Komatsu 20T-60-72110 hydraulic pump for Komatsu PC40 PC45 PC55 mini excavator
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Product Overview
Komatsu's PC40, PC45 and PC55 form the backbone of small‑scale construction worldwide — utility trenching, house foundations, backfilling and site tidy‑ups where a full‑size excavator simply will not fit. Despite their compact footprint, these machines carry real digging force, and that force is delivered by the small axial piston pump at the heart of each one. The part numbers 20T‑60‑72110, 708‑3s‑00872 and 708‑3s‑00522 cover the pump configurations used across this model family, and our aftermarket units are built to those original specifications. When one of these pumps wears, the machine shows it immediately: the boom lifts slower, the bucket curl goes soft, the tracks lose their pull on slopes, and a rising note from the pump housing confirms internal clearances have opened up. Because these small machines work through long, low‑cost jobs, a hydraulic problem hits the daily rate hard. This aftermarket pump restores the original flow and response, so a worn unit can be exchanged directly and the compact Komota gets back to earning.
Core Advantages
1. One supply source covers three related pump configurations
Rather than tracking down separate suppliers for each part number, workshops can source all three configurations — 20T‑60‑72110, 708‑3s‑00872 and 708‑3s‑00522 — from one consistent production line. That simplifies stocking and simplifies cross‑reference when an old pump tag has worn away.
2. Hardened internals for the dusty reality of mini‑machine work
Small excavators operate close to the ground, where fine dust and contamination are unavoidable. Hardened piston, cylinder block and valve plate surfaces resist abrasive wear, helping the pump hold its pressure output through long service hours.
3. Responsive metering for close‑quarters digging
The regulator follows the original pump mapping, so the machine keeps its precise boom and bucket control — essential when digging next to foundations, pipes or existing walls. No lag, no surging, just the original feel.
4. A direct fit that suits compact‑machine service schedules
The pump reproduces the original mounting and port layout, so removal and refitting follow the standard Komatsu service routine. No adapters, no fabrication, no extended bench time.
5. A cost‑effective aftermarket choice for busy small fleets
Mini excavator work depends on machine availability. This aftermarket pump restores full hydraulic performance at a fraction of the dealer exchange price, with sample and batch supply for workshops running several PC40/PC45/PC55 units.
Manufacturing & Quality Control
Each pump is produced under controlled conditions: incoming material verification, precision machining, surface hardening and careful assembly. Every completed unit is bench‑tested for pressure, flow and running noise before packing, and only passing units are released. Anti‑rust preservation and cushioned export packing protect the pump during storage and long‑distance transport.
Frequently Asked Questions
Q1: Which of the three part numbers do I need?
A: Check the tag on your existing pump. If it is unreadable, send your machine serial number and we will match the correct configuration — the PC40, PC45 and PC55 can carry different pump variants by build year.
Q2: Are these three pumps interchangeable between the models?
A: They cover the pump family across the range, but mounting and spline details can differ. We confirm the exact unit against your machine before dispatch.
Q3: What faults point to pump wear?
A: Slow or soft boom and bucket movement, weak tracks, a rising pump whine and quicker oil warm‑up. Inspect before contamination circulates through the small hydraulic circuit.
Q4: What is the warranty coverage?
A: Manufacturing and material defects are covered. Damage caused by contaminated oil, wrong fluid, foreign objects, overload or incorrect installation is excluded; renew the oil and filters when fitting the new pump.