Rework Procedure for the Fuel Filter Housing on Certain Machine Engines {1261} Caterpillar

Rework Procedure for the Fuel Filter Housing on Certain Machine Engines {1261}

Usage:

Engine: 3512E (S/N: BZ3112-UP; SK31-1,177-UP; SK51-1,100-UP); C175-16 (S/N: 3B91-UP); C175-20 (S/N: R4F1-UP)
Off-Highway Truck/Tractor: 793F (S/N: D3T1-UP)
Wheel Loader: 994K (S/N: MM9305-UP; MRK1-204,320-UP; SMX1-UP)

Introduction

The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.

Problem

The bottom cap of the fuel filter housing has come loose on certain machine engines.

Solution

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Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.

Table 1 contains the new part numbers for this change.

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Table 1
New Part Number	New Part Name	Quantity
492-3532	Fuel Filter Housing As	1
5P-8428	O-Ring Seal	1
445-0939	Fuel Filter Element	1

Table 2 contains the required tools for this procedure.

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Table 2
Tool Description	Quantity
Loctite^® 263 Red Threadlocker	1
222-3117 Brake Cleaner	1
Strap Wrench	1
1P-0808 Multipurpose Grease	1
Hooked Pick	1

Loctite^® 263 Red Threadlocker

https://www.henkel-adhesives.com/us/en/product/threadlockers/loctite_243.html

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Illustration 1	g06364265
(1) 492-3532 Fuel Filter Housing As

If the bottom cap has come loose on fuel filter housing assembly (1), remove the fuel filter housing assembly.
Reference: Operation and Maintenance Manual, M0067278, "C175-20 Locomotive Engine"
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Illustration 2 g06364266

(T1) Strap Wrench
(A) Cap
(B) Tube
(C) Filter Base
Remove cap (A) from tube (B) using either a 38 mm (1.5 inch) hexagonal socket or a strap wrench.
Note: If necessary a second strap wrench can be used to hold tube (B) while removing cap (A).
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Illustration 3 g06364267

(T1) Strap Wrench
(B) Tube
(C) Filter Base
Remove tube (B) from filter base (C) using strap wrench (T1).
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Illustration 4 g06364268

(B) Tube
(2) 5P-8428 O-Ring Seal
Remove o-ring seal (2) from tube (B).
Inspect o-ring seal (2).
Note: If the seal is bad, discard o-ring seal (2).
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Illustration 5 g06364269

(T2) 222-3117 Brake Cleaner
(A) Cap
Clean and inspect cap (A) with brake cleaner (T2).
Note: Before proceeding, ensure that the threads of cap (A) are free of debris, clean, and dry.
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Illustration 6 g06364270

(B) Tube
(2) 5P-8428 O-Ring Seal
Install o-ring seal (2) into tube (B).
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Illustration 7 g06364271

(T3) 1P-0808 Multipurpose Grease
(A) Cap
(3) Threads
(4) Chamfer
Carefully apply a layer of multipurpose grease (T3) to chamfer (4) of cap (A).
Note: Do not get any grease on threads (3) because the grease will prevent the Loctite ^® 263 Red Threadlocker from bonding.
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Illustration 8 g06364272

(T4) Loctite ^® 263 Red Threadlocker
(B) Tube
Apply a minimum of 8 drops of Loctite ^® 263 Red Threadlocker (T4) to several locations on the threads of tube (B).
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Illustration 9 g06364273

(A) Cap
(B) Tube
Without tightening install cap (A) onto tube (B).
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Illustration 10 g06364274

(T5) Ratchet With 38 mm (1.5 inch) Hexagonal Socket
(A) Cap
(B) Tube
(C) Filter Base
Without tightening install tube (B) with cap (A) into filter base (C).
Tighten cap (A) and tube (B) to filter base (C) to a torque of 339 N·m (250 lb ft).
After 24 hours remove the housing from filter base (C).
Install the 445-0939 Fuel Filter Element into the housing and install onto the engine.