SUPPORT AS 4325421 - Caterpillar

Illustration 1 g03019677
Table 1
Specification for 371-0840 Connecting Rod Gp
Item Qty Part Specification Description
A - - Location of the bearing joint from the horizontal centerline of the pin bore is 10 degrees.
B - - Inside diameter of connecting rod for bearing for the piston pin is 75.760 0.015 mm (2.9827 0.0006 inch).
C - - Bore diameter of bearing for the piston pin is 70.000 0.008 mm (2.7559 0.0003 inch).
D - - Maximum length for heating the connecting rod during the installation of bearing for piston pin is 105.0 mm (4.13 inch).
Temperature for heating the connecting rod is 175 to 260 °C (347 to 500 °F).
E - - Distance between the center of the bore for the bearing for piston pin and the center of the bore for the crankshaft journal is 392.5 mm (15.45 inch).
- - - Etch the cylinder number on the connecting rod and the cap in location (1). Mark the connecting rod and the cap with numbers. Mark the numbers on the same side of the connecting rod as the bearing retainer notch.
F - - Inside diameter of connecting rod for the bearing for crankshaft journal is 143.028 0.015 mm (5.6310 0.0006 inch).
G - - Bore in the bearing for crankshaft is 135.133 to 135.194 mm (5.3202 5.3226 inch).
2 1 7N-2043 Dowel Protrusion of the dowel (H) from the connecting rod cap is 4.0 0.5 mm (0.16 0.02 inch).
Illustration 2 g03019678
View of J-J
Table 2
Item Qty Part Specification Description
3 4 7N-2405 Bolt Use the following procedure in order to tighten the bolts for the rod cap. Refer Illustration 2 for tightening sequence.
1. Before assembly, lubricate the threads and seats of the bolts with Molylube.
2. Tighten bolt 1 and bolt 2 to 90 5 N m (66 4 lb ft).
3. Tighten bolt 3 and bolt 4 to 90 5 N m (66 4 lb ft).
4. Again, tighten bolt 3 and bolt 4 to 90 5 N m (66 4 lb ft).
6. Tighten each bolts for an additional angle of 90 5 degrees.