PSP TO REPAIR HYDRAULIC TANK ON B-SERIES EXCAVATORS - COSA LETTER NO. 9 - PS0583

PSP TO REPAIR HYDRAULIC TANK ON B-SERIES EXCAVATORS - COSA LETTER NO. 9 - PS0583 - MAILED COSA [HEBE1397]

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PSP TO REPAIR HYDRAULIC TANK ON B-SERIES EXCAVATORS - COSA LETTER NO. 9 - PS0583 - 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.


December 16, 1991
COSA LETTER NO. 9
PRODUCT SUPPORT PROGRAM TO REPAIR HYDRAULIC TANK ON B SERIES
EXCAVATORS
5056   PS0583
NOTE: This program can be administered only after a
failure. The decision whether to apply the program
is made by the dealer. When reporting the repair,
use "PS0583" as Part Number causing failure,
"7755" as Group Number and "96" as Description
Code.

Termination Date

December 31, 1992

Problem

There have been several instances of cracking at the weld between
the top plate and the side plates of the hydraulic tank. This
problem is the result of poor weld penetration and insufficient
weld material used during fabrication of the tank.

Affected Product

Model Identification Number
214 B 4CF00195 to 466
214 B FT 9MF00092 to 370
213 B 1EJ00157 to 320
NOTE: Starting Serial Numbers are approximate as we have been
unable to define exact unit when fabrication procedure
was changed.

Parts Needed

No parts are required for this rework except for welding rods.
HEBE1397

Action Required

Whenever cracks are detected between the top and the side plates
of the hydraulic tank, disassembly of the tank is necessary to
add a welding cord on the inside of the top plate. The complete
repair procedure outlines the steps involved.
NOTE: W A R N I N G
Applying heat to a tank which has held flammable
liquids, even when "empty", can result in the residual
flammable liquid or vapor igniting with explosive
force. This can result in injury or death. DO NOT weld
or flame cut on any tank that has held flammable liquid
without taking the proper precautions.
Please refer to Service Magazine dated July 2, 1990 for
proper instructions BEFORE performing the repair.

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
0-2,000 0 10 0 0 0 0
0-24 mo
NOTE: This is a 10-hours job.

Parts Disposition

Handle the parts in accordance with your Warranty Bulletin on
warranty parts handling.

Rework Procedure

WARNING: BEFORE STARTING THE REPAIR, PLEASE REFER TO THE
INSTRUCTIONS OUTLINED IN THE SERVICE MAGAZINE DATED
JULY 2, 1990 FOR PROPER WELDING PROCEDURES ON HYDRAULIC
TANKS.
1 - Remove the hydraulic tank following instructions in the
Service Manual.
2 - Remove the bottom plate of the tank by grinding the weld
cords.
3 - Add welding from inside and between the top and the side
plates. Please refer to the attached drawing for weld
location and dimensions. Use E7018 electrodes (AVSpare
Part Number 1U5231 to 1U5236).
4 - Allow the weld cord to cool down.
5 - Grind cracked welds on the outside until you have a clean
surface.
6 - Weld on the outside using the same grade electrodes
mentioned at step 3.
7 - Grind the outside weld to give a clean appearance.
8 - Carefully clean the inside of the tank to remove any
residual hydraulic oil or weld deposits.
9 - Weld back the bottom plate by using the same electrodes
mentioned at step 3 and 6. Please refer to the attached
drawing for weld size.
10 - Paint the hydraulic tank.
11 - Install the tank.