0336217 JOHNSON NOZZLE, Exhaust relief

November 4, 2004
(Revised January 2005)
U-311
A-219
D-238
O-272
Priority Parts stock action needed PRODUCT IMPROVEMENT PROGRAM FOR SAMPLINGTHE ENGINE OIL AND IF NECESSARY REPLACING THE IDLER GEAR ASSEMBLY ON 3054CENGINES INSTALLED IN CERTAIN CB-434D, CB-534D, CP-433E, CP-323C, CS-323C,CS-423E, CS-433E, CS-533E COMPACTORS
1234,5073, 1387, 1151, 1162, 1000-008 PI30742
This Program must be administered assoon as possible. When reporting the repair, use "PI30742" as the Partnumber and "7751" as the Group Number, "56" as the Warranty Claim DescriptionCode and "T" as the SIMS Description Code. Exception: If the repair isdone after failure, use "PI30742" as the Part Number, "7751" as the GroupNumber, "96" as the Warranty Claim Description Code, and "Z" as the SIMSDescription Code. The information supplied in this serviceletter may not be valid after the termination date of this program. Donot perform the work outlined in this Service Letter after the terminationdate without first contacting your Caterpillar product analyst. This Revised Service Letter replacesthe November 4, 2004 Service Letter. Changes have been made to the partsneeded. Make every effort to administer thisprogram in a timely manner, but with the least incursion into the customers?operation. Taking oil samples at the normal maintenance interval, especiallywhere Customer Support Agreements are in existence, or where customersalready use Scheduled Oil Sampling, is advised to keep program costs toa minimum. This program also affords an opportunity to promote CSAs andSOS with customers not currently enrolled.
COMPLETION DATE
TERMINATION DATE
May 31, 2005 November 30, 2005PROBLEM
There have been reports of premature wear on theidler gear bushing assembly and idler hub.Root cause has been identified asa machining process change made by the gear supplier, which had an undesirableeffect on the surface finish of some idler gear bushings. Copper contentin the oil has been identified as an accurate method for predicting whetherthe engine will be affected by the accelerated wear condition.Rework of the idler gear assembly is recommendedif the copper content in the oil exceeds the threshold levels detailedbelow(expressed as Cu). Oil samples should be taken duringroutine service intervals (unless an oil sampling program is already inexistence with predetermined intervals which are more frequent than thenormal service intervals).
While elevated copper levels from SOSsampling can effectively identify accelerated idler gear bearing wear,occasional hard cold starting difficulties may also indicate prematureidler gear bearing wear.AFFECTED PRODUCT
The affected serial number list shownbelow excludes machines that were repaired under an earlier field probeto determine the extent of this problem. Other machines may already havebeen repaired with parts announced in TIBU4161. While these machines maystill be included in the list below, there is no need to replace the idlergear assembly again. If your machine is in the affected productbelow and is a new machine being currently held in Dealer stock or inventory,apply this PI and re-work the Idler gear As. (There is no requirement tosample the oil).
Model Identification Number
CB-434D CNH323, 328-331,335-344, 347-351, 354-357
CB-534D EAA128, 131-141,143-148, 150-164, 166-216, 220FGH180, 184, 188-197, 199-209, 212-213,215-225, 227-235, 238-240, 242, 244-248, 250-264, 268-269, 278, 284
CP-323C EAS220-231
CP-433E ASN101-113,115-126, 128, 130-132, 134-136, 139
CS-323C DAR114-118
CS-423E AST301-303,305-320BWG100-108
CS-433E ASR200-227,229-230, 232, 235-239, 243-245, 247BTT200-203, 205, 209-211, 221-222,224, 273
CS-533E ASL123-125,127-132, 134, 139-140, 142, 144, 149, 151, 188, 190, 192-194DAK131, 134-155, 157, 159-163, 167,176PARTS NEEDED
Qty
Part Number Description
1 OIL SAMPLINGKIT
1 2258019 GASKET-PUMP
1 2268766 GASKET-COVER
1 2514336 GEAR AS-IDLE
1 2546029 HUB-IDLER GEAR
1 2551209 PLATE-RETAIN
3 6I-0650 BOLTACTION REQUIRED
***** Parts Stock *****Remove all 232-3668 parts from parts stock.***** Affected Product *****An oil sample must be taken from all enginesin the affected product range. The oil sample report must be attached toall claims that include an idler gear change. Make every effort to administerthis program in a timely manner, but with the least incursion into thecustomers? operation. Taking oil samples at the normal maintenance interval,especially where Customer Support Agreements are in existence, or wherecustomers already use Scheduled Oil Sampling, is advised to keep programcosts to a minimum.