COLLAR 9F7666 - Caterpillar

Illustration 1 g01907773
(1) Camshaft gear
(2) Idler gear
(3) Fuel injection pump gear Note: If one or more of the gears need to be removed for repair, refer to Disassembly and Assembly, "Gear Group (Front) - Remove" in order to properly remove the gears. Refer to the Disassembly and Assembly, "Gear Group (Front) - Install" in order to properly install the gears.
Inspect the gears for wear or for damage. If the gears are worn or damaged, use new parts for replacement.
Measure the backlash between the camshaft gear (1) and the idler gear (2). Refer to Specifications, "Gear Group (Front)" for the backlash measurement.
Measure the backlash between the idler gear (2) and the crankshaft gear (4). Refer to Specifications, "Gear Group (Front)" for the backlash measurement.
Measure the backlash between the fuel injection pump gear (3) and the idler gear (2). Refer to Specifications, "Gear Group (Front)" for the backlash measurement.
Measure the end play on idler gear (2). Refer to Disassembly and Assembly, "Idler Gear - Install" for the correct procedure. Refer to Specifications, "Gear Group (Front)" for the end play measurement.