C175 Tier 4 Final Engines for Caterpillar Built Machines Caterpillar

Fuel Pump (High Pressure) - Remove and Install

Usage:

793F D3T

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	439–3940	Bracket Ast	2
	6V-3668	12 MM Bolt	2
	5P-8245	Hard Washer	2

Start By:

Remove the fuel transfer pump.

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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, PERJ1017, "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.

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NOTICE

Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

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This fuel system may contain high-pressure fuel for extended periods after engine shutdown. Do not open the high-pressure fuel system without first releasing the high-pressure fuel from the system. Refer to the Operation and Maintenance Manual, "High-Pressure Fuel System - Pressure Release" to properly release fuel pressure. Exposure to high-pressure fuel may result in personal injury.

Note: Inspect all O-rings, seals, and gaskets for wear and damage. Replace if necessary.

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Illustration 1	g06310060

Remove all mounting hardware (1).
Disconnect harness (2) and position out of the way.
Disconnect sensors (3), (4), and atomizer (5) and position out of the way.
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Illustration 2 g06310078
Remove eight bolts (6) and manifold (7).
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Illustration 3 g06310950
Remove all mounting hardware. (9).
Remove hose assembly (8).
Disconnect harness assembly (10) and position out of the way.
Remove bolt (12) and plate (11).
Disconnect hose assemblies (13) and (14) and position out of the way.
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Illustration 4 g06310954
Remove hose assemblies (15) and (16).
Disconnect harness assemblies (17) and (18) and position out of the way.
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Illustration 5 g06310957
Remove two bolts (19) and plate (20).
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Illustration 6 g06310960
Attach Tooling (A) and a suitable lifting device to the high-pressure fuel pump (22). The high-pressure fuel pump (22) weighs approximately 150 kg (330 lb).
Remove four bolts (21).
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Illustration 7 g06310963
Rotate high-pressure fuel pump (22) as shown and remove.

Installation Procedure

Install high-pressure fuel pump (23) in the reverse order of removal.
1. Lubricate the threads and O-ring on hose assembly (15).
2. Tighten hose assembly (15) to a torque of 38 ± 3 N·m (28 ± 2 lb ft).
3. Retighten hose assembly (15) to a torque of 100 ± 5 N·m (74 ± 4 lb ft).
4. Install pressure sensor (exhaust inlet) (3). Refer to Disassembly and Assembly, "Pressure Sensor (Exhaust Inlet) - Remove and Install)".
5. Install temperature sensor (exhaust inlet) (4). Refer to Disassembly and Assembly, "Temperature Sensor (Exhaust Inlet) - Remove and Install".