GEAR 7W0450 - Caterpillar

Illustration 1 g02988637
Table 1
Specification for 283-7669 Piston and Rod Gp, and 224-3245 Rod As
Item Qty Part Specification Description
A - - Location of the bearing joint from the horizontal centerline of the pin bore is 5 degrees.
B - - Inside diameter of connecting rod for bearing for the piston pin is 64.592 0.013 mm (2.5430 0.0005 inch).
C - - Bore diameter of bearing for the piston pin is 60.035 0.008 mm (2.3636 0.0003 inch).
D - - Maximum length for heating the connecting rod during the installation of bearing for piston pin is 93.0 mm (3.66 inch).
Temperature for heating the connecting rod is 175 to 260 °C (347 to 500 °F).
Note : Apply heat to the connecting rod prior to installation of bearing for piston pin.
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 270.76 mm (10.660 inch).
F - - Inside diameter of connecting rod for the bearing for crankshaft journal is 103.200 0.013 mm (4.0630 0.0005 inch).
G - - Bore in the bearing for crankshaft is 97.088 0.016 mm (3.8224 0.0006 inch).
1 4 213-3217 Bolt Use the following procedure in order to tighten the bolts for the rod cap. Refer Illustration 1 for tightening sequence.
1. Before assembly, lubricate the threads of the bolts and the seating face of the bolt heads with clean engine oil.
2. Tighten bolt 1 and bolt 3 to 70 4 N m (52 3 lb ft).
3. Tighten bolt 2 and bolt 4 to 70 4 N m (52 3 lb ft).
4. Tighten bolt 2 and bolt 4 by an additional angle of 60 5 degrees.
5. Again tighten bolt 1 and bolt 3 to 70 4 N m (52 3 lb ft).
6. Tighten bolt 1 and bolt 3 by an additional angle of 60 5 degrees.