4UY-90 top view — double grid-chain conveyor and digging frame
4UY-90 Potato Harvester
Three-point 900 mm potato digger with double grid-chain conveying
- 900 mm working width
- 70–100 HP (Bridge)
- 540 r/min PTO
- Double grid-chain
Overview
The 4UY-90 is a three-point-suspension potato harvester with a 900 mm working width, 560 kg structure and 540 r/min PTO drive, designed to match 70–100 HP (Bridge) tractors. Its double grid-chain conveying system, 65Mn shovel blade and depth-roller limiting mechanism provide stable digging at 0–400 mm depth, with adjustable working height to suit different field conditions.
Key features
900 mm working width
Single-pass digging width matched to 70–100 HP (Bridge) tractors for efficient potato lifting at an estimated 0.167 ha/h.
Double grid-chain conveying
Two-stage grid chain with 75/55 mm clearance separates soil progressively while transporting tubers to the rear discharge.
Depth-roller limiting
Depth-roller mechanism with 0–400 mm adjustment keeps digging depth uniform across uneven beds.
Hardened wear parts
65Mn shovel blade and 55CrSi chain bars resist abrasion in stony or clay soils for longer service life.
Typical applications
4UY-110 Potato Harvester
Three-point 1100 mm potato digger with double grid-chain conveying