KIT-UNLOADER 6I1220 - Caterpillar

Illustration 1 g02578016
Tightening sequence
Table 1
Specification for 232-3232 Rod As
Item Qty Part Specification Description
1 4 213-3217 Bolt Use the following procedure for tightening the bolts for the rod cap. Refer Illustration 1.
1. Before assembly, lubricate the threads of the bolts and the seating face of the bolt heads with clean engine oil.
2. Finger tighten all the bolts.
3. Tighten bolts 1 and 3 to 70 4 N m (52 3 lb ft).
4. Tighten bolts 2 and 4 to 70 4 N m (52 3 lb ft).
Note : Use a paint stick to place an index mark on each of the bolts. Use the index mark as a reference in order to torque the bolts for an additional angle.
5. Tighten bolts 2 and 4 by an additional angle (A) of 60 5 degrees.
6. Tighten bolts 1 and 3 again to 70 4 N m (52 3 lb ft).
7. Tighten bolts 1 and 3 by an additional angle (A) of 60 5 degrees.
The connecting rods should be installed in the engine so that the part number of the forging for the rod assembly is facing the connecting rod that is on the same crankshaft pin. The opposite side of the connecting rods will face the thrust surface of the crankshaft journal.
Illustration 2 g02577978
Table 2
Specification for 232-3232 Rod As
Item Qty Part Specification Description
B - - Inside diameter of connecting rod for bearing for the crankshaft journal is 103.500 0.013 mm (4.0748 0.0005 inch).
C - - The bearing joint must be located within area (C) along the horizontal centerline of the piston pin bore.
D - Maximum angle from the horizontal centerline is 5 degrees.
E - - Inside diameter of connecting rod of bearing for the piston pin is 64.592 0.013 mm (2.5430 0.0005 inch).
F - - Bore diameter of bearing for the piston pin is 60.035 0.008 mm (2.3636 0.0003 inch).
G - - Outside diameter of bearing for piston pin before installation into the connecting rod is 64.717 0.013 mm (2.5479 0.0005 inch).
- - - Note : Apply heat to the connecting rod prior to installation of bearing for piston pin. Do not use a torch to heat the connecting rod.
H - - Maximum length for heating the connecting rod during the installation of bearing for piston pin is 95 mm (3.7 inch).
- - - Temperature for heating the connecting rod is 175 to 260 °C (347 to 500 °F)
J - - Distance between the center of the bore for the bearing for piston pin and the center of the bore for the crankshaft journal is 274.91 mm (10.823 inch).