TURBOCHARGER GP 2W7470 - Caterpillar

28Jun2013
(Revised 28Jun2013)
U-278
A-186
D-237
O-237
Parts stock action only
PRODUCT IMPROVEMENT PROGRAM FOR REPLACING PARTS STOCK OF CERTAIN LINE RELIEF VALVES FOR 980H WHEEL LOADERS
7750 PI70487
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 28Jun2013 (Revised 28June2013) Service Letter. Changes have been made to the Action Required, to include a graphic.
TERMINATION DATE
30Sep2013
PROBLEM
The existing 4T-4932 and 4T-4933 Line Relief Valves can fail on 980H Wheel Loaders due to incorrect machining processes on some valves.
ACTION REQUIRED
Inspect all 4T-4932 and 4T-4933 Line Relief Valves that are in dealer parts stock.
- If the 4T-4932 and 4T-4933 Line Relief Valves have a "CN" stamp following the date code, the parts are good, and do not need to be replaced, and should be returned to dealer parts stock.
- If the 4T-4932 and 4T-4933 Line Relief Valves do not have a "CN" stamp following the date code, the valves need to be removed from dealer parts stock.
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SERVICE CLAIM ALLOWANCES
Submit one claim for all parts removed from dealer parts stock.
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.