Procedure For Replacing The Engine Interface Box Harness On Certain G3500B Engines{4460, 7426} Caterpillar

Engine:

G3508B (S/N: RBK1-UP)

G3512B (S/N: JHH1-UP)

G3516B (S/N: N6E1-UP; JEF1-UP)

Petroleum Engine:

G3520B (S/N: TPC1-UP)

Introduction

The Special Instruction that follows covers the replacement of the 432-4214 Receptacle As . Be sure to read and understand the entire Special Instruction before performing any of the procedure or ordering parts.

Required Parts

Installation Procedure

Engines with Potted Style Connectors

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Illustration 1	g03856100
(1) 394-1129 Box Harness As (2) 138-4730 Ring Nut (3) 9X-6258 Screws (4) 9X-8486 Screws (5) 6D-5801 Locknuts (6) 4B-4863 Washers

1. Remove four locknuts (5) with four washers (6) from the inside of the engine interface box as shown in Illustration 1.

2. Remove four screws (4) from the outside of the interface box.

3. Remove four screws (3) from the bottom of the interface box.

4. Remove ring nut (2) from the inside of the interface box.

5. Remove box harness assembly (1) .

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Illustration 2	g03856100
(1) 394-1129 Box Harness As (2) 138-4730 Ring Nut (3) 9X-6258 Screws (4) 9X-8486 Screws (5) 6D-5801 Locknuts (6) 4B-4863 Washers

6. Install box harness assembly (1) .

7. Secure the bottom connector in the interface box using ring nut (2) with four screws (3) .

8. Secure the side connector in the interface box using four screws (4) with eight washers (6) and four locknuts (5) .

Engines with Non-Potted Style Connectors

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Illustration 3	g03857533
(1) 9X-6258 Screws (2) 434-4214 Connector As

1. Remove four screws (1) from connector assembly (2) .

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Illustration 4	g03857536
(2) 434-4214 Connector As (3) 138-4730 Ring Nut (4) 138-4731 Gasket (5) 233-9227 Sockets

2. Remove ring nut (3) in order to remove connector assembly (2) with gasket (4) .

3. Remove the wires one by one if possible to inspect for corrosion of the sockets.

4. If corrosion is detected, cut the wire as close to the socket as possible. Install a new socket (5) onto the wire. Install the wire into the new connector assembly (2) .

5. Install the connector assembly with a new gasket (4) back into the engine interface box.

Interconnect Connector Wiring

Table 2 below contains the locations of the wiring for the interconnect connector.