Kawasaki K3V112 hydraulic pump for Kobelco SK200-5.5 midi excavator
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Product Overview
Few excavator families have aged as well as the Kobelco SK200 series, and the SK200‑5.5 remains a familiar sight on small‑to‑mid earthmoving projects, utility work and demolition sites long after newer models arrived. At the centre of its hydraulic system sits the K3V112 axial piston pump — the component responsible for turning engine power into the flow that lifts, digs, swings and travels. On a machine of this age, the pump rarely fails suddenly; it drifts. Boom lift slows at the end of a long day, the bucket curls a fraction weaker, the hydraulic oil holds heat a little longer, and eventually a mechanical note from the pump housing confirms that internal clearances have opened up. Because the SK200‑5.5 is often kept working well past its warranty years, choosing an OEM‑grade replacement matters: tolerances that match the original pump, rather than a looser aftermarket approximation, are what keep these older machines performing predictably. This OEM‑grade K3V112 is built to the original specification so a worn pump can be exchanged directly, restoring the hydraulic response the machine was designed for.
Core Advantages
1. OEM‑grade tolerances for a machine that needs them
An older hydraulic system has built‑in wear in valves and lines. A pump held to OEM tolerances compensates for that rather than amplifying it — the result is stable pressure and flow, not a temporary performance spike that fades within months.
2. Factory‑calibrated control for legacy hydraulic circuits
The regulator is set to the original K3V112 mapping, so the pump behaves as the machine's older‑generation controls expect. That means smooth boom and arm response, consistent swing, and no surprise loading of the engine during digging.
3. Hardened running surfaces that match long‑duty expectations
Piston shoes, cylinder block and valve plate are finished to OEM surface standards, resisting the fine contamination that older circuits tend to carry. Durable friction pairs are what extend the interval between overhauls on a high‑hour machine.
4. Documented interchangeability for confident ordering
Each unit is checked against the original mounting and part references before dispatch, so the workshop receives a pump that fits on arrival — no surprises during installation, no downtime waiting for replacement parts.
5. A reliable supply line for a widely installed legacy machine
The SK200‑5.5 still works in large numbers globally, and this pump keeps them running. We support owner‑operators, repair workshops and parts distributors with consistent batch quality, not one‑off samples.
Manufacturing & Quality Control
The OEM‑grade route follows Kobelco‑aligned specifications: material certification, precision machining, controlled heat treatment and assembly under clean conditions. Every pump undergoes bench testing for pressure output, flow rate and running noise, with results recorded before release. Finished units receive full preservation treatment and are packed in sealed, shock‑cushioned export cases, keeping them protected until installation.
Frequently Asked Questions
Q1: Will this K3V112 fit other SK200 variants?
A: It is specified for the SK200‑5.5. Close variants can share the platform, but please send your machine serial number and the old pump part number so we can confirm the configuration before shipping.
Q2: What does OEM‑grade mean in practice for this pump?
A: It means machining tolerances, surface finish and regulator calibration are held to original standards rather than economy‑grade limits. The pump delivers original‑spec performance and durability, not just a physical fit.
Q3: An old machine like this has worn oil lines — do I need to flush the system?
A: Yes, we recommend a full oil and filter service with circuit flushing when fitting a new pump. Residual debris in an older circuit is the fastest way to shorten the life of fresh friction surfaces.
Q4: How should the pump be stored before installation?
A: Keep it in its sealed packaging, indoors and dry. The preservation oil covers storage for reasonable periods; if the unit will sit for months, inspect the coated surfaces before fitting.