Before/After
| PRODUCT SUPPORT PROGRAM FOR REPLACING THE HYDRAULIC MOTOR FOR THE COOLING FAN AND INSTALLING A CHECK VALVE AND A NEW DIVERTER VALVE IN THE HYDRAULIC CONTROL SYSTEM FOR THE COOLING FAN ON CERTAIN 725, 730, AND 730 EJECTOR ARTICULATED TRUCKS |
| 1386 5061 5066 4286 |
PS42820 |
| NOTE: |
This Program must be administered either before or after failure.
In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS42820" as the Part Number
and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and "T" as the SIMS Description code.
If administered after failure, use "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code. |
| NOTE: |
The information supplied in this service letter may not be valid after the termination date of this program.
Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst. |
| The existing hydraulic motor (part number 320-6603) for the cooling fan may have excessive internal oil bypass on certain 725, 730, and 730 Ejector Articulated Trucks. Low brake pressure warnings may be incorrectly recorded and excessive noise and vibration may be noticed from the hydraulic lines for the cooling fan on these machines. The low brake pressure warnings may occur on machines that are operating in high ambient conditions. |
Qty |
Part Number |
Description |
|
*******Group 1*******
|
| 1 |
2P1314 |
CONNECTOR |
| 2 |
3J1907 |
SEAL-O-RING |
| 1 |
3J7354 |
SEAL-O-RING |
| 1 |
3K0360 |
SEAL-O-RING |
| 2 |
4J7533 |
SEAL-O-RING |
| 2 |
6V0394 |
CONNECTOR-PORT |
| 1 |
6V8397 |
SEAL-O-RING |
| 1 |
6V9508 |
PLUG-FACE SEAL |
| 1 |
7J4026 |
ELBOW |
| 2 |
7K1181 |
STRAP-CABLE |
| 2 |
7X2534 |
BOLT |
| 2 |
8T4121 |
WASHER-HARD |
| 2 |
8T4186 |
BOLT |
| 2 |
9X8256 |
WASHER |
| 1 |
0307946 |
ELBOW |
| 1 |
0308193 |
CONNECTOR-FLARED |
| 3 |
2231353 |
HOSE AS |
| 1 |
2406746 |
MOTOR GP-GR BSC |
| 1 |
3220596 |
VALVE GP-CHECK |
| 1 |
3221453 |
BODY |
| 1 |
3234814 |
BRACKET AS. |
| 1 |
3264489 |
VALVE GP-DVTR-C |
| In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 9% 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. |
|
*******Group 2*******
|
| 1 |
2P1314 |
CONNECTOR |
| 2 |
3J1907 |
SEAL-O-RING |
| 1 |
3J7354 |
SEAL-O-RING |
| 1 |
3K0360 |
SEAL-O-RING |
| 2 |
4J7533 |
SEAL-O-RING |
| 2 |
6V0394 |
CONNECTOR-PORT |
| 1 |
6V8397 |
SEAL-O-RING |
| 1 |
6V9508 |
PLUG-FACE SEAL |
| 1 |
7J4026 |
ELBOW |
| 2 |
7K1181 |
STRAP-CABLE |
| 2 |
7X2534 |
BOLT |
| 2 |
8T4121 |
WASHER-HARD |
| 2 |
8T4186 |
BOLT |
| 2 |
9X8256 |
WASHER |
| 1 |
0307946 |
ELBOW |
| 1 |
0308193 |
CONNECTOR-FLARED |
| 3 |
2231353 |
HOSE AS |
| 1 |
2406746 |
MOTOR GP-GR BSC |
| 1 |
3220596 |
VALVE GP-CHECK |
| 1 |
3221453 |
BODY |
| 1 |
3234814 |
BRACKET AS. |
| In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 9% 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. |
Refer to the Service Manual and the attached Rework Procedure to install the new parts.
The motor for the hydraulic fan can be replaced with an alternative design motor.
A check valve can be added to the pilot oil control system for the cooling fan. Installing the check valve will prevent incorrect low brake charging pressure warnings.
A new diverter valve prevents noise and vibration in the hydraulic lines for the cooling fan. |