komatsu pc300 hpv140 main pump

Quick Answer A CAT 320C or 320D pump loses power under heavy load for one fundamental reason: internal leakage grows as pressure rises. At light load the wear is invisible — the pump simply strokes a little further and the machine feels normal. Put the bucket into hard ground, pressure climbs, more oil escapes past worn plungers and valve plates instead of reaching the actuators, and the mac...

Quick Answer The main pump on a Komatsu PC300-8 or PC350-8 is an HPV140 class unit, ordered under 708-2G numbers. The catch is that the -7 and -8 generations share this pump family and cross-list each other's numbers — in the market, 708-2G-00024 is quoted predominantly against the -7 machines (PC300-7, PC350-7, PC360-7), while 708-2G-00700 and 708-2G-00150 are listed for the -8 machines. On...