PSP FOR REPLACING UNIT INJECTOR RETURN SPRINGS ON CERTAIN D11N TRACTORS; 776B TRACTORS; 777B, 785, 789 TRUCKS; 3508, 3512, 351 6 ENGINES - PS4591 - MAILED BRAZIL Caterpillar


PSP FOR REPLACING UNIT INJECTOR RETURN SPRINGS ON CERTAIN D11N TRACTORS; 776B TRACTORS; 777B, 785, 789 TRUCKS; 3508, 3512, 351 6 ENGINES - PS4591 - MAILED BRAZIL

Usage:



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Caterpillar: Confidential Yellow

PSP FOR REPLACING UNIT INJECTOR RETURN SPRINGS ON CERTAIN D11N TRACTORS; 776B TRACTORS; 777B, 785, 789 TRUCKS; 3508, 3512, 351 6 ENGINES - PS4591 - MAILED BRAZIL

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.




May 31, 1991
B-18
PRODUCT SUPPORT PROGRAM FOR REPLACING UNIT INJECTOR RETURN SPRINGS ON CERTAIN
D11N TRACTORS; 776B TRACTORS; 777B, 785, AND 789 TRUCKS; AND 3508, 3512, AND
3516 ENGINES.
1290  PS0548
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 "PS0548" as Part Number, "7755" as
Group Number, and "96" as Description Code.
NOTE: Although this Program can only be administered after failure on
the Affected Product, parts stock should be reworked as soon as
possible.

Termination Date

May 31, 1992

Problem

The return springs for Type 2 unit injectors on certain D11N Tractors; 776B
Tractors; 777B, 785, and 789 Trucks; and 3508, 3512, and 3516 Engines may
fail in some applications. Type 2 injectors are described on page 10 of the
October 2, 1989 Service Magazine.

Affected Product

Model Identification Number
D11N 74Z1-862
776B 6JC1-83
777B 4YC1-1486, 1493
785  8GB1-443, 445-449, 461, 473
789  9ZC1-493, 495-501
3508 1ZF1-560
95Y1-775
96Y1-1111
97Y1-672
23Z1-3267
68Z1-768
69Z1-547
70Z1-765
3512 3YF1-530
49Y1-587
50Y1-907
51Y1-624
24Z1-3443
65Z1-708
66Z1-412
67Z1-778
3516 4XF1-349
9KF1-54
5MJ1-24
25Z1-2015
27Z1-679
28Z1-621
29Z1-941
71Z1-294
72Z1-399
73Z1-395

Parts Needed

1 - 4P3487 Spring
1 - 6V1250 Seal (Use as required per injector)
2 - 8J8725 Seal (Use as required per injector)

Action Required

NOTE: Type 2 injectors are described on page 10 of the October 2, 1989
Service Magazine.
**** Parts Stock ****
Replace the unit injector return spring on the following fuel injectors parts
stock if the existing spring has a white or a pink paint stripe on it. The
new 4P3487 Springs have a blue paint stripe on them.
NEW REMANUFACTURED
7C4173 0R2922
7C4174 0R2923
7C4175 0R2924
7C9576 0R1759
7C9577 0R1758
7C9578 0R1757 / 0R1756
7C9579 0R2927
7C9580 0R2928
7C9581 0R2926
7E3381 0R3051
7E3382 0R2921
7E3383 0R2925
7E3384 0R3052
***** Affected Product *****
Replace the spring on the failed injector and install the new spring on all
of remaining injectors. See Special Instruction SEHS9287 "Spring Replacement
for Type 2 Fuel Injectors." The procedure and tooling described in the
Special Instruction must be used to replace the injector springs.

Service Claim Allowances

***** Parts Stock *****
Submit one claim for all Type 2 unit injectors in parts stock that are
reworked. It is a .2-hour job to replace a unit injector return spring.
***** Affected Product *****
**** 3508 Engines ****
Product Caterpillar Dealer Suggested Customer Suggested
smu Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
0-4000 100% 6.5 0 0 0 0
4001-8000 50% 3.3 0 0 50% 3.2
NOTE: This is a 6.5-hour job.
**** 3512 Engines ****
Product Caterpillar Dealer Suggested Customer Suggested
smu Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
0-4000 100% 9.5 0 0 0 0
4001-8000 50% 4.8 0 0 50% 4.7
NOTE: This is a 9.5-hour job.
**** 3516 Engines ****
Product Caterpillar Dealer Suggested Customer Suggested
smu Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
0-4000 100% 12.2 0 0 0 0
4001-8000 50% 6.1 0 0 50% 6.1
NOTE: This is a 12.2-hour job.
**** D11N Tractors, 776B Tractors, and 777B Trucks ****
Product Caterpillar Dealer Suggested Customer Suggested
smu Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
(D/N) (Cost)  (C/L) (Sell)
0-4000 100% 4 0 4 0 0
4001-8000 33 1/3% 2 0 2 50% 4
NOTE: This is an 8-hour job.
**** 785 Trucks ****
Product Caterpillar Dealer Suggested Customer Suggested
smu Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
(D/N) (Cost)  (C/L) (Sell)
0-4000 100% 5.5 0 5.5 0 0
4001-8000 33 1/3% 2.8 0 2.7 50% 5.5
NOTE: This is an 11-hour job.
**** 789 Trucks ****
Product Caterpillar Dealer Suggested Customer Suggested
smu Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
(D/N) (Cost)  (C/L) (Sell)
0-4000 100% 7.5 0 7.5 0 0
4001-8000 33 1/3% 3.8 0 3.7 50% 7.5
NOTE: This is a 15-hour job.

Parts Disposition

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

Caterpillar Information System:

PSP FOR REPLACING UNIT INJECTOR RETURN SPRINGS ON CERTAIN D11N TRACTORS; 776B TRACTORS; 777B, 785, 789 TRUCKS; 3508, 3512, 351 6 ENGINES - PS4591 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA, MARINE TEPS PSP FOR REPLACING UNIT INJECTOR RETURN SPRINGS ON CERTAIN D11N TRACTORS; 776B TRACTORS; 777B, 785, 789 TRUCKS; 3508, 3512, 351 6 ENGINES - PS4591 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA, MARINE TEPS
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