COUPLER GP- 4716959 - Caterpillar

PROBLEM
The existing injector harness is to long and can rub against the cylinder head on certain 621H, 623H, and 627H Wheel Tractor-Scrapers. If the existing harness rubs against the cylinder head it can cause a short or open on the injector circuit, and a fault code to log.
AFFECTED PRODUCT
Model Identification Number
621H DBK00101-00127
623H DBF00102-00115
627H DBW00102-00172
PARTS NEEDED
Qty
Part Number Description
1 3968854 HARNESS AS-ENG
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 15% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.
ACTION REQUIRED
Replace the current harness with a 3968854 Injector Harness. Refer to the attached Rework Procedure.
SERVICE CLAIM ALLOWANCES
Product smu/age whichever comes first Caterpillar Dealer Suggested Customer Suggested
Parts % Labor Hrs% Parts % Labor Hrs% Parts % Labor Hrs%
0-5000 hrs,
0-36 mo 100.0% 100.0% 0.0% 0.0% 0.0% 0.0%
This is a 2.0-hour job
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Rework Procedure
Harness Removal
1. Clean off the top of the engine enough to remove the valve covers and keep dirt and debris from entering the engine.
2. Disconnect the electrical plugs from the engine brakes and injectors.
3. Remove the C-clip securing the injector harness to the valve cover base, and remove the harness completely from the engine.
Harness Install
1. Insert the external plug through the valve cover base, and install the retaining clip that was previously removed.
2. Secure the harness to the valve cover base using the previously removed screws.
Keep the mounting tabs straight as they are tightened down. If these tabs turn it can cause the injector wires to contact the valve springs or cylinder head.
Image1.2.1
3. Connect the harness to each injector, and verify that none of the wiring is touching any other components.
4. Connect the engine brakes to the harness.
5. Secure the wiring to the top of the brakes using the preinstalled clips, as shown below.
6. Reinstall the valve cover.
Image1.3.1