Remove the water pump. Refer to Disassembly and
Assembly, "Water Pump - Remove".
Remove the fuel injection lines. Refer to Disassembly
and Assembly, "Fuel Injection Lines - Remove and
Disconnect any wires to fuel injection pump.
For a complete description of Type 1 and Type 2
Engines, refer to the Disassembly and Assembly,
"Engine Design" topic.
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
Care must be taken to ensure that fluids are contained
during performance of inspection, maintenance, testing,
adjusting and repair of the product. Be prepared to collect
the fluid with suitable containers before opening any
compartment or disassembling any component containing
Refer to Special Publication, NENG2500, "Caterpillar Tools
and Shop Products Guide" for tools and supplies suitable
to collect and contain fluids on Caterpillar products.
Dispose of all fluids according to local regulations and
Ensure that the number 1 cylinder is at the top center
position on the compression stroke. Refer to the
Testing and Adjusting, "Fuel System" topic for additional
Do not remove hub nut (4) from the shaft of the
fuel injection pump. The hub of the fuel injection
pump is installed in the correct position from the
factory in order to ensure proper timing. If hub
nut (4) is removed and the hub is removed, the
hub will need to be accurately installed on the
shaft of the fuel injection pump. Special
equipment is available at your Caterpillar Dealer
for this procedure.
Do not release torx screws (5). If the torx screws
are released and the timing plate is moved, the
timing position that is set at the factory will be
lost. If the torx screws are released, the number 1
cylinder must be set to the top center position on
the compression stroke before the torx screws
Slowly rotate the crankshaft until hole (6) in the timing
gear and hole (7) in the hub are in alignment with hole
(8) in the fuel injection pump body.
The location of Tool (A) for Bosch fuel injection
pumps will be located toward the top of the fuel
injection pump. The location of Tool (A) for Lucas
and Stanadyne fuel injection pumps will be
located toward the bottom of the fuel injection
Install Tool (A) through hole (6) in the timing gear and
hole (7) in the hub. Push Tool (A) into position in hole
(8) in the fuel injection pump body. If Tool (A) can be
fully seated, the fuel injection pump timing is correct.
No resistance should be felt when the timing pin is
inserted into hole (8) of the fuel injection pump body.