt (5).10. Install main bearing cap saddle bolts (5).