BUSHING (master) 5M2037 - Caterpillar

Parts stock action only
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND POSSIBLY REMOVING CERTAIN PISTON SKIRTS FROM DEALER PARTS STOCK AND INSPECTING AND POSSIBLY REWORKING CERTAIN 3456 AND C-16 CYLINDER PACKS, SHORT BLOCKS, AND LONG BLOCKS IN DEALER PARTS STOCK
1225 7750 1239 PI70504
When submitting claim for Parts Stock Action, Use the appropriate 99Z as the s/n, the appropriate Service Letter Program Number as the Part number in the Part Causing Failure field, "7751" as the Group Number, "56" as the Description Code.
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.
TERMINATION DATE
31May2014
PROBLEM
Piston skirts with U182 and U183 dates codes can lead to piston seizure on certain 3456 or C-16 engines. If the existing piston skirts with these dates codes are installed it can/will lead to a piston skirt seizure.
ACTION REQUIRED
Remove all 284-6039 Piston Skirts with a U182 or U183 date code on the bottom of the piston skirt from dealer stock. Refer to Image 1.
For 0R9393 and 0R8918 Cylinder Packs with date codes between D22M07Y13P68HL and D20M12Y13P98HL please remove from the packaging and inspect for U182 and U183 date codes on the piston skirt. Replace any found with these date codes with a new 284-6039 Piston Skirt of another date code.
For short blocks, refer to Image 2 for the affected short block serial numbers of part numbers 0R4767, 10R1506, and 10R8606. Inspect these serial numbers to determine if they contain piston skirts with the affected U182 and U183 dates codes. with the affected U182 and U183 dates codes. Document the serial number of each short block reworked.
For long blocks, refer to Image 2 for the affected long block block serial numbers of part numbers 10R7271 and 10R7272. Inspect these serial numbers to determine if they contain piston skirts with the affected U182 and U183 dates codes. If any are found, replace each piston skirt with an affected date code with new 284-6039 Piston Skirt of another date code. Document the serial number of each long block reworked.
Image1
Image2
SERVICE CLAIM ALLOWANCES
Submit one claim for all parts removed or reworked in dealer parts stock.For 0R9393, and 0R8918 Cylinder Packs, 0.25 hour is allowed each cylinder pack inspected. An additional 0.25 hour is allowed for each cylinder pack where the piston skirt is replaced. One 284-6039 Piston Skirt is allowed for each cylinder pack where the piston skirt is replaced.For 0R4767, 10R1506, and 10R8606 Short Blocks, 1 hour is allowed for each short block inspected. An additional 2 hours is allowed for each short block where the piston