CYLINDER GP-MULTIPURPOSE BUKT 1851839 - Caterpillar

Caterpillar: Confidential Yellow
OPERATIONAL:INSTALL LOAD SPRING ON FUEL LIMITER IN WOODWARD UG8L GOVERNOR - 3508 3512 PI7034 - WORLDWIDE
  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.
INSTALL LOAD SPRING ON FUEL LIMITER IN WOODWARD UG8L GOVERNORS, 3508, 3512 Engines, 1257, 1289, PI7034 U-81 A-74 AU-68 B-32 C-75 E-66 O-63 optional Problem The engines listed are equipped with 1W514 or 1W516 Governor Groups. These are the Woodward UG8L Governors with the fuel limiter control feature for smoke reduction during acceleration. During rapid acceleration or deceleration, it is possible for the fuel limiter cam to disengage from the aligning slot. This can jam the governor in the "shutdown" position and prevent restarting the engine. A spring has been added to the fuel limiter control to hold the fuel limiter cam in place under all operating conditions. This puts a load or force on the cam at all times. Affected Engines And Part Needed All the listed engines are included in this Program. Model Serial Numbers 3508 Marine (High Speed) 96Y578-96Y596, 599-604 3508 Industrial (High Speed) 95Y612-95Y618 3508 Industrial (Low Speed) 68Z676 3512 Marine (High Speed) 50Y405-50Y408, 410, 412-423, 425-426, 429-435, 437, 438, 440-460, 462, 463, 467, 471, 473-475, 478-518 3512 Vehicular (High Speed) 51Y451, 453, 455-472 3512 Industrial (High Speed) 49Y355, 359, 360, 378, 380-388, 390, 405-418, 421 3512 Industrial (Low Speed) 65Z585-65Z590 3512 Marine (Low Speed) 66Z153 The new parts needed: 1 - 2W8511 Spring Action Requested This PIP, if done, should be done at the same time as several other PIP's on 3508 and 3512 Engines. Review your PIP records and Service Letters. Install the listed spring in the Woodward UG8L Governor on all the listed engines. It is not necessary to remove the governor from the engine, nor the fuel limiter from the governor. Use Special Instruction SEHS8379 to install the spring. This form is included with the new spring. Warranty Allowances List the new part on the claim, and one hour labor at your selling rate. (This is a one-hour job.) Prepare each claim in accordance with your Warranty Bulletin on PIP's.