105402-2590 ZEXEL 9 420 611 437 BOSCH GOVERNOR 9420611437 1054022590 223204260a

27Jun2018
(Revised 10Jul2018)
U-356
A-265
D-311
O-319
Parts stock action only
PRODUCT IMPROVEMENT PROGRAM FOR INSPECTING AND REPLACING INTAKE VALVES IN CERTAIN GAS AND DIESEL 3600 REMAN CYLINDER HEADS
7750 PI70709
Caterpillar’s obligations under this Service Letter are subject to, and shall not apply in contravention of, the laws, rules, regulations, directives, ordinances, orders, or statutes of the United States, or of any other applicable jurisdiction, without recourse or liability with respect to Caterpillar.
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.
This Revised Service Letter replaces the 27Jun2018 Service Letter. Changes have been made to the Action Required.
TERMINATION DATE
30Sep2018
PROBLEM
The existing remanufactured intake valves installed in certain Reman 3600 cylinder heads may have improper surface finish, which may lead to excessive bridge wear. If the affected valves cause excessive early bridge wear, the intake valves may drop.
ACTION REQUIRED
Please inspect all dealer stock of the following Reman part numbers: 10R-1835, 20R-6518, 10R-9360, 10R-1602, 10R-1496, 0R-7467, 10R-3484, 10R-4829, and 10R-3474.
Inspection procedure:
1) Check the packaging label date code on the Reman cylinder head. If the packaging label date code is dated on or after D08M06Y18 (8-June-2018), return the head to dealer stock without further action.
2) If the packaging label date code is dated earlier than 8-June-2018, remove the head from the box. Inspect the intake valves for part number (if the valve is remanufactured the part number will be hand-scribed, pin stamped, or both on the bottom of the valve head). If a hand-scribed Reman part number is present, remove this valve and replace with new. Reuse all rotocoils, keepers, springs, and seals. Replace all valves that have hand-scribed part numbers even if a pin stamp part number is also present. Refer to Image 1 for an example of both hand-scribed and pin stamped part numbers. Refer to Image 2 for a table of intake valves required for a given cylinder head part number.
If a valve without a hand-scribed Reman part number is present (or without a part number at all), return the head to the crate and ensure rust preventative is applied to any area it may have been removed from. Return the head to dealer stock.
Image1
Image2
SERVICE CLAIM ALLOWANCES
This letter allows 0.5 hours of labor for the inspection of each Reman 3600 cylinder head with a packaging date code prior to 8-June-2018. An additional 2.5 hours, 3 hours total, is allowed for every cylinder head that requires an intake valve(s) replacement.One valve will allowed for each valve that requires replacement up to two per head. See the chart in Image 2 for the applicable part numbers.
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.