PSP FOR REPLACING THE STUB SHAFT & BEARING AS. IN THE 4N1092 REAR BALANCER GROUP ON CERTAIN 631E, 637E, 657E SCRAPERS; 768C TRA CTORS; 769C TRUCKS; 3408 INDUSTRIAL, MARINE, SPARK-IGNITED, & GENERATOR SET ENGINES - PS4572 - MAILED US, CANADA, CACO, BR Caterpillar


PSP FOR REPLACING THE STUB SHAFT & BEARING AS. IN THE 4N1092 REAR BALANCER GROUP ON CERTAIN 631E, 637E, 657E SCRAPERS; 768C TRA CTORS; 769C TRUCKS; 3408 INDUSTRIAL, MARINE, SPARK-IGNITED, & GENERATOR SET ENGINES - PS4572 - MAILED US, CANADA, CACO, BR

Usage:

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Caterpillar: Confidential Yellow

PSP FOR REPLACING THE STUB SHAFT & BEARING AS. IN THE 4N1092 REAR BALANCER GROUP ON CERTAIN 631E, 637E, 657E SCRAPERS; 768C TRA CTORS; 769C TRUCKS; 3408 INDUSTRIAL, MARINE, SPARK-IGNITED, & GENERATOR SET ENGINES - PS4572 - MAILED US, CANADA, CACO, BRAZIL , CFEL, COSA, MARINE TEPS, 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-23
A-16
AU-12.1
B-3
E-19
O-22
TM-6
1220   PS4572
NOTE: This Program can be administered either before or after a
failure. In either case the decision whether to apply the Program
is made by the dealer. When reporting the repair, use "PS4572"
as Part Number, "7755" as Group Number, and "96" as Description
Code.

Termination Date

February 29, 1992

Problem

The surface finish of the stub shaft in the 4N1092 Rear Balancer Group of
certain 631E, 637E, and 657E Scrapers; 768C Tractors; 769C Trucks; and 3408
Industrial, Marine, Spark-Ignited, and Generator Set Engines may not be as
smooth as specifications require. A surface that is not smooth enough can
reduce the service life of the bearing in the gear assembly.

Affected Product

Model Identification Number
631E 05A9833
1AB1385-1403, 1408
637E 1FB512-514
657E 91Z398, 403, 405-407, 420
768C 02X369, 370
769C 01X5436, 5438-5454, 5457-5548, 5553, 5557, 5559, 5562, 5563,
5566
3408 6NB804-818
67U13987-14078, 14080-14085, 14087, 14088, 14090-14093, 14097-
14104, 14107-14109, 14111, 14115, 14117
99U6873-6914, 6916, 6917
78Z3958-4020, 4022-4025, 4027, 4029, 4031-4033, 4035, 4037-4039

Parts Needed

1 - 4N1015 Bearing
1 - 4N1151 Gasket (Oil Pan)
1 - 7N9331 Gasket (Flywheel Housing)
1 - 1W4449 Shaft
1 - 2W1734 Seal (Crankshaft/Rear)

Action Required

Follow the procedures in the Service Manual. Where appropriate, the engine
will need to be removed from the vehicle. Remove the flywheel housing and
the 4N1092 Rear Balancer Group. Replace the 1W4449 Shaft and the 4N1015
Bearing (part of 4N1018 Gear Assembly).

Service Claim Allowances

Product Caterpillar Dealer Suggested Customer Suggested
smu/age Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
whichever (D/N) (Cost)  (C/L) (Sell)
comes
first
**** 768C Tractors and 769C Trucks ****
0-4000 100% 35 - 35 - -
0-24 mo
4001-6000 33 1/3% 17.5 - 17.5 50% 35
25-36 mo
NOTE: This is a 70-hour job.
**** 631E, 637E, and 657E Scrapers ****
0-4000 100% 40 - 40 - -
0-24 mo
4001-6000 33 1/3% 20 - 20 50% 40
25-36 mo
NOTE: This is an 80-hour job.
Product Caterpillar Dealer Suggested Customer Suggested
smu/age Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
whichever
comes
first
**** 3408 Industrial, Generator Set, and SI Engines ****
0-4000 100% 10 - - - -
0-24 mo
4001-6000 100% 5 - - - 5
25-36 mo
NOTE: This is a 10-hour job.
**** 3408 Marine Engines ****
0-4000 100% 29 - - - -
0-24 mo
4001-6000 100% 15 - - - 14
25-36 mo
NOTE: This is a 29-hour job.

Parts Disposition

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

Caterpillar Information System:

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PSP FOR REPLACING LEAKING EXHAUST GAS INLET HOUSINGS ON CERTAIN 3606, 3608, 3612, AND 3616 ENGINES - PS0457 - MAILED US AND CANADA, CACO, COFA, BRAZIL, LIMITED COSA, LIMITED CFEL PSP FOR REPLACING LEAKING EXHAUST GAS INLET HOUSINGS ON CERTAIN 3606, 3608, 3612, AND 3616 ENGINES - PS0457 - MAILED US AND CANADA, CACO, COFA, BRAZIL, LIMITED COSA, LIMITED CFEL
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Product Support Program For Replacing Cracked Cylinder Blocks On Certain 3306B Truck Engines Product Support Program For Replacing Cracked Cylinder Blocks On Certain 3306B Truck Engines
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PSP FOR INSTALLING A NEW 7C7557 VOLTAGE REGULATOR ON CERTAIN 3114, 3116, 3208, 3306, AND 3406 GENERATOR SET ENGINES (BSSB) EQU IPPED WITH A SR4 GENERATOR - PS4538 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA - REVISED 01/91 PSP FOR INSTALLING A NEW 7C7557 VOLTAGE REGULATOR ON CERTAIN 3114, 3116, 3208, 3306, AND 3406 GENERATOR SET ENGINES (BSSB) EQU IPPED WITH A SR4 GENERATOR - PS4538 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA - REVISED 01/91
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