PRIORITY - THE BOLTS THAT HOLD THE DIFFERENTIAL PINION IN PLACE MAY WORK LOOSE ON CERTAIN 623E WHEEL TRACTORS - PI3500 - MAI LED US AND CANADA, COSA, LIMITED COFA Caterpillar

PRIORITY - THE BOLTS THAT HOLD THE DIFFERENTIAL PINION IN PLACE MAY WORK LOOSE ON CERTAIN 623E WHEEL TRACTORS - PI3500 - MAI LED US AND CANADA, COSA, LIMITED COFA

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Caterpillar: Confidential Yellow

PRIORITY - THE BOLTS THAT HOLD THE DIFFERENTIAL PINION IN PLACE MAY WORK LOOSE ON CERTAIN 623E WHEEL TRACTORS - PI3500 - MAI LED US AND CANADA, COSA, LIMITED COFA

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.


U-256
AU-160.1
O-197
PRIORITY
3254, 3258  PI3500
COMPLETION DATE

Termination Date

June 30, 1991  December 31, 1991

Problem

The bolts that hold the differential pinion in place may work loose on
certain 623E Wheel Tractors. New bearings and related parts need to be
installed and the preload needs to be reset.

Affected Product

Model Identification Number
623E 6YF1-123

Parts Needed

Dealers will need to order parts for this Program.
1 - 3D1968 Seal
1 - 3D1969 Ring
1 - 8F8861 Seal
1 - 8S9075 Cone
1 - 8S9076 Cup
8 - 8X1061 Shim
6 - 8X1062 Shim
1 - 8X1118 Retainer
6 - 310223 Bolt

Action Required

1. Follow the procedures in the Service Manual to remove the transfer
gears, torque converter, and transmission as a unit.
2. Remove the six bolts, shims, pinion, retainer and bearing.
3. Install the new parts except for the 3D1969 Ring. After setting the
preload on the bearings, install the 3D1969 Ring.
4. Install the transfer gears, torque converter, and transmission as a
unit.
****** IMAGE: SEBE4478.00001.001
CAPTION: Location of Parts

Owner Notification

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

Service Claim Allowances

Caterpillar Dealer Suggested Customer Suggested
Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
(D/N) (Sell)   (C/L) (Sell)
100% 9 0 0  0 0
NOTE: This is a 9-hour job

Parts Disposition

Any parts removed (with the exception of cores used for Caterpillar
Remanufactured parts) can be rendered useless and scrapped immediately upon
completion of the repair.
MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.
Attach. (1-Owner Notification)
COPY OF

Owner Notification

 FOR U.S. AND CANADIAN OWNERS
XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999
PRIORITY - The Bolts That Hold The Differential Pinion In Place May Work
Loose On Certain 623E Wheel Tractors
MODELS INVOLVED - 623E Wheel Tractors
Dear Caterpillar Product Owner:
The bolts that hold the differential pinion in place may work loose on the
products listed below. New bearings and related parts need to be installed
and the preload needs to be reset. The repair will be done at no cost to
you.
Contact your local Caterpillar dealer immediately and schedule a time to have
this service performed. The repair time for this service is approximately
nine hours.
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 December 24, 1990 Service Letter