Doosan TM18VC K1018811J final drive for Daewoo DH150LC-7 DX140LC S150LC-7B DH150 DX140 midi excavator
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1. OEM Part Number & Machine Compatibility
Original travel motor model: Doosan Mottrol TM18VC integrated final drive assembly (hydraulic motor + 3-stage planetary reduction gearbox)
Doosan OEM interchange part numbers: K1018811J, K1014772A, 170401-00029, 170401-00029A, 170401-00029C, 170401-00035
Fully compatible midi excavator models: Daewoo DH150LC-7, DH150, Doosan DX140LC-7, DX140, Solar S150LC-7B
All six serial numbers are iterative supersession upgrade codes, identical mounting flange, sprocket hub, hydraulic port layout and internal hydraulic calibration; fully cross-replaceable direct bolt-on aftermarket replacement without modification
2. Core Technical Specifications
Structure type: Two-speed variable displacement hydraulic travel motor (first stage low speed high torque / second stage high speed travel) + three-stage planetary reduction gearbox
Motor displacement: 43.8 / 68 cm³/rev dual displacement design
Gear reduction ratio: 53
Second Stage Specified Parameters (High-Speed Travel Stage)
Rated working pressure (second stage): 30.0 MPa
Maximum relief pressure (second stage): 34.3 MPa
Rated operating speed (second stage): 3300 rpm
Corresponding rated input power (second stage): 33.8 kW
Max output travel torque: 19300 N·m
Output travel speed range: 36~57 rpm, perfectly matched to factory hydraulic system of 14–15 ton midi excavator platform
Mounting bolt PCD, sprocket tooth size, A/B feed oil ports and drain port strictly conform to Doosan OEM dimensional drawings
Gearbox housing & motor casing adopt high-strength ductile iron; internal pistons, valve plates, planetary gears and bearings use quenched wear-resistant alloy steel for heavy-load durability
3. Internal Structure & Functional Introduction
Dual-displacement hydraulic travel motor provides two working modes: low-speed high torque for climbing, mud and heavy excavation; second-stage high-speed mode for flat ground fast transfer
Integrated multi-disc mechanical parking brake with spring-applied, hydraulic release design, reliable holding performance on slopes
Three-stage planetary reduction gear set amplifies motor torque to drive track sprocket, stable power output under continuous heavy load
Built-in anti-reverse valve and shock relief valve to absorb hydraulic impact, protect motor and gearbox from pressure surge damage
Compact integrated final drive layout fits perfectly inside the track frame space of DH150 / DX140 series midi excavators
4. Product Advantages
Standard aftermarket replacement, 1:1 OEM casting dimensions, plug-and-play installation, no cutting or reworking of hydraulic pipelines, track frame or mounting brackets
Every finished aftermarket final drive passes full hydraulic bench inspection before shipment, including two-speed switching test, pressure stability, leakage test and brake holding torque verification
Complete overhaul spare parts in stock: floating seal, piston shoe assemblies, swash plate, valve plate, planetary gears, carrier, bearings and full seal repair kits for independent component replacement during maintenance
Multiple interchangeable OEM numbers cover six machine variants, simplify spare part ordering, stock classification and inventory management for machinery dealers and repair shops
Standard 12-month full warranty for aftermarket unit, stable performance comparable to genuine original Doosan Mottrol travel motor
5. Packaging & Global Delivery Details
Motor oil ports and spline shaft coated with anti-rust grease and sealed with dust-proof protective plugs
Whole final drive wrapped with moisture-proof plastic film and fixed inside export-grade solid wooden crate to avoid collision and damp corrosion during long-distance sea or air transportation
In-stock aftermarket units can be dispatched within 3–5 working days after order confirmation
Multiple global shipping solutions available: international air express, sea LCL/FCL bulk shipment, overland truck transport for Southeast Asian markets
6. FAQ
Q: Are K1018811J, K1014772A, 170401-00029, 170401-00029A, 170401-00029C, 170401-00035 mutually interchangeable?
A: Yes, all six part numbers are upgraded replacement codes for the same TM18VC final drive assembly, fully cross-replaceable for DH150LC-7, DH150, DX140LC-7, DX140, S150LC-7B.
Q: Can this TM18VC travel motor install directly on all listed Doosan/Daewoo models?
A: Yes, unified mounting size and factory-matched two-speed hydraulic calibration enable direct bolt-on fitting for all five machine models without extra adjustment or modification work.
Q: What is the relation between TM18VC and these Doosan OEM part numbers?
A: TM18VC is the official Mottrol original travel motor model designation, while the six serial numbers are exclusive OEM part numbers assigned by Doosan for this complete final drive assembly.
Q: Are separate repair spare parts available for this final drive?
A: Matching full overhaul seal kits, piston shoe assemblies, valve plates, swash plates, planetary gear sets, carriers and independent floating seal spare parts are all available for partial overhaul and single component replacement work.