PSP FOR INCREASING THE WELD WEAR BUFFER AND INCREASING THE STRENGTH OF THE END PLATE ASSEMBLIES ON U AND SU BULLDOZERS FOR D9N TRACTORS - PS0385 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA Caterpillar

PSP FOR INCREASING THE WELD WEAR BUFFER AND INCREASING THE STRENGTH OF THE END PLATE ASSEMBLIES ON U AND SU BULLDOZERS FOR D9N TRACTORS - PS0385 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA

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Caterpillar: Confidential Yellow

PSP FOR INCREASING THE WELD WEAR BUFFER AND INCREASING THE STRENGTH OF THE END PLATE ASSEMBLIES ON U AND SU BULLDOZERS FOR D9N TRACTORS - PS0385 - MAILED US AND CANADA, CACO, COFA, CFEL, 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-92
A-68
AU-61
E-44
O-61
6050   PS0385
NOTE: This Program can only be administered after a failure
occurs on customer units. However, it is recommended that dealer
inventory units be reworked on a before failure basis. The
decision whether to apply the Program is made by the dealer.
When reporting the repair, use "PS0385" as Part Number, "7755"
as Group Number, and "96" as Description Code.

Termination Date

April 30, 1990

Problem

A wear buffer is required to protect the bevel weld that connects the
bulldozer end plate to the moldboard. This buffer weld may not be as large
as desired on units shipped to the dealer prior to February 13, 1989.
Additional strength may also be required on the end plate assemblies incertain
high impact conditions. The end plate assemblies can be strengthened
by welding the bottom shoe directly to the router bit.

Affected Product

Model Identification Number
D9N  1JD1-Up
If shipped to the dealer prior to February 13, 1989.

Parts Needed

Not Applicable

Action Required

Clean the paint from the moldboard to end plate welds at both ends of the
blade. Increase the size of the buffer weld until it is 31 mm (1.2") wide or
wider and 10 mm (.4") deep at the throat. Use E7018 rod, E11018 rod, or low
hydrogen wire to make the welds. Paint the areas where the size of the weld
was increased. See Illustration 1.
Chamfer the RH and LH router bits above the shoes as shown in Illustration 2
for U Bulldozers or as shown in Illustration 3 for SU Bulldozers. Clean the
surface and remove any high spots or splatter. Attach the shoe to the router
bit with a full depth bevel weld as shown in the applicable illustration.
Use E7018 rod, E11018 rod, or low hydrogen wire to make the welds. Paint the
welded areas.

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
0-3000 - 6 0 0 0 0
0-12 mo
3001-5000 - 3 0 3 0 0
13-24 mo
NOTE: This is a 6-hour job.

Parts Disposition

Not Applicable
****** IMAGE: SEBE4039.00001.001
CAPTION: Illustration 1
****** IMAGE: SEBE4039.00001.002
CAPTION: Illustration 2
****** IMAGE: SEBE4039.00001.003
CAPTION: Illustration 3