Cover Large Fields Quickly with the KUHN Vari-Challenger

This high-performance plow offers up to 10 bottoms per side to cover large fields quickly with unmatched weed and residue burial.

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Combining excellent productivity with easy hydraulic adjustment, the KUHN Vari-Challenger is the ultimate semi-mounted rollover plow. This high-performance machine offers up to 10 bottoms per side to cover large fields quickly with unmatched weed and residue burial. Infinitely adjustable plowing widths from 14” – 22” allow you to hydraulically adapt to changing field conditions from the comfort of the tractor cab. Hydraulic articulation keeps the forged shares and the Triplex steel moldboards firmly in the ground, even in undulating terrain. Thanks to the pivoting hitch headstock, turns up to 110° are possible to save valuable time at the headlands and on the road.

Your benefits

Heavy-Duty Components for an Increased Machine Life


Triplex Steel

Moldboards are made of unequal layer, heat-treated Triplex steel that have an increased working life up to 40% over standard steel and a hard wearing surface over 1/8” thick.

Strong Backbone

Strength and durability starts with a strong backbone. In this case, the main beam measures a stout 8.7” by 8.7”. Many of the moving parts have been integrated into the machine’s structure to safeguard against impact, humidity and dust.

NSH System

Non-Stop Hydraulic (NSH) reset comes standard and protects the points, shares and other critical components from damage by rocks or foreign objects. The NSH system allows each individual bottom to move up to 27.5” vertically and nearly 8 inches laterally.
Non-Stop Hydraulic Reset.jpg

Well Formed Plowing with Moldboard Choices


H4 Moldboard

The H4, helicoidal, Scandinavian-type moldboard provides well-formed plowing to a normal depth range of 7-12”. The share is fitted with a reversible/replaceable point that greatly increases the life of the share. Recommended for fall plowing, the H4 moldboard is especially suited for heavy and damp clays. Furrow passes are well defined and trash burial is excellent.

N Moldboard

The helico-cylindrical N moldboard plows to a depth of 14”. Designed to be highly versatile, it is cylindrical at front, helicoidal at rear. A low draft ensures a partly broken furrow with excellent trash burial. Recommended for spring plowing, this moldboard is versatile and works well in sandy or clay soils.


Reversible for maximum efficiency. More pronounced shape at wearing zones on the point for longer life and better protection of the landside. Point is self-sharpening for good ground penetration of at all times.

Enhance Your Productivity in the Field


Hydraulically Adjustable Plowing Width

Users can easily adjust the plowing width from the tractor cab. The furrow can be narrowed to 14” for deep plowing and/or heavy soils. Increasing the furrow width to up to 22” improves productivity when working at shallower depths in lighter soil conditions.

On-Land Hitch

The Vari-Challenger includes an on-land hitch as standard equipment to accommodate large tractors with dual wheels. An available offset hitch kit offers even further clearance for extra-wide tires. Tracked tractors will especially benefit from the optional front mounted undercarriage, as it reduces the weight on the tractor for improved traction and handling. If the conditions require it, the plow can also be converted to an in-furrow machine.

Rear Body Lift

Hydraulic lift allows for progressive furrow entry by angling the main beam. This creates a smoother and more even headland and lowers fuel consumption. The rear section (behind the transport wheels) can be lifted out of the ground completely so only the front section is plowing, reducing power requirements in extremely difficult soil conditions.



 Vari-Challenger 7Vari-Challenger 8Vari-Challenger 9Vari-Challenger 10
Number of bottoms per side (front + rear) 7 (4+3) 8 (5+3) 9 (5+4) 10 (6+4)
Extendable by one bottom Yes, at front Yes, at rear Yes, at front No
Standard moldboards H4 long helicodial H4 long helicodial H4 long helicodial H4 long helicodial
Hydraulic rollover with 2 cylinders Standard Standard Standard Standard
Maximum tractor power 315 hp (234 kW) 360 hp (268 kW) 405 hp (302 kW) 450 hp (336 kW)
Approximate machine weight for NSH version 13,210 lbs (5,992 kg) 14,092 lbs (6,392 kg) 14,974 lb (6,792 kg) 15,856 lbs (7,192 kg)
Working width 14" to 22" (35 to 55 cm) 14" to 22" (35 to 55 cm) 14" to 22" (35 to 55 cm) 14" to 22" (35 to 55 cm)
Underbeam clearance 31.5" (40 cm) 31.5" (40 cm) 31.5" (40 cm) 31.5" (40 cm)
Point to point clearance 40" (102 cm) 40" (102 cm) 40" (102 cm) 40" (102 cm)
On-land hitch kit Standard Standard Standard Standard
Two-wheel undercarriage with suspension for transport Standard Standard Standard Standard
Sequencing valve - combines lift and rollover functions Standard Standard Standard Standard
Hitch Cat. 3 cross shaft with swift hitch Cat. 3 cross shaft with swift hitch Cat. 3 cross shaft with swift hitch Cat. 3 cross shaft with swift hitch
Beam dimensions 8.7" x 8.7" (22 x 22 cm) 8.7" x 8.7" (22 x 22 cm) 8.7" x 8.7" (22 x 22 cm) 8.7" x 8.7" (22 x 22 cm)
Offset adjustment Hydraulic Hydraulic Hydraulic Hydraulic
Adjustable depth wheel with tire Standard Standard Standard Standard