PUMP AS-AIR 3218191 - Caterpillar

start by:a) remove timing gear coverb) remove fuel injection pump housing and governorc) remove fuel transfer pump The engine is removed for photo illustration only.1. Turn the fuel valve to the "OFF" position. The location of the fuel valve is under the fuel tank.2. Remove the nut and washer that hold the drive gear to the accessory drive shaft. 3. Use tooling (A) to remove the drive gear from the accessory drive shaft. Remove the sleeve from the drive shaft.4. Disconnect the fuel line from the fuel filter base and put caps and plugs on the openings to keep dirt and foreign material out of the fuel system. 5. Remove bolts (1), locks (2) and retainer (3) to remove the accessory drive housing (4) and fuel filter base from the engine as a unit.6. Remove the drive shaft and bearing from housing (4). 7. Use tool (B) to remove the bearing from the drive shaft.Install Accessory Drive Shaft
1. Heat the bearing to a maximum temperature of 275° F (135°C) and install it on the accessory drive shaft (1).2. Install the sleeve for the drive gear on the end of drive shaft (1) next to the bearing.3. Install drive shaft (1) in the accessory drive housing. 4. Put the fuel filter base, accessory drive housing (2) and the gasket in position. Install the retainer, locks and bolts to hold housing (2). 5. Turn the accessory drive shaft until tool (A) can be installed with the dowel holes in tool (A) in alignment with the dowels in housing (2). 6. Put the drive gear in position on the drive shaft and install the washer (with the outside diameter in contact with the gear) and nut (3). Tighten nut (3) to a torque of 100 10 lb.ft. (135 14 N m).7. Remove all plugs and caps from the fuel openings and connect the fuel line to the fuel filter base.8. Turn the fuel valve to the "ON" position.end by: a) install fuel transfer pumpb) install fuel injection pump housing and governorc) install timing gear cover