Bộ truyền động bằng xích K1037757 dành cho máy đào cỡ vừa Doosan DH200-5 DH200-7

DH200‑5 DH200‑7 Final Drive for Doosan Excavator spare parts K1037757 Aftermarket

Product Overview

The Doosan DH200‑5 and DH200‑7 are two generations of a 20‑ton excavator design that kept working on earthmoving and infrastructure sites long after they rolled off the production line. The final drive under each track — the hydraulic motor and planetary reducer referenced by part number K1037757 — is shared across both machines, which makes it one of the most familiar references in Doosan repair shops. It is the unit that converts hydraulic flow into the low‑speed, high‑torque rotation that pulls these 20‑ton frames across rough ground. On older machines clocking serious hours, wear arrives gradually: one track lags, the machine drifts on flat ground, the drive housing runs warm, and a note builds from the track motor. Left alone, it worsens into a track that slips on grades. By then the piston group and reduction gears are already scoring against each other. This aftermarket drive reproduces the original K1037757 motor‑and‑reducer pairing as a single tested unit, covering both the DH200‑5 and DH200‑7 — the worn drive comes off and the new one bolts straight back on.

Core Advantages

1. One reference covers two Doosan generations
Because this drive fits both the DH200‑5 and DH200‑7, workshops maintaining aging Doosan fleets can stock a single unit and cover both machines. That simplifies cross‑reference when the old nameplate has worn away.

2. Pressure‑tight motor internals for even track pull
The piston, cylinder block and valve plate are finished to close clearances so the motor holds its pressure rather than leaking internally. Both tracks then push the same — no tug to one side, no slipping on slopes, no wandering on flat ground.

3. Hardened gears for a 20‑ton machine's daily duty
The planetary gear set is case‑hardened and precision‑cut with controlled backlash. That keeps meshing smooth and quiet, spreads the drive torque across the teeth and slows the wear that comes from years of track push and breakout force.

4. Supplied as one matched, pre‑tested unit
Motor and reducer arrive assembled and bench‑checked, so the fitter swaps the whole drive in one operation. No matching separate parts, no mid‑job surprises — important when a stationary 20‑ton machine is losing money by the hour.

5. Aftermarket pricing that suits aging Doosan fleets
Many DH200 machines are well into their working life, and an original drive exchange is hard to justify against the machine's value. This aftermarket unit restores track mobility at a cost that keeps the repair sensible, with sample and bulk supply both available.

Manufacturing & Quality Control

Production follows a controlled route: incoming material verification, precision machining of housings and gears, case hardening of wear surfaces and clean assembly. Every completed drive is tested on a bench for output torque, internal leakage and running noise before release, and only passing units are packed. Preservation oil, moisture sealing and shock‑absorbing crating protect the assembly through long‑distance freight.

Frequently Asked Questions

Q1: Does this drive fit both the DH200‑5 and DH200‑7?
A: The K1037757 reference is shared across both generations, but build variants can occur. Please share your machine model and serial number so we confirm the correct unit before dispatch.

Q2: Is this left or right side?
A: The drive design is common across both sides on this platform. If your old unit carries a side‑specific marking, send it over and we will match it.

Q3: What symptoms mean the drive needs replacing?
A: Uneven track speed, pulling to one side on level ground, a hot or noisy track motor and tracks that fail to pull under load. Inspect before contamination circulates through the travel circuit.

Q4: What is the warranty position?
A: Manufacturing and material defects are covered. Damage from contaminated travel oil, debris in the motor, track obstruction, forcing a failed drive, or incorrect installation is excluded.