PSP FOR REPEAT TRACK JOINT FAILURES (LEAKS) ON D8N TRACTORS - PS0430 - MAILED COFA, CFEL, COSA Caterpillar

AU-10
E-10
O-14
4169, 4175   PS0430
NOTE: This Program can only be administered after a failure
occurs. 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, and "96"
as Description Code.

January 31, 1991

The tracks on certain D8N Tractors may develop dry joints before an
acceptable service life has been achieved. Caterpillar will participate to
assure acceptable track joint performance as long as certain guidelines and
criteria are met. 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. 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. 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.
****** IMAGE: SEBE4208.00001.001
CAPTION:
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 3 years, whichever comes first.
2. 100% link and/or bushing wear.
3. 100% labor and parts participation through the first complete track
disassembly (excluding bushing turn*).
4. 50% labor and parts participation after the first complete track
disassembly (excluding bushing turn*).
5. Link assembly participation if link assembly has been previously
completely disassembled two or more times.
*A bushing turn will be considered a complete track disassembly. At
bushing turn, no participation for labor, track seals, rubber stoppers,
or plastic plugs will be considered. They are normal customer expenses
at bushing turn. All track seals require replacement when the track is
completely disassembled.
REPAIR OPTION SELECTION CRITERIA
Prior to selection of repair options, it is important to refer to page 5 "Dry
Joint Detection." The following options should not be used until actual
pitch extension has reached 6 mm (.25"). In many cases, the D8N may run to
bushing turn with no pitch extension even after loss of lubrication.
Dealers must select 1 of 3 repair options according to the following
criteria:
Option 1 - Track has developed dry joints for the first time
and there are no more than 2 dry joints.
Option 2 - Track has developed 3 or more dry joints and/or a
claim against the track has previously been
submitted under Option 1.
Option 3 - Track has developed 3 or more dry joints and 2 or
more claims against the track have been submitted
under Option 2.

Option 1
a. Repair individual joints at the job site or at the dealer track shop.
Use Undercarriage Reconditioning Special Instructions SEHS8957 for
proper repair procedures.
Option 2
a. Completely disassemble entire track and replace all seals and other
necessary parts at the dealer track shop. Use Undercarriage
Reconditioning Bulletin SEBF8557 for proper repair procedures. Use
Guidelines For Undercarriage Parts Reusability SEBF8558 to determine the
necessary parts to replace.
Option 3
a. Replace link assembly with new link assembly. The structural integrity
of a link assembly which has been disassembled 2 or more times
apparently has deteriorated past the point to satisfactorily maintain
adequate track joint performance.

 - 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. Indicate link and bushing wear in on-line claim
story. Forms will be requested by Caterpillar from time to time for analysis
and auditing purposes. Also, dealer can only claim on one option.
NOTE: CEFL Dealers should attach a copy of the Track Inspection Form to
the claim.
Caterpillar Dealer Suggested Customer Suggested
Option # Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
(D/N)* (Cost)  (C/L) (Sell)
1 100% 4 Hrs./Dry 0 -- 0 0
Joint (2 Dry
Joints Max.)
2 100% 18 0 -- 0 0
At 1st
Complete
Disassembly
Caterpillar Dealer Suggested Customer Suggested
Option # Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
(D/N)* (Cost)  (C/L) (Sell)
2 50% 9 50% -- 0 0After 1st
Complete
Disassembly
3 See Service Claim Allowances for Option 3.
* If bushings exceed bushing end groove criteria in Undercarriage Parts
Reusability Guideline SEBF8558, they may be claimed.
At bushing turn, no participation for track seals, rubber stoppers, or
plastic plugs will be considered since they are considered normal customer
expense at bushing turn.
All track seals require replacement when track is completely disassembled.
Service Claim Allowances for Option 3
For replacing an entire link assembly, Caterpillar's participation will be
determined by the greater of percent wear life used or percent of link hours
where 6,000 hours equals 100%. Our computation for this is:
Caterpillar's Participation = D/N Price - Customer Participation
Where:
Customer Participation = Customer List Price X The Greater of Percent Wear or
Percent Hours to 6,000 Hours
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 ...........................................
....................................................................
COMMENTS: ..........................................................
....................................................................
....................................................................
....................................................................
....................................................................