RAIL AS-FUEL 20R4263 - Caterpillar

DI CONNECTING ROD WITH TAPERED PIN END
PC CONNECTING ROD WITH STRAIGHT PIN END(1) Bore in connecting rod for piston pin bearing ... 1.6255 .0005 in.(41.288 0.013 mm) Tight fit between connecting rod eye and piston pin bearing ... .0025 to .0045 in.(0.064 to 0.114 mm) Connecting rod must be heated for installation of piston pin bearing. Do not use a torch.Heat connecting rod to temperature of (maximum) ... 400° F(215° C) Piston pin bearing junction and locating notch must be assembled in the top half of rod eye. Bearing junction can be located at either position "A" above centerline.Make reference to Special Instruction Form SMHS7295 for use of pin bearing removal and installation tools and procedure.(2) Bore in connecting rod for bearing with nuts tightened to specifications (6) ... 2.9418 .0005 in.(74.721 0.013 mm)(3) Distance between center of bearings ... 7.900 .001 in.(200.66 0.03 mm)(4) Bore in bearing for piston pin (new) ... 1.5010 .0003 in.(38.125 0.007 mm) Diameter of piston pin (new) ... 1.4999 .0002 in.(38.097 0.005 mm)Maximum permissible clearance between bearing and piston pin (worn) ... .003 in.(0.08 mm)(5) Bore in bearing for crankshaft bearing surface (journal) ... 2.753 .001 in.(69.97 0.03 mm) Clearance between bearing and crankshaft bearing surface (journal) ... .0017 to .0055 in.(0.043 to 0.140 mm)Maximum permissible clearance between bearing and crankshaft bearing surface (journal) ... .007 in.(0.18 mm)(6) Tightening procedure for connecting rod bolts: a. Put 2P2506 Thread Lubricant on bolt threads and contact surfaces of nut and cap.b. Tighten both nuts to ... 30 3 lb. ft.(40 4 N m)c. Put a mark on each nut and end of bolt.d. Tighten each nut from mark ... 60° 5°Make reference to Special Instruction Form Nos. GMG02394 & GMG02395 for information about checking and reconditioning connecting rods.