Installation Procedure for 306-8313 Auxiliary Control Wiring Gp {1408} Caterpillar

Excavator:

374D (S/N: PJA1-UP; PAP1-UP)

374D (S/N: PAS1-UP)

374D (S/N: PAX1-UP)

Work Tool:

HYDRAULIC KIT (S/N: HKD1-UP)

Introduction

This Special Instruction provides the information that is necessary to install the 306-8313 Auxiliary Control Wiring Gp on certain excavators. This wiring group can be used with Tool Control auxiliary hydraulics.

Safety Section

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Do not operate or work on this machine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manuals. Failure to follow the instructions or heed the warnings could result in injury or death. Contact your Cat dealer for replacement manuals. Proper care is your responsibility.

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Personal injury or death can result from sudden work tool movement. Sudden movement of the work tool can cause injury to persons near the work tool. To prevent injury or death, make sure that the area around the work tool is clear of personnel and obstructions before operating the work tool.

Illustration 1	g00104545

Attach a "Do Not Operate" warning tag or a similar warning tag to the start switch or to the controls before you service the equipment. These warning tags (Special Instruction, SEHS7332) are available from your Caterpillar dealer.

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Check valves in the hydraulic system may allow pressure to exist in the hydraulic lines after the engine has been stopped. Pressure must be relieved prior to servicing the components of the hydraulic system. Failure to relieve pressure prior to servicing may result in personal injury.

Required Parts

Illustration 2	g02246317
(1) 3S-2093 Cable Strap (2) 7K-1181 Cable Strap (3) 342-2892 Control Harness As (4) 342-2893 Solenoid Harness As (Detail A) Connection to machine auxiliary ECM and harness (Detail B) Connection of harness (3) to harness (4) and to front (retract) solenoid (Detail C) Connection to rear (extend) solenoid

Installation Procedure

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Illustration 3	g02247976
Detail A (2) 7K-1181 Cable Strap (3) 342-2892 Control Harness As (A) Unused connectors (B) Frame hole (C) Auxiliary ECM

1. Connect eight-pin connector of harness (3) to existing machine harness connector containing wires 308-YL, 892-BR, 893-GN, C987-RD and 235-BK.

2. Connect three-pin connector of harness (3) to existing machine harness connector containing wires 253-YL and 263-GN. These connectors each have blue tape around the harness.

   Note: The pair of three pin-connectors opposite each other will not be used and should remain plugged for use in other, optional circuits.

3. Connect brown 54-pin connector to the left-hand port of Auxiliary ECM and tighten retention screw to 6.9 ± 0.35 N·m (61 ± 3.1 lb in).

4. Connect black 54-pin connector to the right-hand port of Auxiliary ECM and tighten retention screw to 6.9 ± 0.35 N·m (61 ± 3.1 lb in).

5. Route the opposite end of control harness (3) along the existing machine harness and through the frame hole (B). Refer to Illustration 3.

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Illustration 4	g02251857
Detail B (3) 342-2892 Control Harness As (4) 342-2893 Solenoid Harness As (B) Harness routing (D) Attachment front (extend) solenoid (E) Harness connection

6. Connect harness (4) to harness (3) at three-pin connectors "E" containing wires P957-BR, P958-PK, and K867-YL.

7. Route harness (4) along existing machine harness. Route connector containing wires K867-YL and P957-BR to the front side of machine valve stack.

8. Plug the connector into the attachment extend solenoid (D). Refer to Illustration 4.

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Illustration 5	g02254895
Detail C (1) 3S-2093 Cable Strap (4) 342-2893 Solenoid Harness As (F) Attachment rear (retract) solenoid

9. Route harness (4) along existing machine harness. Route connector containing wires K867-YL and P958-PK to the back side of machine valve stack.

10. Plug the connector into the attachment retract solenoid (F) .

11. Secure harnesses (3) and (4) to the existing machine harness and clips using cable straps (1) and (2). Refer to Illustration 5.

12. Cut off any excess cable strap ends.