ناقل الحركة النهائي K1037757 لـ حفارة متوسطة الحجم Doosan DH225

DH225 Final Drive for Excavator spare parts K1037757 hydraulic motor reducer Aftermarket

Product Overview

The Doosan DH225 is one of the most familiar 22‑ton machines on earthmoving and rental fleets, and its final drive — the hydraulic motor and planetary reducer under each track — is among the most commonly renewed wear parts it needs. Every time the machine climbs a ramp, pushes through soft ground or reverses across broken terrain, that drive is turning hydraulic pressure into sprocket torque under the full weight of the machine. Wear shows up gradually at first: a slight tug to one side, a note from the track motor that was not there last month, the drive housing warm to the touch after a short run. Left alone, it worsens into a track that slips on grades and eventually will not pull, and by then the piston group and reduction gears are usually scored against each other. The aftermarket assembly carrying part number K1037757 reproduces that original motor‑and‑reducer pairing as a single sealed unit, so the worn drive can be unbolted and replaced without cross‑matching components — the DH225 moving again with a minimum of downtime.

Core Advantages

1. Motor internals held to tight pressure‑holding clearances
The piston group, cylinder block and valve plate are machined to close tolerances so the motor does not lose pressure internally. That is what keeps both tracks pulling evenly under load and stops the machine wandering or slipping on slopes.

2. Reduction gears cut to run quietly and share the load
Inside the reducer, hardened planetary gears mesh with controlled backlash. Smooth, even meshing means no clicking or grinding from the track, and the load spread across the teeth is what lets the gear set survive years of track‑push duty.

3. Seals chosen for the reality of site conditions
Final drives live with mud, dust and standing water. Fitted shaft and housing seals keep contamination out of the motor and gear oil, which is the most cost‑effective protection against the abrasive wear that ends so many drives prematurely.

4. Supplied as one matched, pre‑tested unit
Because motor and reducer arrive assembled and bench‑tested, the fitter swaps the whole drive in one operation. No sourcing separate parts, no uncertain matches, no second visit to the machine to chase an internal leak.

5. A repair that fits the value of an older DH225
For a machine already well into its service life, paying dealer prices for an original final drive rarely makes economic sense. This aftermarket unit restores track mobility at a cost that keeps the whole repair sensible, with sample and bulk orders welcome.

Manufacturing & Quality Control

Every drive is built under controlled conditions: incoming material inspection, precision machining of housings and gears, case hardening of wear surfaces and clean assembly. Before packing, each unit is run on a test stand to confirm output torque, leakage behaviour and running noise, with any unit outside acceptance limits rejected. Completed assemblies are oil‑protected, moisture‑sealed and shock‑crated for sea and overland shipping.

Frequently Asked Questions

Q1: How do I confirm K1037757 matches my DH225?
A: Compare the number on your existing final drive nameplate and share your machine serial number. DH225 build batches can differ, so we confirm the right unit before it leaves us.

Q2: Is this the complete drive, or just the motor?
A: The listing covers the full hydraulic motor and planetary reducer as one assembly, ready to bolt on. If your repair needs only the motor or the gearbox, ask and we will check what can be supplied separately.

Q3: What should the fitter watch when swapping the drive?
A: Bleed the travel circuit after fitting, check oil level, and run a slow no‑load test before working the track under full load. Refer to the Doosan service manual for the bleeding procedure.

Q4: What does the warranty cover?
A: Manufacturing and material defects are covered. Damage from contaminated oil, debris entering the motor, track obstruction, continuing to run a seized drive, or incorrect installation is excluded.