Rework Procedure of the Coolant Level Wiring Harness on Certain G3306B Generator Sets {1408, 4459, 7422, 7938} Caterpillar

Engine

G3306B (S/N: NR41-UP)

Introduction

Do not perform any procedure in this Special Instruction until you have read the information and you understand the information.

This Special Instruction is for installing a separate wiring harness jumper to monitor the Separate Circuit Aftercooler (SCAC) coolant level.

Safety Section

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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.

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High voltage may be present. The power source must be disconnected before working on the equipment. Failure to disconnect the power source could result in injury or death. Verify that the equipment is not energized before performing any maintenance. This work must be performed by trained personnel with correct tools and procedures.

Required Parts

Installation Procedure

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Illustration 1	g06250489
Typical G3306B Engine (1) Coolant sensor harness, connector M-C3

1. Locate and disconnect Connector M-C3 on the coolant sensor harness from the SCAC coolant level sensor.

2. Connect M-C3 on the coolant sensor harness to MA-C1 on the coolant jumper harness.

3. Connect MA-C2 to the SCAC coolant level sensor.

4. Route and secure coolant jumper harness along the coolant sensor harness, engine interface harness, and generator harness.
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   Illustration 2	g06250491
   Typical G3306B Engine (2) Connector Y-C2

5. Insert terminal MA-T3 of the coolant jumper harness into position 37 in the Y-C2 connector.
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   Illustration 3	g06250496
   Typical G3306B Engine (3) Connector G-C14

6. Insert terminal MA-T2 of the coolant jumper harness into position 37 in the G-C14 connector.

7. Route and secure coolant jumper harness along the EMCP harness.

8. Insert terminal MA-T1 of the coolant jumper harness into position 113 in the A-C1 connector.

ECM Configuration

1. Connect to Cat^® Electronic Technician (ET).
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   Illustration 4	g06250516

2. Open the "OCP Configurations".

3. Expand the "Operator Control Panel".
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   Illustration 5	g06250532

4. Select "Digital Inputs".

5. Select "Digital Inputs #2".
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   Illustration 6	g06250535

6. Select "Digital Input #2 Usage Type".

7. Select "System Event" from the "New Value" drop-down box.

8. Click "OK".
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   Illustration 7	g06250538

9. Select "Event Input Function #2 Suspect Parameter Name".

10. Select "Engine Aftercooler Coolant Level".

11. Click "OK".
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    Illustration 8	g06250541

12. Set the "Engine Input Function #2 Event Notification Delay Time" to 5 seconds.