Age: Drivers must be 14 years of age or older. Those under
18 years of age must have written parental/guardian permission.
Safety: All tractors must have a working safety kill
Draw Bar: Draw bars 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.
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
Tires and Rims: Maximum tire size - 18.4 X 38; any rim
width. No radial tires. No steel wheels. Two wheel drive only. No duals. Any cut
allowed on tires.
RPM’s: RPM’s allowed will be determined by the NATPA RPM
Chart. Any tractor not listed will use manufacturer’s data. A 10% margin of
error will be permitted. All tractors to have positive throttle stops with a
working governor in the stock location.
Speed: Any gear, speed limit is 3.5 MPH No shifting of TA’s. One beep after flag/cone will result in
disqualification. The marker for Div III speed will also be used as the mark to
stop the tractor if driver wishes to restart pull. NATPA
of NE Four Hour Shows only will use a speed limit of 4 MPH and
shifting of TA's will be allowed.
Tractors manufactured to use diesel fuel only cannot be
converted to gas or LP. Tractors must be naturally aspirated. No turbos or
blowers - except Oliver 99GM, etc.
Tractors must have the stock engine, frames, transmission,
rear end and axle housings or manufacturer’s replacement. Stock heads and their
replacements are to remain unchanged in outside appearance. No 7 bolt main
blocks in Olivers; no (12) port heads; no 99 heads; no 1600 series heads. AC -
WC/WD/WD45 can use D-17 engine; IH - H, 350; M, 450. JD - A/B/G can use power
blocks. No M-M 800 heads or blocks. Dual exhaust not allowed except after stock
Enhanced electrical systems permitted in all classes. No
rev limiters allowed.
Replacement carburetors with no modification of carburetor
or manifold. Overhang of carburetor to manifold is not allowed. Only stock
appearing manifolds are allowed.
No increased height in any tractors (ie: deck plates,
shims, girdles) except for stock gasket.
OL 66,Farmall H, AC WC, Ford 800 and above and like size
tractors are not allowed in classes below 3500#. Massey 33, Oliver 77, JD-A 1939
and down and like size tractors are not allowed in classes below 4000#. Oliver
88, Farmall M, Massey 44, MM-U, JD-G, Case-C/D, JD-A 1940 and up and like size
tractors are not allowed in classes below 4500#. Massey 55, IH W-9, IH WK-40,
Case LA, Case 600, Moline GB, Moline GBD, Oliver 99 and all like size tractors
are not allowed below 5500#.