CONNECTOR-FUEL 3597115 - Caterpillar

Illustration 1.Areas of possible misalignment that can result in a cutting edge.Solution:
There are two main procedures that must be followed in order to reduce or eliminate this problem. These are, proper Tightening Procedure for Connecting Rod Bolts and Manual Deburr of Sharp Edges On Connecting Rod Cap. Tightening Procedure for Connecting Rod Bolts
Illlustration 2. Reference for tightening connecting rod bolts. 1. Side of connecting rod with chamfer.2. Rod bolts.3. Pin. Bolts (A) and (B) are on the same end of the rod cap that has the bearing tabs and locating pin (3).Tighten the connecting rod bolts as follows:1. Put 6V-4876 Molykote Paste on the bolt threads, shank, and the area under the head of each bolt.2. Tighten bolts (A) and (B) to 90 5 N m (65 4 lb ft). 3. Tighten bolts (C) and (D) to 90 5 N m (65 4 lb ft).4. Tighten bolts (A) and (B) again to 90 5 N m (65 4 lb ft).5. Tighten bolts (C) and (D) again to 90 5 N m (65 4 lb ft).6. Tighten each bolt an additional 90 5 degrees. Manual Deburr of Sharp Edges On Connecting Rod CapThe purpose of this deburr process is to remove the sharp edges on the rod cap that can present a cutting edge to the crankshaft if the cap is assembled misaligned.
Illustration 3.Rod CapRemove sharp edge from Point A to Point B.Use a pencil grinder or hand held grinder with circular grinding wheel (Grit size - A80, Diameter - 2 inches, Width - 1/2 inch). Carefully grind the area shown in Illustration 3 from Point A to Point B. The object of the deburr is only to remove the sharp edge and not to remove large amounts of material. Be careful to only deburr the sharp edges and DO NOT deburr any of the shot peened areas. If the shot peening is touched by the grinder, that area must be re-peened using a needle peen. Failure to re-peen the area can result in a failure of the rod cap. Illustration 4 shows what the completed deburr should look like. Notice that the shot peen area has not been touched with the grinder.
Illustration 4. View of rod cap with completed deburr.COPYRIGHT 1998 CATERPILLAR ALL RIGHTS RESERVED