INJECTOR GP-FUEL 2272176 - Caterpillar

Illustration 1:
Comparison of earlier and later model 3116 Cylinder Blocks. (A) Front face of earlier model cylinder block with lubrication grooves.(B) Front face of later model cylinder block without lubrication grooves.(C) Main bearing saddle with lubrication grooves. (D) Main bearing saddle without lubrication grooves.The cylinder blocks can also be identified by inspecting the main bearing saddles.* The later model cylinder blocks will not have any lubrication grooves machined in the main bearing saddles.* The earlier model cylinder blocks manufactured before this design change will have lubrication grooves machined in the main bearing saddles.
Illustration 2:
Main bearing locations for earlier model 3116 Cylinder Block.(A) 101-1530 Main Bearing (without lubrication groove.(B) 107-7602 Main Thrust Bearing.(C) 107-7708 Main Bearing (with lubrication groove).
Illustration 3:
Main bearing locations for later model 3116 Cylinder Block.(A) 107-7708 Main Bearing (with lubrication groove).(B) 107-7602 Main Thrust Bearing. Later model 3116 Machine Engines with the 149-5401 Cylinder Block (without lubrication grooves) use six of the 107-7708 Main Bearings and one 107-7602 Main Thrust Bearing. Earlier model 3116 Machine Engines (with lubrication grooves) use three 107-7708 Main Bearings on journals 2, 3, and 5; three 101-1530 Main Bearings on journals 1, 4, and 7; and one 107-7602 Main Thrust Bearing on journal 6. Because of the difference in bearing tab and tab slot locations in the cylinder block, main bearings cannot be accidentally interchanged between the two different styles of cylinder blocks. When replacing main bearings, refer to the following chart.