PRIORITY - ROLLER BEARINGS ON THE IDLER SHAFT OF THE AUXILIARY WATER PUMP NEEDS TO BE REPLACED ON CERTAIN 3408B, 3412 SPARK IGN ITED ENGINES - MAILED CFEL, LIMITED US, CANADA, COSA Caterpillar

PRIORITY - ROLLER BEARINGS ON THE IDLER SHAFT OF THE AUXILIARY WATER PUMP NEEDS TO BE REPLACED ON CERTAIN 3408B, 3412 SPARK IGN ITED ENGINES - MAILED CFEL, LIMITED US, CANADA, COSA

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Caterpillar: Confidential Yellow

PRIORITY - ROLLER BEARINGS ON THE IDLER SHAFT OF THE AUXILIARY WATER PUMP NEEDS TO BE REPLACED ON CERTAIN 3408B, 3412 SPARK IGN ITED ENGINES - MAILED CFEL, LIMITED US, CANADA, COSA

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-168.1
E-70
O-102.1
PRIORITY
parts stock action needed
1371  PI3310

Termination Date

October 31, 1989

Problem

The roller bearings for the idler shaft of the auxiliary water
pump can fail, resulting in a loss of water flow to the
aftercooler. The loss of water flow through the aftercooler
may generate excessive inlet air temperatures and cause major
engine damage.

Affected Product

Model Identification Number
3408B SI 6NB550 - 570
3412 SI 7DB344 - 354

Parts Needed

Dealers will need to order parts for this Program.
Parts Stock
1 - 6F5953 Bushing
1 - 9Y7445 Shaft As.
1 - 8L4042 Seal
Affected Product
1 - 6F5953 Bushing
1 - 9Y7445 Shaft As.
1 - 7W5648 Gasket
1 - 8L4042 Seal

Action Required

Parts Stock
Disassemble all 9Y1269 Water Pumps in parts stock according to
the Service Manual.
Machine the idler shaft bearing bore according to the
dimensions shown in the illustration.
Wash the housing and blow air through the oil passages to
remove any machining chips.
Press the 6F5953 Bushing into the idler shaft bore.
Assemble pump using new parts listed. Tighten the 6L1962 Nut
to 60 +- 7.0 N.m (45 +- 5 lb ft).
Affected Product
Remove the auxiliary water pump from the engine and disassemble
the pump according to the Service Manual.
Machine -the idler shaft bearing bore according to the
dimensions shown in the illustration.
Wash the housing and blow air through the oil passages to
remove any machining chips.
Press the 6F5953 Bushing into the idler shaft bore.
Assemble pump using new parts listed. Tighten the 6L1962 Nut
to 60 +- 7 N.m (45 +- 5 lb ft). Install pump on engine.
****** IMAGE: SEBE3902.00001.001
CAPTION:

Owner Notification

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

Service Claim Allowances

Submit one claim for all 9Y1269 Pump Groups in parts stock that
are rebuilt. One hour labor will be allowed for disassembly
and assembly of each affected pump in parts stock.
Caterpillar Dealer Suggested Customer Suggested
Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
(D/N) (Sell)  (C/L) (Sell)
Rework Parts Stock Water Pumps
100% 1 0 0  0 0
Rework Affected Product Water Pumps
100% 2 0 0  0 0
NOTE: An additional two (2) hours are allowed to machine
each pump housing, or dealer may attach an invoice
from a vendor machine shop with claim.

Parts Disposition

Handle the parts in accordance with your Warranty Bulletin on
warranty parts handling.
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 - ROLLER BEARINGS ON IDLER SHAFT OF THE AUXILIARY
WATER PUMP NEEDS TO BE REPLACED
MODELS INVOLVED - 3408B, 3412 Spark Ignited Engines
Dear Caterpillar Product Owner:
The roller bearings for the idler shaft of the auxiliary water
pump can fail, resulting in a loss of water flow to the
aftercooler.
A new idler shaft assembly and bushing needs to be installed.
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 two 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
Identification #(s)
Attached to October 13, 1988 Service Letter