CONVERSION AR 4928143 - Caterpillar

If there has been a previous repair, part age/hours will apply. Retain a copy of the previous repair invoice in the dealer's records for audit purposes, and specify repair date and machine hours in the "Additional Comments" section of the warranty claim.
When the parts order is placed, please reference the service letter number in the customer reference field.
If Dealers are unable to order 334-0519 Grease from the Cat system, purchase 67700-CAPT Bel-Ray Molylube Anti-Seize Lubricant directly from the supplier or from an industrial supply house and claim as a miscellaneous expense. Two tubes are allowed per engine.
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Rework Procedure
The rod bolts and nuts must be replaced on all cylinders. Replace the bolts two at a time using the following procedure. This procedure will allow the joint to remain closed and reduce the chance of debris entering the rod bearing running surface. The rod cap is not to be removed at any time.
BOLT INSTALLATION PROCEDURE
Refer to Image1.1.1 and Image1.1.2. Holes (1) and (2) are on the same side of the connecting rod as the bearing tab slot (5). Hole (1) is on the side next to the serial number pad (6).
1. Loosen the nuts on bolts (2) and (3) and retighten to finger tight. Loosen nuts on bolts (1) and (4) and retighten to finger tight. Keep the nuts snug to keep the joint closed and prevent debris from entering the bearing.
2. Loosen nuts on bolts (2) and (3) and remove bolts for replacement.
For 6- and 8-cylinder engines, it is acceptable to replace bolts (1) and (2) instead of bolts (2) and (3) during this step. Loosen nuts on bolts (1) and (2) and remove for replacement.
If the crankshaft needs to be rotated in order to remove the bolts there should be a minimum of 105 Nm (75 +/- 10 lb ft) of torque applied to all four bolts in order to prevent the bearing from rotating out of position.
3. Clean the 4W-8344 Retainer and clean the bolt heads of the new bolts. The parts must be clean and dry.
4. Install new 369-7181 connecting rod bolts. Apply 334-0519 Grease (67700-CAPT Bel-Ray Molylube Anti-Seize Lubricant) on the bolt threads, nut threads, and nut seating face AFTER the new bolt is installed in the rod.
DO NOT use Molykote GN with this procedure. The bolt should not be forced into the hole.
5. Turn the two new nuts by hand until they contact the cap face. Threading the nuts by hand provides an opportunity to identify problems with the threads. There should be no resistance felt that would indicate thread damage or debris in the threads. If the nuts and/or bolts cannot be threaded by hand, they should be replaced. Do not run the nuts up to the cap face with a torque gun.
6. Loosen the nuts on bolts (1) and (4) and remove bolts for replacement.
For 6- and 8-cylinder engines, it is acceptable to replace bolts (3) and (4) instead