C7 Industrial Engines Disassembly and Assembly – Unit Injector Hydraulic Pump – Install

Installation Procedure for Non-Dual Tapered Roller Bearing HEUI Pump

 


NOTICE
Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.


 


NOTICE
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 fluids.

Refer to Special Publication, NENG2500, “Dealer Service Tool Catalog” for tools and supplies suitable to collect and contain fluids on Cat products.

Dispose of all fluids according to local regulations and mandates.


 Illustration 1 g03601539
Non-Dual Taper Roller Bearing HEUI pump


Illustration 2 g03601540
Dual Taper Roller Bearing HEUI pump

Note: Refer to Illustrations 1 and 2 in order to identify each unit injection hydraulic pump.

Illustration 3 g03590742
Install new O-ring seal (8) .

Illustration 4 g01263139
Position unit injector hydraulic pump (1) in the front housing.
Support unit injector hydraulic pump (1) and install bolts (7) and the washers.


Connect hose assemblies (3) , (6) , and (5) .
Connect tube assembly (4) .
Connect harness assembly (2) to unit injector hydraulic pump (1) .
End By:

Install the air compressor.
Install fuel filter base, if necessary.

Installation Procedure for Dual Tapered Roller Bearing HEUI Pump

Note: If replacing a non-dual tapered roller bearing HEUI pump with a dual tapered roller bearing HEUI pump, refer to Special Instruction, REHS8178 for rework and installation procedures.


Illustration 6 g03601539
Non-Dual Taper Roller Bearing HEUI pump

Illustration 7 g03601540
Dual Taper Roller Bearing HEUI pump

Note: Refer to Illustrations 6 and 7 in order to identify each unit injection hydraulic pump.

Note: If a dowel pin is installed in the mounting flange of the unit injector hydraulic pump or in the front housing at the unit injector hydraulic pump mounting location, remove the dowel pin before installing the unit injector hydraulic pump.

Illustration 8 g03607993
Install O-ring seal (6) . Apply Tooling (A) to O-ring seal (6) , the mounting flange of the unit injector hydraulic pump, and the back of the front housing at the mounting location of the unit injector hydraulic pump.

Illustration 9 g03608379
Position unit injector hydraulic pump (5) as shown, then rotate clockwise to final installation orientation.

Illustration 10 g03607991
Install bolts (4) hand-tight.
Note: Do not fully tighten bolts (4) until all of the hoses and the tubes are connected to unit injection hydraulic pump (5) .

Illustration 11 g03607901
Install hose assembly (3) . Install tube assembly (2) hand-tight.
Tighten bolts (8) to a torque of 55 ± 10 N·m (41 ± 7 lb ft).
Tighten tube assembly (8) .
Connect harness assembly (1) .
End By:

Install the air compressor.
Install fuel filter base, if necessary.

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