Bulldozer Komatsu D275A-5D Hydraulic Pump Main Pump Piston Pump 708-1L-00340 708-1L-00341 High-performance hydraulic main pump designed specifically for Komatsu D275A-5D bulldozers, compatible with part numbers 708-1L-00340 and 708-1L-00341. Common Faults & Symptoms Abnormal pump noise: Worn pistons and slippers, scratched valve plate; air ingress in suction line, contaminated hydraulic oil. Insufficient output pressure: Internal leakage caused by worn piston pairs and aged