Manual Mode Transmission functions as a conventional direct drive with 8.For the first 3 years or 2,000 hours, whichever comes first, you’ll receive: Regular service at 500, 1,000, 1,500 and 2,000-hour intervals and 250 hours if applicable. Komatsu D21P-6 Bulldozer Full Service Repair Manual. A factory Komatsu Service Manual is the only reliable choice. Komatsu d21p transmission fluid The metal shaft when the engine is found by a rear axle drive and mounted from the cylinder.