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NATPA of NE rules for Division IV & V combined.

Classes: 1959 and older.
NATPA of NE Four Hour Shows may not offer all classes!
  1. General Rules: See general rules that apply to all tractors.

  2. Age: Drivers must be 16 years of age or older. Those under 18 years of age must have written parental/guardian permission.

  3. Safety: All tractors must have a working safety kill switch. Ladder bars, wide front ends, fenders, use of seat belts and use of rev limiters are highly recommend.

  4. Draw Bar: Draw bar must not exceed 20 inches in height or be less than 18 inches from center of axle to hooking point. No part of draw bar may extend rearward beyond point of hook. Draw bars must be stationary in all directions. No clevises.

  5. Weights: Weights must not extend rearward beyond rear tires and cannot be more than 11 feet from the center of the rear axle to the furthest point forward.

  6. Tires & Rims: Tire size maximum 18.4 X 38 or equal size footprint. Any rim width. No radial tires. No steel lug wheels. Two wheel drive only. No duals. Any cut allowed on tires.

  7. RPM’s: Rpm’s allowed will be 120% of 1959 manufacturer’s data or 120% of that series engine: ie; F-30 Farmall can run 20% over 450 IHC RPM’s. The NATPA RPM Chart will list maximum RPM’S allowed. If 1959 manufacturer’s data is not available then the Nebraska test chart will be used. For safety purposes, any tractor turning 3000 or more RPM’s must have side shields of at least .060" metal and a scatter blanket. Enhanced electrical systems permitted in all classes. Rev limiters are allowed. All tractors must have a positive throttle stop with fully operational governor.

  8. Speed: Any gear, speed limit is 8MPH. Shifting of TA’s allowed. The 50’ marker will also be used as the mark to stop the tractor if driver wishes to restart pull. One beep after 50' will result in disqualification. NATPA of NE Four Hour Shows only will allow any gear any speed.

  9. Engine: Tractors must be naturally aspirated. No turbos or blowers - except two stroke GM diesels.

  10. Tractors must have stock frame, transmission, rear ends and axle housing. Front axles must be safe, sturdy and similar to stock with a stock wheel base. Crank cases must bolt to transmission in a stock appearing manner, be of the same manufacturer as the original crank case, must be the same length as the original crank case and be the same number of cylinders as the original make and model of the tractor. Heads, blocks (jugs), manifolds must be of the same manufacturer as the crank case or that of a recognized replacement manufacturer.

  11. Any updraft agricultural type carburetor will be allowed. Diesels must have the injection pump in the stock location. Diesel tractors may be converted to gas as long as they use gas heads and comply with all the other Division V rules.

  12. Any integral plates, girdles or reinforcement devices that enhance the engine rigidity and improve safety will be allowed. Deck plates can be no thicker than 1" material; girdles can be no thicker than 1" material; spacers plates can be no thicker than 2" combined.