This is an exact-model Hongyou product page for international agricultural machinery buyers. The current factory drawing and selected configuration should be confirmed before ordering.
The 4JR-90 is a Hongyou field-machinery configuration described by the supplier page as a seedling killer for potato foliage. It has a 900 mm working width, a three-point suspension and a published 260 kg weight. It is relevant before harvesting when foliage management is required to improve access to the crop bed.
The listed blade set contains 36 curved flail blades and 10 straight flail blades. The correct operating setting depends on crop condition and field surface. A top-cutter should be used as part of a planned harvest sequence, not as a substitute for assessing crop maturity and machinery clearance.
Published technical specifications
- Working width: 900 mm
- Overall weight: 260 kg
- Matching power: ≥45 HP
- Output-shaft speed: 540–720 r/min
- Linkage: Three-point suspension
- Curved flail blades: 36
- Straight flail blades: 10
- Working dimensions: 1,350 × 1,150 × 900 mm
Buyer questions
What is the working width of 4JR-90?
The supplier record lists a 900 mm working width.