HOSE ASSEM. 67.32 in. (17.10 dm) 8K4076 - Caterpillar

June 5, 2001
U-131
A-88
beforeor
after failure PRODUCT SUPPORT PROGRAMFOR ADJUSTING THE FUEL CELL FLOAT TANK SWITCH IN CERTAIN 3412 ENGINES
7422 PS40597
This Program can be administered eitherbefore or after failure. In either case the decision whether to apply theProgram is made by the dealer. When reporting the repair, use "PS40597"as the Part number and "7755" as the Group Number. If administered beforefailure, use "56" as the Warranty Claim Description Code and use "T" asthe SIMS Description Code. If administered after failure, use "96" as theWarranty Claim Description Code and use "Z" as the SIMS Description 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.TERMINATION DATE
June 30, 2003PROBLEM
The fuel cell float tank switch is normally inthe open state and the correct position is normally closed.AFFECTED PRODUCT
Model Identification Number3412 9EP174, 176, 179, 260, 328, 335, 361,374, 381-382, 387-388, 390, 392-393, 401-402, 405, 410, 417-418, 423, 430,440, 445-446, 450-451, 455-457, 460, 465, 469, 473, 478-479, 486-489, 491-492,495-496, 499, 502-503, 506-507, 512, 517, 522-523, 527-529, 532, 536, 538,540, 542-544, 546, 551-553, 555-561, 563-566, 568, 5843412C BCW168-169, 172, 174-175, 177, 180, 182,186, 189, 200-201, 203PARTS NEEDED
No parts needed.ACTION REQUIRED
Refer to attached Rework Procedure.SERVICE CLAIM ALLOWANCES
Product smu/age whichever comes first Caterpillar Dealer Suggested Customer Suggested
Parts Labor Hrs Parts Labor Hrs Parts Labor Hrs
0-36 MO. 0 3.0 0 0 0 0
This is a 3.0? hour job.PARTS DISPOSITION
Handle the parts in accordance with your WarrantyBulletin on warranty parts handling.
Attach. (1-Rework Procedure)Rework Procedure
Only qualified electrical personnelshould service this equipment.
Turn off all power, prevent the engine from startingand lock out the equipment before working on or inside this equipment.
NOTE: Always use a properly ratedvoltage-sensing device to confirm that the power is off.NOTE: Post all required warnings andtags.NOTE: Inform all necessary personnel.Exercise required code and site-specific procedures in order to avoid injury.NOTE: Discharge any capacitance beforetouching electrical leads.NOTE: Replace all devices, doors, andcovers before turning power on to this equipment.
Mark the locations of the upper and lower stopsfor the top float.
Continue to move the float upwards until you nolonger have continuity, then set the upper stop .187 inches above the topof the float.
Slide the float back down until continuity isfirst reached and set bottom .187 inches below this point. If this proceduredoes not work, then the float will have to be flipped over. Use the followingprocedure to do that:
Mark all stops on the tube.
Starting at the bottom remove all the stops exceptfor the very top stop and remove all floats.
Reinstall upper float with arrow pointing down.
Reinstall the lower stop for the upper float byplacing the stop on the mark made in step a.
Reinstall the upper stop for the second highestfloat by placing the stop on the mark made in step a.
Install float with arrow pointing down.
Install the lower stop for the second highestfloat by placing the stop on the mark made in step a.
Repeat steps e through g for the remaining twofloats (all arrows should be pointing down for all floats).
Check continuity for all floats (you should seecontinuity for all