PLEASE CHECK YOUR OEM PART NUMBER FROM THE ORIGINAL UNIT TO ENSURE FIT. CATERPILLAR 320D EXCAVATOR CATERPILLAR 320D GC EXCAVATOR CATERPILLAR 320D L EXCAVATOR CATERPILLAR 320D2 EXCAVATOR CATERPILLAR 320D2 FM EXCAVATOR CATERPILLAR 320D2 GC EXCAVATOR CATERPILLAR 320D2 L EXCAVATOR CATERPILLAR 320E EXCAVATOR CATERPILLAR 320E L EXCAVATOR CATERPILLAR 320E LN EXCAVATOR CATERPILLAR 320E LRR EXCAVATOR CATERPILLAR 320E RR EXCAVATOR CATERPILLAR 324E EXCAVATOR CATERPILLAR 324E L EXCAVATOR CATERPILLAR 324E LN EXCAVATOR CATERPILLAR 330D2 Excavator CATERPILLAR 330F L Track Loader with Swing Boom 2384C Track Loader with Swing Boom 2484C Track Loader with Swing Boom 559C Track Loader with Swing Boom 579C CATERPILLAR MOBIL-TRAC AP-1000F Asphalt Paver CATERPILLAR MOBIL-TRAC AP-1055F Asphalt Paver CATERPILLAR MOBIL-TRAC AP600F Asphalt Paver CATERPILLAR MOBIL-TRAC AP655F Asphalt Paver D6K2 Track-Type Tractor D6K2 LGP Track-Type Tractor TRACTOR D6K2 XL TRACK-MOUNTED DOZER FITS / Part Numbers: CATERPILLAR: 3545671 NIPPONDENSO: 428000-9120 428000-9121 4280009122 PRODUCT DESCRIPTION: STARTER TYPE: DENSO TYPE: PLGR VOLTAGE: 24 ROTATION: CLOCKWISE TEETH: 10 PINION OD: 1.594″ / 40.5MM LENGTH: 9.646″ / 245MM MOUNTING EAR HOLE: 13.5MM UNTHREADED DISTANCE FROM MOUNTING EAR CENTER LUGS TO CENTER: 4.961″ / 126MM REGISTER OD DIAMETER: 3.622″ / 92MM WET CLUTCH SEAL: YES SPECS: WITH IMS RELAY SPECS: M12 B+ AND GROUND STUDS SPECS: M5 THREADED S-TERMINAL WEIGHT: 19 LBS