SHAFT-BEVEL PINION 1182923 - Caterpillar

Check For Connecting Rod Distortion
The 5P2050 Connecting Rod Checking Fixture is used to check for bearing bore center-to-center distance and for piston pin bearing bore to crankshaft bearing bore alignment. The checking fixture can be used to check connecting rods with or without the piston pin bearing installed.To check connecting rods that are to be reconditioned, the fixture must first be adjusted to the correct bearing bore center-to-center distance. Use a connecting rod of known length (master rod) for adjustment.Remove the connecting rod bearing and install the cap on the connecting rod and tighten the nuts as shown in the SPECIFICATIONS. Remove the piston pin bearing from the connecting rod.Put the 5P2041 Pin Mandrel in the piston pin end of the master rod. Install the 5P2013 Plunger Extension on the plunger of the 5P2053 Crank Mandrel. Install the 5P2051 Position Arm on the end of the crank mandrel. Put the crank mandrel in the crankshaft bearing bore of the master rod. Move the position arm so it is in alignment with the centerline of the pin mandrel. Turn the actuator knob on the end of the crank mandrel and tighten the mandrel in the rod.Put the master connecting rod on the checking fixture. Move the dial indicator holder until both indicators show approximately .010 in. less than one complete revolution. Turn the dial face of each indicator until the hand is on zero.Remove the connecting rod from the fixture; turn the rod 180° horizontally and put the rod on the fixture again. If the dial indicators read zero, the fixture is adjusted correctly. If there is a different reading on the dial indicators, move the dial face one-half the distance between zero and the reading. Remove the master rod from the fixture and remove mandrels from the master rod.The checking fixture is now adjusted to check connecting rods for reconditioning.Use the procedure that follows to inspect connecting rods to check if they are acceptable for reconditioning.Remove the connecting rod bearing and install the cap on the connecting rod and tighten the nuts as shown in the SPECIFICATIONS. Remove the piston pin bearing from the connecting rod.Put the 5P2041 Pin Mandrel in the piston pin bearing bore. Put the 5P2053 Crank Mandrel with 5P2013 Plunger Extension and 5P2501 Position Arm in the crankshaft bearing bore. Move the position arm in alignment with the centerline of the pin mandrel. Turn the actuator knob on the crank mandrel and tighten the mandrel in the rod.Put the connecting rod on the checking fixture. Make a record of the readings on each of the dial indicators. Add the two readings and divide by two. The result is the average difference from the master connecting rod bearing bore center-to-center distance. The The allowable difference for rods that are acceptable for reconditioning is .004 in.Leave the connecting rod in the checking fixture and check for both bores parallel. Make a record of the readings for both dial indicators. The total difference between indicator readings