ZX200 ZX210 ZX230 ZX270 hydraulic pump

Quick Answer The travel motor assembly on a Hitachi ZX200 is a two-speed axial-piston travel motor with built-in planetary reduction and a parking brake, known by the designation HMGF38DA. Choosing the right one is not a matter of picking a favourite number, because eight part numbers are commonly quoted for this one machine — 9168003, 9195451, 9234034, 9237802, 9191194, 9199841, 9190295 and...

Quick Answer The main pump on a Caterpillar 336F is a variable-displacement axial-piston pump — Cat catalogues this unit as 377-4950, a "2P Series Hydraulic Pump", and the trade knows it as the SBS180. It does one job: turn engine rotation into hydraulic flow and pressure, and then vary that output continuously so the machine gets exactly the flow the operator is asking for. Understanding ho...

Quick Answer The Kawasaki K3V112DT is so common on 20-tonne excavators for one simple reason: it is the pump that most of the industry settled on at the same time. Volvo, Hyundai, Doosan, Sumitomo, Kobelco and others all bought the same Kawasaki pump for their 20-tonne machines, so the K3V112DT has the largest installed base in the class. The practical consequence for buyers is that almost every 2...

Quick Answer Every piston pump leaks a little oil internally, and that oil has to go somewhere — it drains out of the pump case through the case drain line. That is the diagnostic gift: case drain flow is internal leakage made visible and measurable. On a PC600-6, measuring case drain flow at operating temperature, at a defined operating point, tells you how worn the pump is long before the ...

Quick Answer Your CAT 312C needs the SBS80 because that is the pump size matched to a machine of this class. A 12 to 13 tonne excavator has a moderate engine and a moderate flow demand, and the pump has to sit exactly between the two: too large and the engine lugs and burns fuel; too small and the functions starve under load. The SBS80 is the twin axial-piston main pump built for that balance, del...

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...