VALVE GP-RELIEF 2289240 - Caterpillar

Remove Crankshaft Main Bearings
start by: a) remove engine oil coolerb) remove fresh water pumpc) engine oil pumpd) remove oil pressure regulator valvee) remove starters1. Fasten a hoist and remove the prelubrication pump and motor as a unit (if so equipped). Weight is 105 lb. (47.3 kg).2. Remove the wire harness and plate for prelubrication oil pump and motor. 3. Remove the bolts (1) that hold inspection covers to block. Remove the inspection covers (2) from each side of block. 4. Remove the nuts for main bearing caps with wrench (B). Remove the bearing cap with lower half of main bearing. 5. Use tool (A) to move out the upper half of main bearing as the crankshaft is turned in the normal direction of rotation. On the bearing journal that has no drilled hole, put a thin piece of fiber, hardwood or plastic against end of bearing opposite tab. Hit the bearing lightly with the above until tab of bearing is free from cylinder block. Remove the upper half of bearings.Install Crankshaft Main
1. Use tool (A) to install upper half of bearing in cylinder block. The bearing with oil hole is upper half. Install the main bearing dry when the clearance checks are made. Put clean engine oil on the main bearings for final assembly.2. Clean main bearing caps and install lower halves of bearings in caps. When the bearing clearance is checked with the engine in the normal position, such as in the vehicle, the crankshaft will have to be lifted up and hel against the upper halves of the main bearings to get a correct measurement with Plastigage. Plastigage will not hold the weight of the crankshaft and give a correct indication. Do not turn crankshaft when Plastigage is in position to check clearance. 3. Use Plastigage (C) to check bearing clearance. Install caps and tighten both nuts with tool (B) to 200