PSP FOR 231D HYDRAULIC NOISE AND AERATION - COSA LETTER NO. 1 - MAILED COSA
NOTE:   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 AVSpare product analyst.
January 11, 1993 COSA LETTER No. 1 PRODUCT SUPPORT PROGRAM FOR 231D HYDRAULIC NOISE AND AERATION 5458 PS4891 NOTE: This Program can be administered either before or after a failure or complaint. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4891" as the Part Number, and "7755" as the Group Number. If administered before failure, use "56", and after failure "96" as the Warranty Claim Description Code.
January 31, 1994
The location of the hydraulic oil return baffle tube inside the 231D hydraulic tank causes oil aeration when the machine is used in slope operation. Oil aeration results in noise from the hydraulic pumps and cause air to get trapped in the pilot controls and implement cylinders. The 6E2849 Valve in the oilcooler by-pass valve group is unstable and vibrates causing irritating noise at certain engine speeds. The noise level will increase when the hydraulic oil is aerated. HEBE1409
Model Identification Number *** Group 1 *** 231D 5WJ1-72, 76-82, 86-108, 112-116, 119-197, 199-243, 245, 247-260, 262, 266-284, 292-304, 315 *** Group 2 *** 231D 5WJ73-75, 83-85, 109-111, 117-118, 198, 244, 246, 261, 263-265, 285-291, 305-314, 316-330
1 - 105-3663 Tube As-Baffle 1 - 105-3784 Valve
*** Group 1 *** Drain approx. 100 liters of oil from the hydraulic tank into a clean container. The oil should be re-used. If the rework can be scheduled to coincide with the regular oil change it is not necessary to salvage the oil. Remove the 8J3803 Coupling and 8J3702 Head assembly (tank cover). Replace the 9J3537 Tube As-Baffle inside the tank by the new 105-3663 Tube As-Baffle. Install the 8J3702 Head assembly and 8J3803 Coupling. Remove the 6E0605 Plug from the 6E2842 Valve group - oilcooler by-pass valve. Replace the former 6E2849 Valve by the new 105-3784 Valve. Install the 6E0605 Plug. Fill the hydraulic tank to the proper level. Start the engine and check for leaks. *** Group 2 *** Replace the 9J3537 Tube As-Baffle as described. The 105-3784 Valve has been installed at the factory on the machines in this serial number range.
Service Claim Allowances
Product AVSpare Dealer Suggested Customer Suggested smu/age Parts Labor Hrs Parts Labor Hrs Parts Labor Hrs whichever (D/N) (Cost) (C/L) (Sell) comes first *** Group 1 *** 0-2000 100 % 3.0 0 0 0 0 0-24 mo. 2001-3000 33 1/3% 1.5 0 0 50 % 1.5 25-36 mo. *** Group 2 *** 0-2000 100 % 2.0 0 0 0 0 0-24 mo. 2001-3000 33 1/3% 1.0 0 0 50 % 1 25-36 mo.
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.