BLOCK GP-PUMP 4547917 - Caterpillar

Table 1
Required Tools
Part Number Part Name Qty
150-3993 Timing Pin (1) 1
(1) 150-3993 Timing Pin is for Lucas and Stanadyne fuel injection pumps.
Illustration 1 g00309806
Timing gear and hub of the fuel injection pump (Lucas and Stanadyne)
(1) Timing pin
(2) Torx screws
(3) Hub nut
(4) Hole in pump body
(5) Slot for timing gear
(6) Slot for hub This procedure can only be used when the No. 1 piston is set to the top center position on the compression stroke. Refer to the Disassembly and Assembly Module, "Setting The Top Center Position By The Alternate Method" topic in this module.Note: Do not remove hub nut (3) from the shaft of the fuel injection pump. The hub of the fuel injection pump is installed on the shaft of the pump in the factory in order to ensure that the fuel injection pump is in the correct position for timing. If the hub is removed, the hub will need to be accurately installed to the shaft of the pump by the use of special equipment. Refer to your Caterpillar Dealer for repairs to the fuel injection pump.Note: Do not loosen torx screws (2). If the torx screws are loosened and the timing plate is moved, the timing position that is set at the factory will be lost. If the timing position is lost, the engine must be set to the top center position on the No. 1 cylinder on the compression stroke before the torx screws are tightened.
Set the No. 1 piston to the top center position on the compression stroke.
Remove the water pump. Refer to the Disassembly and Assembly Module, "Water Pump - Remove" topic.
Insert timing pin (1) through the slot for timing gear (5). Continue to insert the timing pin through the slot for hub (6). Push the pin all the way into the hole of pump body (4). If the pin can be inserted all the way, the pump timing is correct. Resistance should not occur until the pin is inserted all the way into the hole of the pump body.
Remove the timing pin.
If the timing pin cannot be inserted all the way into the hole of the pump body, make sure that the engine is correctly set at the top center position of the number one cylinder on the compression stroke.
The fuel injection pump must be set by an authorized technician when the following conditions exist: Note: Refer to your Caterpillar Dealer for timing adjustment of the fuel injection pump.
The engine is set correctly at the top center.
The pin cannot be easily inserted.
The pin cannot be inserted all the way into the hole of the pump body.Refer to the Disassembly and Assembly Module, "Fuel Injection Pump" topic for removal and installation procedures.