PY15V00005F1 final drive for Kobelco SK45SR mini excavator
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Product Overview
The Kobelco SK45SR is built for jobs where there is simply no room to swing — tight urban sites, interior demolition, narrow trenching between buildings. Its short‑radius design puts the engine and counterweight within the track width, but that compactness means the final drives under each track carry real burden: they have to move a 4.5‑ton machine through confined, uneven ground all day. The travel motor assembly referenced by part number PY15V00005F1 is the unit that does that work, combining an axial piston motor with a planetary reducer. On a machine used in tight circles, wear announces itself gradually: the two tracks do not quite match up, the machine drifts instead of rolling straight, the drive housing warms after a run, and a faint note builds inside the track frame. Because the SR undercarriage is cramped, reaching a failed drive is awkward work — which makes supplying the correct matched assembly important. This drive is built as one tested motor‑and‑reducer unit, so the worn one can come off and the new one bolt straight back on.
Core Advantages
1. Even track pull from pressure‑tight motor internals
The piston, cylinder block and valve plate are finished to close clearances, so hydraulic pressure stays inside the motor rather than bleeding away. Both tracks then push in step — no drifting, no slow side, no hesitation when the bucket digs in.
2. Reduction gears tuned for short‑radius working cycles
An SR machine pivots and reverses constantly in confined spaces. Hardened planetary gears with controlled backlash absorb that daily reversing load smoothly and quietly, without the clicking or grinding that tells you the teeth are hammering themselves.
3. Sealed for dusty, muddy compact‑site conditions
Compact drives sit low to the ground, taking mud, water and fine dust all shift. Fitted shaft and housing seals keep that contamination out of the motor and gear oil — the protection that decides whether the drive lasts years or months.
4. One matched, tested unit for an awkward undercarriage
Because motor and reducer arrive pre‑assembled and bench‑checked, the whole drive swaps out in one go. On an SR undercarriage where space is tight, that straightforward fit saves the fitter from wrestling separate components.
5. A sensible repair for a busy compact Kobelco
SK45SR machines stay in high demand on urban and demolition work. Renewing the drive to original spec keeps the machine earning at a cost well below a dealer exchange, with sample and batch supply available.
Manufacturing & Quality Control
Each drive is built under controlled conditions: incoming material inspection, precision machining of housings and gears, hardening of wear surfaces and clean assembly. Before packing, every unit runs on a test bench to confirm output torque, internal leakage and running noise, and only passing assemblies are released. Preservation coating, moisture sealing and shock‑absorbing compact packing protect the drive during storage and freight.
Frequently Asked Questions
Q1: How do I confirm PY15V00005F1 matches my SK45SR?
A: Compare the reference on your existing drive and share your machine serial number. Compact Kobelco variants can differ, so we verify before dispatch.
Q2: Is this the complete travel motor and reduction?
A: Yes — the listing covers the full motor and planetary reduction as one assembly, ready to bolt on. Separate components can be checked on request.
Q3: What faults point to final drive wear?
A: Mismatched track speeds, drifting on flat ground, a warm or noisy track motor and hesitation under load. Inspect early, before debris circulates through the travel circuit.
Q4: What should the fitter do after installation?
A: Bleed the travel circuit, check oil level and run a slow no‑load track test before working under full load. Follow the Kobelco service manual for the bleeding procedure.