SERVICE LETTER SUPPLEMENT FOR DECEMBER 24, 1990 SL - PI3500 - PRIORITY - THE BOLTS THAT HOLD THE DIFFERENTIAL PINION IN PLA CE MAY WORK LOOSE ON CERTAIN 623E WHEEL TRACTORS - MAILED US AND CANADA, COSA, LIMITED COFA Caterpillar


SERVICE LETTER SUPPLEMENT FOR DECEMBER 24, 1990 SL - PI3500 - PRIORITY - THE BOLTS THAT HOLD THE DIFFERENTIAL PINION IN PLA CE MAY WORK LOOSE ON CERTAIN 623E WHEEL TRACTORS - MAILED US AND CANADA, COSA, LIMITED COFA

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Caterpillar: Confidential Yellow

SERVICE LETTER SUPPLEMENT FOR DECEMBER 24, 1990 SL - PI3500 - PRIORITY - THE BOLTS THAT HOLD THE DIFFERENTIAL PINION IN PLA CE MAY WORK LOOSE ON CERTAIN 623E WHEEL TRACTORS - MAILED US AND CANADA, COSA, LIMITED COFA

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.




April 4, 1991
U-63
AU-40.1
O-49
SERVICE LETTER SUPPLEMENT
Some information needs to be changed in the Service Letter which follows:
December 24, 1990 - PI3500; The Bolts That Hold The Differential Pinion In
Place May Work Loose On Certain 623E Wheel Tractors
Under the heading Service Claim Allowances, change the information to read as
follows.
Caterpillar Dealer Suggested Customer Suggested
Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
(D/N) (Sell)   (C/L) (Sell)
100% 18 0 0  0 0
NOTE: This is a 18-hour job
NOTE: If a claim for 9 hours was submitted prior to this supplement, an
additional 9 hours can be claimed by a supplemental claim.

Caterpillar Information System:

