excavator hydraulic pump failure mining

Quick Answer "Losing power" on a CAT 329D is a symptom, not a diagnosis. The cause usually sits in one of four places: the engine (loses revs under load), the main pump (here, the SBS140), the control valve, or the control/electronic system. The fastest way to find it is a differential test: watch the engine rpm under load, then measure pump pressure and flow, then check the valve and settings. Th...

Quick Answer "Aftermarket" is not one product — it is a range of quality tiers. On a Hitachi HPV102 pump (used across the ZX200, ZX210, ZX230 and ZX270 families), you will meet everything from a genuinely high-quality aftermarket assembly to a low-end rebuild that shares the same casting and nothing else. The way to tell them apart is evidence, not appearance: a per-unit test report, verifia...

Quick Answer Two questions, two short answers.1. What is HPV95? HPV95 is the pump model designation for the Komatsu PC200-7 / PC220LC-7 main pump. It describes the type and size class of the pump — a variable-displacement piston pump. It is a model name, not an order number.2. What is the difference between 708-2L-31123 and 708-2L-00300? They are two order numbers for two different builds in...

Quick Answer 708-2L-00500, 708-2L-00400 and 708-2L-00490 are three order numbers quoted for the Komatsu PC200-8 main pump. They belong to the same 708-2L pump family — only the final block differs, and that block is what encodes the build. So the three numbers are three builds of one family, not three names for one part. Which one is right for you is decided by your pump nameplate code and y...

Quick Answer The 708-2G series is the Komatsu main-pump number group used on the PC300 / PC350 / PC360 class excavators — the 30-tonne platform that carries the HPV140 pump. The series contains more than twenty numbers, and they are not all the same kind of thing: some are complete pump assemblies, some are internal components of the pump, and some belong to different machines altogether. Re...

Quick Answer K3V112DP is the Kawasaki model of the main pump fitted to the Hyundai R210W-9S wheeled excavator. Read it in three parts:K3V — Kawasaki's variable-displacement, swash-plate type axial piston pump series. 112 — the displacement class, about 112 cc/rev per pumping section. DP — Double pump, Parallel type: two pumping sections in one assembly, arranged in a parallel con...

Quick Answer Fitting a new main pump to a CAT 329D is a 250 kg job, and how you do it decides whether the pump gives you its full service life or fails early. The sequence that matters is: confirm the pump → flush and renew filters → install clean → commission with settings checked → care for oil and temperature. Most "the new pump didn't last" cases trace back to something tha...

Quick Answer HPV102 is the Hitachi main-pump model used across the ZX200 / ZX210 / ZX230 / ZX270 class — but the model name alone will not get you the right pump, because the series comes in several variants (HPV102, HPV102GW, HPV102FW) and sits in a specific generation of Hitachi's line-up. It was introduced with the EX200-5 / EX220-5 and the early ZAXIS machines; the earlier generation use...