BOLT 2B4252 - Caterpillar

1. Disconnect electrical plug (1) and throttle linkage (2).2. Disconnect six fuel lines (3) from injection pump. 3. Remove inspection plate (5) from the timing gear cover. 4. Make an alingment of the timing marks on fuel injection pump gear (7) and idler gear (6), or put identification marks on the gears for correct installation. 5. Remove three bolts (8) that hold the fuel injection pump drive gear to the fuel injection pump.
Typical Example6. Put alignment marks on the fuel injection pump and the timing gear case cover as shown. Remove three nuts (9) and washers that hold the fuel injection pump in place. Remove fuel injection pump (10). Remove the gasket from the timing gear case. The following steps are for the installation of the fuel injection pump.7. Put the gasket for fuel injection pump (10) in position on the timing gear case. 8. Position the fuel injection pump; be sure dowel (11) in fuel injection pump gear (7) is in alignment with the groove (slot) in the fuel injection pump shaft when the fuel injection pump is put in position.
Typical Example9. For initial fuel injection pump timing, make an alignment of the reference marks on the fuel injection pump and the timing gear case. Install the three nuts (9) and washers that hold fuel injection pump (10) in place. 10. Be sure the timing marks or the marks that were put on the fuel injection pump gear and idler gear are in alignment. Install three bolts (8) that hold the fuel injection pump gear to the fuel injection pump. 11. Install plate (5) with a new gasket.12 Connect all fuel lines (3), control linkage (2) and electrical plug (1).13. Prime the fuel system. See the MAINTENANCE MANUAL.