Moteur de translation GM35VL 31EM-40011 pour excavateur Hyundai R210LC-7 R210-7 R250-7 R250LC-7

R210LC‑7 R210‑7 R250‑7 R250LC‑7 Final Drive for Excavator spare parts 31EM‑40011 31N6‑40010 31EN‑42001 OEM

Product Overview

The Hyundai Robex ‑7 range covers a wide spread — the R210LC‑7 and R210‑7 are 21‑ton machines, while the R250LC‑7 and R250‑7 step up to 25 tons. What binds them is a common travel drive platform, covered by references 31EM‑40011, 31N6‑40010 and 31EN‑42001: an axial piston motor and planetary reducer tucked into each track frame, taking high‑pressure oil from the main pump and turning it into the slow, steady pull moving the machine across site.

On a worked Robex ‑7, the drive wears down in ways that crews often dismiss until they can no longer. One track lags on the ramp climb, the track shell warms faster than its opposite after a few cycles, and a low note builds through the floor under reversing. Most operators keep digging — but by then the piston block and valve plate have been lapping swarf into the oil. This OEM‑grade unit reproduces the original motor‑and‑reducer pairing as one sealed, bench‑tested assembly, covering all four model variants, so the worn drive lifts out whole and the new one bolts straight in.

Core Advantages

1. One platform covers four Robex models
The three references span the 21‑ton and 25‑ton ‑7 builds, so workshops running a mixed Hyundai fleet keep one range on the shelf rather than four separate parts.

2. A lapped piston group that holds pressure
The cylinder block, piston shoes and valve plate are finished to close clearance, so oil pressure does not bleed internally. Both tracks pull in step — no drift, no lazy side, no hesitation when the bucket loads up.

3. Hardened gears for mid‑size duty
The planetary gear set uses case‑hardened, ground teeth with controlled backlash. Smooth meshing spreads drive torque across several surfaces, keeping the reducer quiet as hours pile up.

4. Sealed for dust, mud and standing water
Robex ‑7 machines work through long shifts in mixed site conditions. Fresh shaft and housing seals keep grit out of the lube — the line between a drive that lasts and one that fails early.

5. OEM‑spec quality at a practical repair cost
Renewing the drive to original tolerances restores the Robex's mobility at a fraction of a Hyundai dealer exchange unit, with sample and bulk supply for workshops keeping several of these machines on the books.

Manufacturing & Quality Control

The OEM‑grade route follows controlled specifications: material certification, precision machining of housings and gears, case hardening of wear surfaces and clean assembly. Each completed drive runs on a test rig to verify output torque, internal leakage and running noise before release, and only passing units are packed. Full preservation coating, moisture sealing and shock‑absorbing export casing protect the assembly during transport.

Frequently Asked Questions

Q1: Which reference suits my machine?
A: Read the tag on your existing drive against 31EM‑40011, 31N6‑40010 or 31EN‑42001 and send the machine serial number. The references span the 21‑ and 25‑ton builds, so we confirm the exact unit before dispatch.

Q2: Will the same drive fit both the R210 and R250?
A: The platform is shared across the ‑7 range, but internal displacement can differ between the 21‑ and 25‑ton machines. Send the serial number and we match the correct variant rather than assuming.

Q3: What break‑in should the operator follow?
A: Take the first shift easy on loaded grades. Light cycling seats the new gears and seals, then check oil level and fitting torque after the first day.

Q4: Can I ship this by sea to African ports?
A: Yes — drives this size ship well by sea. Tell us the destination port and we will quote door‑to‑port or door‑to‑door, including any inland trucking needed.

Q5: What is the warranty position?
A: Manufacturing and material defects are covered. Damage from contaminated oil, debris in the motor, track obstruction, overload or incorrect installation is excluded. Photograph any arrival damage before uncrating.