PSP FOR REPEAT TRACK JOINT FAILURES (LEAKS) ON D8N TRACTORS - PS0430 - MAILED CACO Caterpillar

A-46
4169, 4175   PS0430
NOTE: This Program can only be administered when a failure occurs after
the stated warranty period. The decision whether to apply the
Program is made by the dealer. When reporting the repair, use
"PS0430" as Part Number, "7755" as Group Number, "96" as
Description Code, and the Track Serial Number in the 20 spaces of
Findings/Comments.

January 31, 1991

The tracks on certain D8N Tractors may develop dry joints before an
acceptable service life has been achieved or before time to turn the
bushings. Caterpillar will participate to assure acceptable track joint
performance as long as certain guidelines and criteria are met. The
participation will be on a "one time only" basis for each track chain.
This program is intended to address dealer and user concerns for failures on
machines operating in normal applications, equipped with proper track shoes,
and not being abused.

Model Identification Number
D8N 9TC1-UP
PARTICIPATION EXCLUSIONS
1. This program does not apply to repairs completed during the stated
warranty period. Such failures should be treated as machine or
replacement parts warranty, and this program should not be used. Field
repairs are not a part of this program because field repairs are usually
made at low hours, limited to 1 or 2 joints, and occur during the normal
warranty period.
2. No participation will be considered by Caterpillar unless the track
chain is permanently marked for identification as described on the
attached sheet and inspected according to the attached sheet. The track
chain serial number must be included in the failure summary section of
each claim. A copy of the inspection form must be submitted with the
claim. The dealer should retain the original copy for future reference
in the event Caterpillar requests additional information.
MARKING PROCEDURE
1. No participation will be considered by Caterpillar unless, at the first
repair, a permanent serial number uniquely identifying the track is
stamped or welded on the second full right-hand link from the pin end of
the master link. Dealer may use any numbering system up to eight
characters to identify the track. For example, KEMCL100 or KC1. See
the Illustration.
****** IMAGE: SEBE4280.00001.001
CAPTION:
If possible, dealer should use the factory serial number stamped on the
second full righthand link from the pin end of the master link.
Caterpillar prefers this number since it identifies the production date
of the track. The serial number must be included in the comments
section of each claim.
2. No participation will be considered by Caterpillar unless a copy of the
attached form is completely filled out including both the track serial
number and track hours. The form must be retained by the dealer for
future use by the dealer or Caterpillar. These forms will be requested
by Caterpillar from time to time.
LIMITS OF PARTICIPATION
1. 6,000 hours of operation or 2 years, whichever comes first.
2. 100% link and/or bushing wear.
3. One claim per tractor.
4. 100% participation on specified parts at the bushing turn.*
* At bushing turn, no participation for labor, rubber stoppers, or plastic
plugs will be considered since they are considered normal customer
expense at bushing turn. Participation for parts will include new pins.
bushings, thrust rings, and seal assemblies on dry joints. Links should
be reused.
5. 100% participation on specified parts and labor where bushings are not
turned. **
** Participation for parts will include new pins, bushings, seal
assemblies, thrust rings, stoppers, and plugs. Links should be reused.
Labor will include track disassembly and assembly only.
If you determine a link assembly is not reusable, contact your service
representative to determine whether Caterpillar will participate.
REPAIR CONDITION CRITERIA
The dealer must select one of the two repair conditions according to the
following criteria.
Condition 1 - Bushing to link wear ratio determines the bushings will be
turned. In most cases, the tractor will run to the bushing
turn before pitch extension reaches the 6 mm (.25") limit.
Condition 2 - The bushing to link wear ratio determines the track will not be
turned and there are three or more dry joints exceeding 6 mm
(.25") pitch extension.
NOTE: If repeat failures occur after application of this Program and
within the 6000 hour or 2 year limit, contact your service
representative to determine whether Caterpillar will participate.