PSP FOR REPLACEMENT OF THE EMS OIL PRESSURE SWITCH AND THE HOUR METER OIL PRESSURE SWITCH ON CERTAIN D8N, D9N, D10N, AND D11 N TRACTORS - PS4586 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA PSP FOR REPLACEMENT OF THE EMS OIL PRESSURE SWITCH AND THE HOUR METER OIL PRESSURE SWITCH ON CERTAIN D8N, D9N, D10N, AND D11 N TRACTORS - PS4586 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA
PSP FOR FAILED ONE-WAY CLUTCH COMPONENTS ON 988B LOADERS EQUIPPED WITH 2Z0989, 2Z8670, 2Z8786, 2Z8858, 2Z8859 OR 2Z8860 LOC K-UP CONVERTER ARRANGEMENTS - PS0517 - MAILED US AND CANADA, COSA, LIMITED COFA - REVISED 01/92 PSP FOR FAILED ONE-WAY CLUTCH COMPONENTS ON 988B LOADERS EQUIPPED WITH 2Z0989, 2Z8670, 2Z8786, 2Z8858, 2Z8859 OR 2Z8860 LOC K-UP CONVERTER ARRANGEMENTS - PS0517 - MAILED US AND CANADA, COSA, LIMITED COFA - REVISED 01/92
PRIORITY - THE CASE AND FRAME ASSEMBLY NEEDS TO BE INSPECTED FOR TOOL MARKS FROM MACHINING OPERATIONS ON CERTAIN D5B TRA CTORS - PI3520 - MAILED US AND CANADA, BRAZIL - PLEASE NOTE THAT A LIMITED MAILING WAS MADE TO COSA FOR A SUPPLEMENT TO THIS S L PRIORITY - THE CASE AND FRAME ASSEMBLY NEEDS TO BE INSPECTED FOR TOOL MARKS FROM MACHINING OPERATIONS ON CERTAIN D5B TRA CTORS - PI3520 - MAILED US AND CANADA, BRAZIL - PLEASE NOTE THAT A LIMITED MAILING WAS MADE TO COSA FOR A SUPPLEMENT TO THIS S L
PRIORITY - GROUND WIRES ON CERTAIN D6H, D7H, AND D8N TRACTORS EQUIPPED WITH ROOF MOUNTED AIR CONDITIONER CONDENSERS NEED TO BE CHECKED FOR CORRECT GROUND WIRE INSTALLATION - PI3521 - MAILED US AND CANADA, LIMITED CACO PRIORITY - GROUND WIRES ON CERTAIN D6H, D7H, AND D8N TRACTORS EQUIPPED WITH ROOF MOUNTED AIR CONDITIONER CONDENSERS NEED TO BE CHECKED FOR CORRECT GROUND WIRE INSTALLATION - PI3521 - MAILED US AND CANADA, LIMITED CACO
PRIORITY - REINFORCING PLATES NEED TO BE INSTALLED ON THE DRAFT TUBES OF CERTAIN 631E AND 637E SCRAPERS - PI3525 - MAI LED US AND CANADA, CACO, COFA, BRAZIL, CFEL, COSA PRIORITY - REINFORCING PLATES NEED TO BE INSTALLED ON THE DRAFT TUBES OF CERTAIN 631E AND 637E SCRAPERS - PI3525 - MAI LED US AND CANADA, CACO, COFA, BRAZIL, CFEL, COSA
PSP FOR EXCESSIVE AIR SIDE PLUGGING OF FOLDED CORE RADIATORS IN 508 SKIDDERS - PS0488 - MAILED US AND CANADA, COSA, LIMITED COF A PSP FOR EXCESSIVE AIR SIDE PLUGGING OF FOLDED CORE RADIATORS IN 508 SKIDDERS - PS0488 - MAILED US AND CANADA, COSA, LIMITED COF A
PARTS STOCK ACTION ONLY - INSTRUCTION PLATES WITH PLASTIC COATING NEED TO BE REMOVED FROM PARTS STOCK - PI7255 - MAILED US AND CANADA, CACO, COFA, BRAZIL, CFEL, COSA PARTS STOCK ACTION ONLY - INSTRUCTION PLATES WITH PLASTIC COATING NEED TO BE REMOVED FROM PARTS STOCK - PI7255 - MAILED US AND CANADA, CACO, COFA, BRAZIL, CFEL, COSA
PSP FOR CORE CREDIT WHEN USING REMANUFACTURED 3161 GOVERNORS TO UPDATE D11N TRACTORS; 777B, 785, AND 789 TRUCKS AND 3508, 351 2, AND 3516 SPARE ENGINES - MAILED US AND CANADA PSP FOR CORE CREDIT WHEN USING REMANUFACTURED 3161 GOVERNORS TO UPDATE D11N TRACTORS; 777B, 785, AND 789 TRUCKS AND 3508, 351 2, AND 3516 SPARE ENGINES - MAILED US AND CANADA
SERVICE LETTER EXTENSION FOR FEBRUARY 25, 1990 SL - PS0434 - PSP FOR INSTALLING NEW PISTON RINGS AND CYLINDER LINERS TO RED UCE OIL CONSUMPTION ON CERTAIN CHALLENGER 65 TRACTORS; 235C E240, EL240, E300 AND EL300 EXCAVATORS; AND 963 AND 973 LOADER S - SERVICE LETTER EXTENSION FOR FEBRUARY 25, 1990 SL - PS0434 - PSP FOR INSTALLING NEW PISTON RINGS AND CYLINDER LINERS TO RED UCE OIL CONSUMPTION ON CERTAIN CHALLENGER 65 TRACTORS; 235C E240, EL240, E300 AND EL300 EXCAVATORS; AND 963 AND 973 LOADER S -
PSP FOR INSTALLING NEW FUEL LINES AND FUEL LINE BRACKETS ON CERTAIN 621S, 627E AND 637E SCRAPERS - PS4463 - MAILED US AND CAN ADA, CACO, COFA, CFEL PSP FOR INSTALLING NEW FUEL LINES AND FUEL LINE BRACKETS ON CERTAIN 621S, 627E AND 637E SCRAPERS - PS4463 - MAILED US AND CAN ADA, CACO, COFA, CFEL
Product Support Program For Repairing The Transmission On Certain 930R Wheel Loaders. Product Support Program For Repairing The Transmission On Certain 930R Wheel Loaders.
PSP FOR CERTAIN D6H AND D6H LGP TRACTORS EQUALIZER BAR CENTER PIN BEARINGS - PS4584 - MAILED US AND CANADA, CACO, COFS, CFEL, CO SA PSP FOR CERTAIN D6H AND D6H LGP TRACTORS EQUALIZER BAR CENTER PIN BEARINGS - PS4584 - MAILED US AND CANADA, CACO, COFS, CFEL, CO SA
