PSP FOR REPAIRING STICKING VALVES IN THE AIR COMPRESSOR ON CERTAIN 12G, 120G, 130G, AND 140G MOTOR GRADERS; 518 SKIDDERS; AND 936E AND 950E LOADERS - PS4512 - MAILED US AND CANADA, COFA, CFEL, COSA Caterpillar

PSP FOR REPAIRING STICKING VALVES IN THE AIR COMPRESSOR ON CERTAIN 12G, 120G, 130G, AND 140G MOTOR GRADERS; 518 SKIDDERS; AND 936E AND 950E LOADERS - PS4512 - MAILED US AND CANADA, COFA, CFEL, COSA

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Caterpillar: Confidential Yellow

PSP FOR REPAIRING STICKING VALVES IN THE AIR COMPRESSOR ON CERTAIN 12G, 120G, 130G, AND 140G MOTOR GRADERS; 518 SKIDDERS; AND 936E AND 950E LOADERS - PS4512 - MAILED US AND CANADA, 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-174
A-119
AU-112
E-104
O-133
1803   PS4512
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 "PS4512"
as Part Number, "7755" as Group Number, and "96" as Description
Code.
NOTE: Although this Program is to be administered as described above on
the Affected Product, parts should be removed from parts stock as
soon as possible.

Termination Date

August 31, 1991

Problem

The valves in the air compressor on certain 12G, 120G, 130G, and 140G Motor
Graders; 518 Skidders; and 936E and 950E Loaders may stick and result in a
condition of "no air at startup."

Affected Product

Model Identification Number
12G 61M11413-13706
3WC933-1379
120G  4HD630-1213
87V7884-9203
11W1218-1311
130G  74V2258-2491
12W1065-1089
140G  5MD275-886
72V9343-12874
13W740-790
518 94U1519-2273
95U1461-2734
936E  33Z1798-4468
950E  20E50-99
22Z3189-5047
65R3194-4205

Parts Needed

1 - 7E9918 Repair Kit-Major
1 - 2H9091 Connector (Motor Graders Only)
1 - 2H3940 Elbow (Motor Graders Only)
2 - 9M8406 Clip (Motor Graders Only)
1*- 8X4438 Hose (120G Only)
1*- 8X4439 Hose (12G, 130G, and 140G Only)
* On motor graders equipped with alcohol injectors, dealers
will need to fabricate the discharge line due to location
variations.

Action Required

***** Parts Stock *****
Remove all 7C0569 Repair Kits removed from parts stock.
***** Affected Product *****
Remove the cylinder head from the air compressor and replace the valves as
described in the instructions enclosed in the repair kit.
On motor graders only, replace the discharge line and the fittings that the
ends of the line connect to.
NOTE: On motor graders equipped with alcohol injectors, dealers will
need to fabricate the discharge line due to location variations.

Service Claim Allowances

***** Parts Stock *****
Submit one claim for all 7C0569 Repair Kits removed from parts stock.
***** Affected Product *****
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
***** 12G, 120G, 130G, and 140G Motor Graders *****
0-3000 100% 2 0 2 0 0
0-24 mo
3001-5000 33 1/3% 1 0 1 50% 2
25-36 mo
***** 518 Skidders *****
***** 936E and 950E Loaders *****
0-3000 100% 1.5 0 1.5 0 0
0-24 mo
3001-5000 33 1/3% .8 0 .7 50% 1.5
25-36 mo
NOTE: This is a 3-hour job on Skidders and Loaders; and a 4-hour job on
Motor Graders.

Parts Disposition

Any parts removed (with the exception of cores used for Caterpillar
Remanufactured parts) can be rendered useless and scrapped immediately upon
completion of the repair.