PRODUCT IMPROVEMENT PROGRAM FOR INSPECTION AND POSSIBLE REPLACEMENT OF THE ENGINE OIL SCAVENGE PUMP MOUNTING BOLTS ON CERTAIN C175-16 ENGINES INSTALLED IN 793F OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR INSPECTION AND POSSIBLE REPLACEMENT OF THE ENGINE OIL SCAVENGE PUMP MOUNTING BOLTS ON CERTAIN C175-16 ENGINES INSTALLED IN 793F OFF-HIGHWAY TRUCKS

Usage:

REBE6498-02

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22Oct2010

(Revised 24Jan2011)

U-430

A-347

D-373

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*Priority*	PRODUCT IMPROVEMENT PROGRAM FOR INSPECTION AND POSSIBLE REPLACEMENT OF THE ENGINE OIL SCAVENGE PUMP MOUNTING BOLTS ON CERTAIN C175-16 ENGINES INSTALLED IN 793F OFF-HIGHWAY TRUCKS
1312 1302		PI31815

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NOTE:

This Program must be administered as soon as possible. When reporting the repair, use "PI31815" 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 "PI31815" 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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NOTE:	This Revised Service Letter replaces the 22Oct2010 (Revised 20Jan2011) Service Letter. Changes have been made to the Rework Procedure to correct the reference in Step 2. "Proceed to Step 8 of the procedure" was changed to "Proceed to step 5 of the procedure".

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COMPLETION DATE	TERMINATION DATE
30Apr2011	31Oct2011

PROBLEM

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The engine oil scavenge pump mounting bolts on certain C175-16 engines installed in 793F off-highway trucks may have inadequate torque that may lead to a failure of the pump mounting system.

AFFECTED PRODUCT

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Model	Identification Number
793F	SSP00115, 118-142, 144-146, 148-157, 159-168, 172

PARTS NEEDED

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Qty	Part Number	Description
1	3P0651	SEAL-O-RING
1	4C9614	SEALANT-SILICONE
1	5P8861	SEAL-O-RING
2	6V1196	SEAL-O-RING
1	6V3835	SEAL-O-RING
1	1076280	SEAL-O-RING
1	1121579	SEAL-O-RING
2	1608494	BOLT-HEX HEAD (As Required)
2	1776911	SEAL-O-RING
1	2436444	GASKET-OIL PAN
4	2697885	SEAL-O-RING
2	2752200	BOLT-HEX HEAD (As Required)
1	3032236	SEAL-INTEGRAL
4	3193527	WASHER-HARD (As Required)
1	3400715	GROMMET
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 45% 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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Inspect and verify the torque on the four engine oil scavenge pump bolts at the first available time.

- If any one of the 4 bolts are not at the minimum allowable torque (refer to the the attached Rework Procedure), replace all four bolts and washers.

- If all four bolts are at the correct torque, no further action is required.

For inspection details, refer to the attached Rework Procedure.

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OWNER NOTIFICATION

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U.S. and Canadian owners will receive the attached Owner Notification.

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 30.0-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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COPY OF OWNER NOTIFICATION FOR U.S. AND CANADIAN OWNERS

XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999

PRIORITY - INSPECTION OF THE ENGINE OIL SCAVENGE PUMP MOUNTING BOLTS ON C175-16 ENGINES

MODELS INVOLVED - 793F Off-Highway Truck

Dear Caterpillar Product Owner:

The engine oil scavenge pump mounting bolts need to be inspected on the products listed below. The existing bolts may have inadequate torque and could cause the pump mounting system to fail. You will
not be charged for the service performed.

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

Please refer the dealer to their Service Letter dated 22Oct2010 when scheduling this service.

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

Caterpillar Inc.

Identification #(s)

Attached to 22Oct2010 Service Letter

Rework Procedure

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Refer to the C175 Disassembly & Assembly manual (KENR6052) for instructions on removal and installation of the oil pan.

1. Remove the engine oil pan.

2. Perform a static torque check on the two 160-8494 Bolts and the two 275-2200 Bolts that mount the scavenge oil pump (Image 1.1.1). The bolts should not move when a tightening torque of 80 Nm is applied.

Image1.1.1

- If the static torque check DID NOT result in bolt movement, no further action is required. Proceed to step 5 of the procedure.

- If the static torque check DID result in bolt movement, proceed to Step 3.

3. Replace the four mounting bolts and washers with new bolts and washers.

NOTE: When each bolt is removed and prior to installing the new bolt, inspect the scavenge pump mounting feet to ensure there are no cracks initiating from the bolt hole.

4. Inspect the scavenge pump drive gear and crankshaft gear for any damage.

5. Install the oil pan.