PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE 459-2597 STEERING PRESSURE SWITCH ASSEMBLY ON CERTAIN 725C2, 740, 740 EJ, AND 745 ARTICULATED TRUCKS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE 459-2597 STEERING PRESSURE SWITCH ASSEMBLY ON CERTAIN 725C2, 740, 740 EJ, AND 745 ARTICULATED TRUCKS

Usage:

TEBE8990-00

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04Apr2019

U-208

A-178

D-183

O-189

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Priority	PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE 459-2597 STEERING PRESSURE SWITCH ASSEMBLY ON CERTAIN 725C2, 740, 740 EJ, AND 745 ARTICULATED TRUCKS
1408		PI33011

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NOTE:

Caterpillar’s obligations under this Service Letter are subject to, and shall not apply in contravention of, the laws, rules, regulations, directives, ordinances, orders, or statutes of the United States, or of any other applicable jurisdiction, without recourse or liability with respect to Caterpillar.

NOTE:

This Program must be administered as soon as possible. When reporting the repair, use "PI33011" as the Part Number and "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description code. Exception: If the repair is done after failure, use "PI33011" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.

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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.

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COMPLETION DATE	TERMINATION DATE
31Oct2019	30Apr2020

PROBLEM

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The existing 459-2597 Steering Pressure Switch Assembly needs to be replaced on certain 725C2, 740, 740 EJ, and 745 Articulated Trucks. The existing 459-2597 Steering Pressure Switch Assembly could fail, which could activate the secondary steer pump electric motor.

AFFECTED PRODUCT

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Model	Identification Number
725C 2	2T300802-00804
740	3F800062, 64
740 EJ	3F700284
745	3F601335, 1337, 1339-1341, 1343, 1345, 1347, 1350 3T601685-01686, 1688-1690, 1693-1694, 1698-1700, 1703-1704, 1707, 1715-1716, 1720, 1725, 1737, 1742, 1745, 1749, 1754, 1760, 1776, 1778, 1780, 1792

PARTS NEEDED

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Qty	Part Number	Description
1	3K0360	SEAL-O-RING
2	3S2093	STRAP-CABLE
1	7K1181	STRAP-CABLE
1	3135104	SWITCH AS-PRESS
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 42% 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

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Refer to the attached Rework Procedure.

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OWNER NOTIFICATION

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Owners in the following countries will receive the attached Owner Notification:
US
Canada

SERVICE CLAIM ALLOWANCES

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Caterpillar		Dealer Suggested		Customer Suggested
Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
100%	100%	0%	0%	0%	0%

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NOTE: This is a 1.0-hour job

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PARTS DISPOSITION

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Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.

MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.

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EXAMPLE COPY OF OWNER NOTIFICATION

XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999

PRIORITY - PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE 459-2597 STEERING PRESSURE SWITCH ASSEMBLY

MODELS INVOLVED - CERTAIN 725C2, 740, 740 EJ, AND 745 ARTICULATED TRUCKS

Dear Cat Product Owner:

The existing 459-2597 Steering Pressure Switch Assembly needs to be replaced on the products listed below. The existing 459-2597 Steering Pressure Switch Assembly could fail, which could activate the secondary steer pump electric motor. You will not be charged for the service performed.

Contact your local Cat dealer immediately to schedule this service. The dealer will advise you of the time required to complete this service.

If you are no longer the owner of this product(s), please contact your local Cat dealer so that our records can be updated. Please refer the dealer to their Service Letter dated 04Apr2019 when scheduling this service.

We regret the inconvenience this may cause you, and urge you to have this service performed as soon as possible to prevent unscheduled downtime.

Caterpillar Inc.

Identification #(s)

Attached to 04Apr2019 Service Letter

Rework Procedure

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Rework Procedure for Replacement of the Existing Supplementary 459-2597 Steering Pressure Switch Assembly.

Refer to the Parts Needed in Image1.1.1.

Image1.1.1

Refer to Image1.2.1 for the location of 514-7372 Combination Valve Group on the left side of machine, with the cab raised.

Image1.2.1

Rework Procedure for 725C2 Machines:

Tilt the cab to gain access and fit the cabin brace to carry out the switch replacement. Note that some components have been removed from the images for clarity.

1. Park the machine on a flat solid ground, move the transmission lever to "parking brake", release the hydraulic pressure, turn off the engine, remove the key, disconnect the main switch etc.

2. Remove the existing two cable straps. Refer to Image1.3.1.

Image1.3.1

3. Disconnect the electrical connector from the harness. Refer to Image1.4.1.

Image1.4.1

4. Remove the existing 459-2597 Pressure Switch Assembly. Note that a small amount of fluid will be lost during this operation; ensure that spillages are captured and any residual fluid cleaned from the machine. Refer to Image1.5.1.

Image1.5.1

5. Ensure that the new 313-5104 Pressure Switch Assembly is fitted with a new 3K-0360 O-Ring Seal. Refer to Image1.6.1.

6. Install the 313-5104 Pressure Switch Assembly to port SW1 on the hydraulic block.

7. Tighten the 313-5104 Pressure Switch Assembly to a specified torque of 75 N.m +/- 5 N.m.

8. Connect the electrical connector to the harness.

9. Secure the electrical connector and harness to the bracket using a new 7K-1181 Cable Strap. Refer to Image1.6.2.

Image1.6.1

Image1.6.2

10. Secure the cable to the switch body using a new 3S-2093 Cable Strap. Refer to Image1.7.1.

Image1.7.1

Procedure for 740GC, 740 EJ and 745 Machines:

Tilt the cab to gain access to carry out the switch replacement. Note that some components have been removed from the images for clarity.

1. Park the machine on a flat solid ground, move the transmission lever to "parking brake", release the hydraulic pressure, turn off the engine, remove the key, disconnect the main switch etc., raise the cab, and fit the cabin brace.

2. Remove the existing two cable straps. Refer to Image1.8.1.

Image1.8.1

3. Disconnect the electrical connector from the harness. Refer to Image1.9.1

Image1.9.1

Image1.10.1

5. Ensure that the new 313-5104 Pressure Switch Assembly is fitted with a new 3K-0360 O-Ring Seal. Refer to Image1.11.1.

6. Install the 313-5104 Pressure Switch Assembly to port SW1 on the hydraulic block.

7. Tighten the 313-5104 Pressure Switch Assembly to a specified torque 75 N.m +/- 5 N.m.

8. Connect the electrical connector to the harness.

9. Secure the cable to the switch body using a new 3S-2093 Cable Strap. Refer to Image1.11.2.