Condition 1 - Repair dry joints in the dealer track shop at the bushing turn.
Use Undercarriage Reconditioning Bulletin SEBF8557 for proper
repair procedures. Use Guidelines For Undercarriage Parts
Reusability SEBF8558 to determine the necessary parts to
replace. In most cases, link counterbores should be cleaned up
and links reused.
Condition 2 - Completely disassemble entire track and replace all necessary
parts at the dealer track shop. In some cases, dry joints will
be found in addition to those exceeding the 6 mm (.25") pitch
extension. Use Undercarriage Reconditioning Bulletin
SEBF8557 for proper repair procedures. Use guidelines for
undercarriage parts reusability SEBF8558 to determine the
necessary parts to replace. In most cases, link counterbores
should be cleaned up and links reused.

 - Use As Required
7G4332 Stopper-Rubber
6Y0473 Plug
6Y1063 Seal Assembly
6Y1221 Seal Set
6Y3914 Bushing-Track
9W5587 Pin-Track

List on the claim only those new parts needed to make repair authorized in
this service letter. The track serial number as previously described in the
Participation Exclusions Section of this service letter must be included in
the comments section on each claim submitted. Dealer must retain a completed
copy of the attached inspection form for each claim. No participation in
this Program will be possible without this inspection data which must be
completely filled out.
Caterpillar Dealer Suggested Customer Suggested
Option # Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
(D/N)* (Cost)  (C/L) (Sell)
1 100% 0 0 -- 0 0
2 100% 18 0 0 0
* Under Condition 1 at bushing turn, no participation for rubber stoppers or
plastic plugs will be considered. They are considered normal customer
expense at the bushing turn.
DRY JOINT DETECTION
The only positive means of determining whether a dry track joint has
developed is when pitch extension occurs. Hot, squeaking, and/or kinking
joints are only indicators of potential dry joints. The decision to remove
the track from the machine should be based on pitch extension only. Allow
the pitch to extend 6 mm (.25") before track removal.

All parts removed (with the exception of cores used for Caterpillar
Remanufactured parts) should be rendered useless and scrapped immediately
upon completion of the repair.
Attach. (1-Track Inspection Form)
TRACK INSPECTION FORM
TRACK SERIAL NUMBER...............
A) DEALER CODE ............... H) EMPLOYEE ID ................
B) DATE (MMDDYY) ............. I) PART NO. RESPONSIBLE .......
C) CUSTOMER .................. J) QUANTITY ...................
D) MODEL ..................... K) DESCRIPTION CODE ...........
E) TRACTOR S/N ............... L) GROUP NO. ..................
F) MACH HOURS ................ M) INOPERABLE CODE (Y/N) ......
G) TRACK HOURS ............... O) WORK ORDER NO. .............
PPR (Y/N) ..... LINK PART NO. ....
SHOP OR FIELD REPAIR?........ COMPLETE TRACK DISASSEMBLY (Y/N).....
TURNED? (Y/N).....
MEASUREMENTS
DIMENSION % WORN
LINK ...................... SHOE WIDTH ......................
BUSHING ...................
SCALE ..................... REGROUSERED? YES / NO
SHOE ......................
NUMBER OF:
(BEFORE DISASSEMBLY)  (AFTER DISASSEMBLY)
DRY JOINTS ..................... DAMAGED LINKS ...................
LOW JOINTS (LESS THAN 3 IN.).... GALLED PINS .....................
CRACKED LINKS .................. BROKEN PINS .....................
CRACKED SHOES .................. CRACKED BUSHINGS ................
BUSHINGS WALKING ............... GROVED BUSHINGS .................
DAMAGED SPLIT LINKS? YES/NO PART NUMBER OF SEAL REMOVED ........
REPAIR OPTIONS A. FLOOR REPAIR B. RESEAL C. TURN PINS & BUSHINGS
D. REGROUSER E. PRORATE F. SCRAP-NO WARRANTY
REASON TRACK WAS REMOVED ...........................................
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COMMENTS: ..........................................................
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