ROTATING GP-PUMP 1425519 - Caterpillar

Problem
The fuel injector may not seal properly in the injector bore of the cylinder head(s) of certain 3508, 3512, and 3516 Engines. The injector bore needs to be machined on these engines.
Affected Product
Model & Identification Number
3508 (1ZF666-668, 23Z4193-4273,23Z4277, 23Z4279, 23Z4283-4290,23Z4292,23Z4293,23Z4295,23Z4300,23Z4303,23Z4304;95Y822-830;96Y1253-1270;97Y676;69Z592-594,69Z597;70Z807,70Z808)
3512 ( 24Z4352-4411,24Z4413-4420, 24Z4424-4442, 24Z4444-4446,24Z4448,24Z4451-4453, 24Z4456, 24Z4458, 24Z4459,24Z4462,24Z4463;50Y1020-1043;51Y670-672;65Z742-752 ; 66Z486-489;67Z928-959;3YF665-678;49Y664-666)
3516 (25Z2652-2663, 25Z2665-2712, 25Z2715-2722, 25Z2724-2730; 29Z1001-1005; 4XF419-424; 72Z438-440; 73Z545-548)
Parts Needed
Dealers will need to order parts for this Program.
1 - 6V1250 Seal2 - 8J8725 Seal Use as required. Quantities listed are per cylinder.
Action Required
Call Dave Bradshaw (ph. (317) 448-5590) to obtain a tool kit containing the tools necessary to rework the cylinder heads. After obtaining the tool kit, perform the rework according to the attached rework procedure.
Owner Notification
U.S. and Canadian owners will receive the attached Owner Notification.
Service Claim Allowances
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Make Every Effort To Complete This Program As Soon As Possible.
Attach.
(1-Owner Notification)(2-Rework Procedure)Copy Of Owner Notification For U.S. And Canadian Owners
Rework Procedure
Do not remove the cylinder heads from the engine to complete this rework.If the cylinder heads are stamped with "B" or "R".rework is not required. The "B" or "R" designates that the rework was already completed by the Lafayette Facility. The stamping is located on the cylinder head face.
A procedure and tool kit have been developed to rework the cylinder heads. Please contact Dave Bradshaw of 3500 Customer Service at telephone number (317) 448-5590 for information on how to obtain a tool kit. A list of the components in the tool kit follow.
Use the appropriate service manual disassembly and assembly module as a guide for removing and installing components in this procedure.
1. Identify all the components to be removed by cylinder number so they can be installed in the correct locations.2. Remove the valve cover.3. Remove the rocker arm assembly.4. Remove the fuel line between the fuel manifold and the cylinder head. Remove the unit injector.5. Check for carbon in the cylinder head injector bore, and on the injector's nozzle seat and bottom O-ring area. (See Illustration 1 for the areas to be cleaned.)6. If there is no carbon in the injector bore or on the injector, go to Step 9.7. If there is carbon in the cylinder head injector bore, clean the carbon from the nozzle seat area and "B" Bore. (See Illustration 1 for the areas to be cleaned.)A) Clean bore with fuel oil, bottle brush (Item 12 on Tool List), and Scotchbrite (Item 7 on Tool List). Use Scotchbrite on "B" bore only to assure good o-ring seal.B) Flush fuel holes (See Illustration 2) and injector bore with fuel oil.C) Remove excess fuel from the cylinder with differential suction tool (Item 10 on tool list).8. Clean carbon from the unit injector's nozzle seat and bottom O-ring area.A) Cover the injector fuel ports to keep out debris.B) Remove the bottom o-ring from the injector. (This is a 6V1250 O-Ring.)C) Clean carbon from the o-ring groove with fuel oil and Scotchbrite.D) Use fuel oil to clean debris from