excavator hydraulic pump brand selection guide

Quick Answer To match the right hydraulic pump to your Komatsu or Hitachi excavator, you need five things: the machine model and serial number, the pump displacement, the control type (load-sensing / negative control), the mounting and spline, and the port layout. The fastest way to get all five is to read the two plates — the machine plate (model + serial) and the pump nameplate — and...

Quick Answer This is a representative travel-motor repair case from the field (machine details anonymised). A 20-ton class excavator began pulling to one side and losing power on slopes. After ruling out the cheap causes, testing showed high case-drain flow and a hot final drive on the right track — the classic signature of an internally worn travel motor. The fix was a complete travel motor...

Quick Answer The control valve assembly is the "brain" of an excavator: it directs the pump's oil to every function. You must replace it when the body or bore is damaged, when a spool sticks or leaks internally beyond repair, when metal contamination has scored the valve, or when the valve has been rebuilt once already and failed again. You choose the right model by matching six points: machine mo...

Quick Answer The Kobelco SK200-6E uses a Kawasaki K3V112DTP tandem pump — the same basic 112 cc family fitted to many 20-ton excavators. The order number is YN10V00022F2, and the full pump code is K3V112DTP-1TLR-9TFL-V. The trap is this: two pumps can both say "K3V112DTP" yet not interchange, because the suffix blocks (control type, regulator, rotation, porting, mounting) differ between mach...

Quick Answer This page is a quick reference for the main hydraulic pump assembly on the Komatsu PC200-7 and PC220LC-7 excavators. The assembly is a twin (tandem) variable-displacement axial-piston pump — two pumping sections in one housing — ordered under 708-2L-31123 or 708-2L-00300. It weighs about 195 kg and ships in a 53 × 53 × 81 cm case. Use the tables below to identi...

Quick Answer The main pump is the heart of a Komatsu PC200-8 excavator. It takes mechanical power from the engine and turns it into hydraulic power — pressurised oil flow — that moves every boom, arm, bucket, swing and travel function. The PC200-8 uses a variable-displacement piston pump: instead of always pumping the same amount, it continuously changes its output to match what the op...

Quick Answer The Komatsu PC300-7 is a 30-tonne class machine, and its main pump is the HPV140 — a variable-displacement piston pump. "HPV140" identifies the pump model and size class, but like every hydraulic pump it is built in several variants, so two pumps can both say HPV140 and still not match your machine. To select the right one, work through four matching points: machine model and se...

Quick Answer The Hyundai R210W-9 / R210W-9S is a wheeled 21-tonne class excavator, and its main pump is the K3V112DP — a variable-displacement piston pump from the Kawasaki K3V112 family. Choosing the best-matched pump comes down to a short, repeatable flow: identify the machine → read the pump code on the nameplate → confirm the control variant → check mounting, shaft and por...