Travel motor
FTD80
FTD80 travel drive assembly, 36~42 t class, cross-referenced to NABTESCO GM70VA / DOOSAN TM70VC/VD
FTD80 is a travel motor assembly in the FLUTEK catalogue, FTD80 travel drive assembly, 36~42 t class, cross-referenced to NABTESCO GM70VA / DOOSAN TM70VC/VD. It is ordered in the field as GM70VA. It is supplied as a complete unit rather than as loose parts, with the control variant matched to the machine.
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Photo: manufacturer's official travel drive image (range illustration). We photograph the exact unit we ship before dispatch — send us your nameplate.
Compatibility — which machines this fits
Machine classes and cross-references are taken from the manufacturer's travel device comparison table. Confirm the flange, ratio and brake torque on your machine before ordering.
Specifications
| Application class | 36~42 t excavator / drilling rig / crawler crane |
|---|---|
| Theoretical output torque to verify | max. 79,570 N·m (8,110 kgf·m) |
| Theoretical output speed | max. 43.5 min⁻¹ |
| Max pressure | 35.8 MPa (365 kgf/cm²) |
| Brake torque | 1,128 N·m (at motor shaft) |
| Flange pitch circles | D1 425 / D4 490 mm |
| Flange diameters | D2 380 / D3 450 mm |
| Axial lengths | L1 575 / L2 112 / L3 290 / L4 173 mm |
| Ports | SAE 1" / PF 1/4 / PF 1/2 |
| Bolt patterns | 26-M20 / 24-M20 |
| Cross reference | NABTESCO GM70VA / DOOSAN TM70VC/VD |
| Application | Kobellco, Sumitomo, JCB, DOOSAN, VOLVO, HYUNDAI, SANY, SDLG, XCMG, Liugong, FOTON, Lonking, Sunward |
| Pump line | FTD80 travel drive assembly (swash plate piston motor + two-stage planetary reducer) |
Cross reference / interchange
Buying against a number from a dismantled machine or an old invoice? Send it to us — we map it to the correct unit.
Key features
- Figures taken from the manufacturer's published product matrix
- Shaft, regulator and control variant confirmed before dispatch
- Genuine Korean-built unit
- Full spare parts support (cylinder block, valve plate, swash plate, seal kit, regulator)
Supply & commercial terms
Lead time, packing, freight terms, payment and warranty are confirmed per order on the quotation — ask us and you get them in writing together with the price.
Request a quotation
Model and quantity are pre-filled. Add your machine, destination port and contact details — we reply with price, lead time and shipping options.
Where these figures come from
Reference data for selection purposes. Please confirm the exact shaft, regulator and control variant with our team before ordering.
Common faults on this unit, and what to check first
The diagnosis guides below start from the symptom, list the checks in the order a workshop should work through them, and say which parts usually solve it. Full index: diagnosis guides.
Movement stutters or crawls when the lever is barely open
Boom, arm and cylinder functions
A function that moves smoothly at speed but stutters when the lever is barely open is fighting friction or air, not power.
Case drain flow above specification
Pump and pressure supply
Case drain flow shows how worn a pump or motor is without removing it.
All functions slow
Boom, arm and cylinder functions
When travel, swing, boom and bucket are all slow, the fault sits upstream of the individual circuits.
Machine slow or noisy when cold
Oil, filtration and the system as a whole
In low ambient temperatures the oil is the problem, not the pump.
Machine weak when it is hot
Oil, filtration and the system as a whole
In high ambient temperatures the hydraulic system runs near its thermal limits.
Repair the pump or replace it
Oil, filtration and the system as a whole
The decision follows measurable evidence, not the age of the machine.
Parts that usually solve them
Catalogue lines from the same families. Search the full library by part number from the parts library.