Travel motor · 8–10 t class
FDNB12
Travel drive assembly — swash plate piston motor + two-stage planetary reducer
FDNB12 is a travel motor assembly in the FLUTEK catalogue, Travel drive assembly — swash plate piston motor + two-stage planetary reducer. 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: our own unit photo. Structure drawing: FRANK English sample catalogue, page 61.
Compatibility — which machines this fits
Parts for travel devices are confirmed per order against the factory parts book - there is no published position-numbered parts table for this family, so we do not print one. Send the machine model and the unit nameplate and we confirm the internal parts, seal kit and brake parts before quoting. Fitment lists are compiled from public market data; contact us to confirm your exact machine and shaft / control variant.
Specifications
| Application class | 8–10 t excavator |
|---|---|
| Max flow | 55 L/min |
| Relief valve set pressure | 28 MPa |
| Motor displacement | 45 cm³ (max. 54.9), speed-2: 22.9 cm³ |
| Gear ratio | 53.706 |
| Theoretical output speed | 22.8 / 44.7 min⁻¹ (speed 1 / 2) |
| Theoretical output torque | 10,773 / 5,484 N·m (speed 1 / 2) |
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
- Motor integrates safety relief valve, balance valve and mechanical parking brake
- Two-stage planetary reducer, compact and lightweight
- Optimised valve plate and oil ducts for lower noise and pressure pulsation
- Shock relief valve for better controllability
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
Specifications on this page are taken from the FLUTEK English catalogue dated 2024-11-25 and match the pumps and swing units we ship as China general agent. Machine fitment lists are cross-checked against our parts books before dispatch — send us your machine and pump nameplate and we confirm the correct shaft and control variant.
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.
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.
Cylinder drifts down under load
Boom, arm and cylinder functions
Drift is a leakage question. These checks tell you whether oil is passing the piston seal, the control spool or the holding valve…
Oil temperature keeps rising
Oil, filtration and the system as a whole
Over-temperature thins the oil and shortens seal life, so every function weakens.
Foam or milky hydraulic oil
Oil, filtration and the system as a whole
Foam means air, milkiness means water, and both destroy the lubrication film.
Parts that usually solve them
Catalogue lines from the same families. Search the full library by part number from the parts library.