3176 DIESEL TRUCK ENGINE Caterpillar


Connecting Rods

Usage:

(1) Bore in connecting rod for piston pin bearing ... 55.435 ± 0.013 mm (2.1825 ± .0005 in)

NOTE: The connecting rod must be heated for installation of piston pin bearing. Do not use a torch.

(2) Distance rod may be heated to 175 to 260° C (347 to 500° F) to install the piston pin bearing ... 85.0 mm (3.35 in)

(3) Bore in bearing for piston pin (new) ... 50.830 ± 0.008 mm (2.0012 ± .0003 in.)

Diameter of piston pin (new) ... 50.795 ± 0.005 mm (2.0000 ± .0002 in)

Thoroughly lubricate piston pin with clean engine oil prior to inserting into piston group and rod assembly.

(4) Bearing joint must be at either location ... ± 10°

(5) Distance between center of bearings ... 225.00 mm (8.858 in)

(6) Bore in bearing for crankshaft journal ... 82.000 ± 0.020 mm (3.2283 ± .0008 in)

(7) Location for etching cylinder number on connecting rod and cap. Rods and caps are to be marked with numbers 1 thru 6 on the same side of the rod as the bearing retainer notch.

NOTE: Install connecting rod in engine with the part number to the rear of the engine.

(8) Tighten connecting rod bolts as follows:

a. Before installing bolts, lubricate bolt threads and seating faces of the caps with 2P2506 Thread Lubricant.

b. Tighten each bolt to ... 130 ± 7 N·m (95 ± 5 lb ft).

c. Put an alignment mark on each cap and nut.

d. Tighten each nut an additional ... 60 ± 5° (1/6 turn)

(9) Bore in connecting rod for crankshaft rod journal bearing ... 86.800 ± 0.013 mm (3.4173 ± .0005 in)

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