SERVICE LETTER SUPPLEMENT FOR FEBRUARY 27, 1991 SL - PS4429 - PSP FOR INSTALLING AN AUTOMATIC ETHER INJECTION SYSTEM (AEIS) ON CERTAIN D11N TRACTORS - MAILED US AND CANADA, COFA, COSA, LIMITED CACO, LIMITED CFEL SERVICE LETTER SUPPLEMENT FOR FEBRUARY 27, 1991 SL - PS4429 - PSP FOR INSTALLING AN AUTOMATIC ETHER INJECTION SYSTEM (AEIS) ON CERTAIN D11N TRACTORS - MAILED US AND CANADA, COFA, COSA, LIMITED CACO, LIMITED CFEL
PRIORITY - NEW SUN GEAR NEEDS TO BE INSTALLED IN THE TRANSMISSIONS OF CERTAIN 518 AND 528 SKIDDERS - PI3542 - MAI LED US AND CANADA, COSA, LIMITED COFA PRIORITY - NEW SUN GEAR NEEDS TO BE INSTALLED IN THE TRANSMISSIONS OF CERTAIN 518 AND 528 SKIDDERS - PI3542 - MAI LED US AND CANADA, COSA, LIMITED COFA
PARTS STOCK ACTION ONLY - 2W6395 IDLER GEAR FOR USE IN 992C REAR GEAR TRAIN NEEDS TO BE REMOVED FROM PARTS STOCK - PI7263 - MA ILED US AND CANADA, CACO, COFA, BRAZIL, CFEL, COSA PARTS STOCK ACTION ONLY - 2W6395 IDLER GEAR FOR USE IN 992C REAR GEAR TRAIN NEEDS TO BE REMOVED FROM PARTS STOCK - PI7263 - MA ILED US AND CANADA, CACO, COFA, BRAZIL, CFEL, COSA
PSP FOR INSTALLING NEW VALVE LOCKS ON CERTAIN D8L TRACTORS AND 631E SCRAPERS - PS4614 - MAILED US AND CANADA, COSA, LIMITED CFE L PSP FOR INSTALLING NEW VALVE LOCKS ON CERTAIN D8L TRACTORS AND 631E SCRAPERS - PS4614 - MAILED US AND CANADA, COSA, LIMITED CFE L
PRIORITY - PARTS STOCK ACTION NEEDED - THE ELECTRONIC CONTROL GROUP FOR THE CMS PANEL NEEDS TO BE REPLACED - THE DIAGNOSTIC CON NECTOR WIRING ON THE STARTER NEEDS TO BE CHANGED ON CERTAIN 966F WHEEL LOADERS - PI3522 - MAILED US AND CANADA, CACO, CFEL PRIORITY - PARTS STOCK ACTION NEEDED - THE ELECTRONIC CONTROL GROUP FOR THE CMS PANEL NEEDS TO BE REPLACED - THE DIAGNOSTIC CON NECTOR WIRING ON THE STARTER NEEDS TO BE CHANGED ON CERTAIN 966F WHEEL LOADERS - PI3522 - MAILED US AND CANADA, CACO, CFEL
SERVICE LETTER EXTENSION FOR APRIL 9, 1990 SL - PSP FOR TURBOCHARGER TURBINE WHEEL ON D11N TRACTORS; 776B TRACTORS; 777 B TRUCKS; AND 3508 ENGINES (SPARE) - PS4394 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA SERVICE LETTER EXTENSION FOR APRIL 9, 1990 SL - PSP FOR TURBOCHARGER TURBINE WHEEL ON D11N TRACTORS; 776B TRACTORS; 777 B TRUCKS; AND 3508 ENGINES (SPARE) - PS4394 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA
PRIORITY - PARTS STOCK ACTION NEEDED - NEW SOLENOID TO CONTROL GOVERNOR HORSEPOWER SETTING NEEDS TO BE INSTALLED ON CERTAIN 140 G VHP MOTOR GRADERS, 518 SKIDDERS, AND 518 GRAPPLE SKIDDERS - PI3538 - MAILED US AND CANADA, CACO, COSA, LIMITED COFA - RE PRIORITY - PARTS STOCK ACTION NEEDED - NEW SOLENOID TO CONTROL GOVERNOR HORSEPOWER SETTING NEEDS TO BE INSTALLED ON CERTAIN 140 G VHP MOTOR GRADERS, 518 SKIDDERS, AND 518 GRAPPLE SKIDDERS - PI3538 - MAILED US AND CANADA, CACO, COSA, LIMITED COFA - RE
PSP FOR REPLACING THE TRACK IDLER SHAFT AND BEARINGS IN THE TRACK IDLERS OF CERTAIN D3C TRACTORS, D4C TRACTORS, 931C LOA DERS, AND 935C LOADERS - PS4554 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA PSP FOR REPLACING THE TRACK IDLER SHAFT AND BEARINGS IN THE TRACK IDLERS OF CERTAIN D3C TRACTORS, D4C TRACTORS, 931C LOA DERS, AND 935C LOADERS - PS4554 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA
PARTS STOCK ACTION ONLY - 9W4135 TRANSFER GEARS IN PARTS STOCK NEED TO BE INSPECTED - PI7265 - MAILED US AND CANADA, CACO, COF A, BRAZIL, CFEL, COSA PARTS STOCK ACTION ONLY - 9W4135 TRANSFER GEARS IN PARTS STOCK NEED TO BE INSPECTED - PI7265 - MAILED US AND CANADA, CACO, COF A, BRAZIL, CFEL, COSA
PSP FOR INSTALLING A NEW WINCH CONTROL VALVE TO IMPROVE INPUT CLUTCH OPERATION ON CERTAIN D5H CUSTOM SKIDDERS EQUIPPED WITH AN 8Z7530 GRAPPLE MODIFICATION - PS0546 - MAILED US AND CANADA PSP FOR INSTALLING A NEW WINCH CONTROL VALVE TO IMPROVE INPUT CLUTCH OPERATION ON CERTAIN D5H CUSTOM SKIDDERS EQUIPPED WITH AN 8Z7530 GRAPPLE MODIFICATION - PS0546 - MAILED US AND CANADA
Product Support Program For Repairing Rear Track Roller Frames With Cracked Tube To Bogie Plate Welds On Certain D10N Tractors Product Support Program For Repairing Rear Track Roller Frames With Cracked Tube To Bogie Plate Welds On Certain D10N Tractors
Service Letter Supplement Service Letter Supplement
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