1674 DIESEL TRUCK ENGINE Caterpillar


Connecting Rod

Usage:

(1) Bore in bearing for piston pin (new) ... 1.7012 ± .0003 in.(43.210 ± 0.008 mm)

Maximum permissible clearance between bearing and piston pin (worn) ... .003 in.(0.08 mm)

(2) Bore in connecting rod for bearing ... 3.2500 ± .0005 in.(82.550 ± 0.013 mm)

(3) Distance between center of piston pin and center of crankshaft bearing (new) ... 9.595 ± .001 in.(243.71 ± 0.02 mm)

(4) Diameter of piston pin (new) ... 1.6997 to 1.7000 in.(43.172 to 43.180 mm)

(5) Bore of crankshaft journal bearing ... 3.004 ± .002 in.(76.30 ± 0.05 mm)

Clearance between connecting rod bearing and crankshaft bearing surface (journal) ... .003 to .006 in.(0.076 to 0.152 mm)

Maximum permissible clearance between bearing and crankshaft (worn) ... .010 in.(0.25 mm)

(6) Torque on nut for connecting rod:

a. Put crankcase oil on threads and nut seat

b. Tighten both nuts to ... 30 ± 3 lb. ft.(4.1 ± 0.4 mkg)

c. Mark each nut and end of bolt

d. Again tighten both nuts (from mark) ... 90°

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