CENTRAL OHIO ANTIQUE TRACTOR PULLERS ASSOCIATION
DIVISION 5 NATURALLY ASPIRATED TRACTORS
2001 RULES (updated 01/28/01)
CLASSES;
5500,6500# naturally aspirated
TIRES;
18.4 x 38 maximum , radials allowed
AGE OF DRIVER
18 years or older
AGE OF TRACTOR
1963 and older but including total run of that model. Example – IH 806
FUEL
Gasoline, Diesel, LP, Alcohol. No nitrous oxide.No mixing of fuel. Example – diesel and LP.
CYLINDER BLOCK OR CRANK CASE
Must be stock appearing for that make and model. Must be from same manufacturer and must bolt in stock location without modification. Examples: 88 Oliver may use 1800 310 engine; IH 806 may use 856 407; JD 4010 may use 4020 engine; and others to be approved by the committee.
HEADS
Cast iron heads only. Must be from same manufacturer. Example: Oliver 12 port heads; MM 800 heads. No over head cams allowed.
RPMs;
Open
DRAW BAR
Draw bars must not exceed 20 inches in height or 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 clevis
HOOD, GRILL, FRAME, TRANSMISSION, REAR END, AXLE
Must be for that make and model and must maintain stock appearance and dimension. front ends may be homemade but must maintain stock appearing wheelbase.
TOTAL LENGTH OF TRACTOR
Maximum length 12’ from center of rear axle to the furthest point forward, including weights.
MANIFOLD, CARBURETORS
Homemade manifolds allowed, carburetors must not extend through hood. Carburetor must have same number of barrels as that of the manufacturer for that make and model. No fuel injection on gas tractors. No throttle base injection. Injector pumps on diesels must be the same style and in the same location for that model.
SAFETY EQUIPMENT
Wheelie bars, kill switches, fire extinguishers, fenders, side shields, SFI flywheels and pressure plates, scatter blanket or steel shields, no steel fans
ENGINES
ALL ENGINES MUST BE 531 CUBIC INCHES OR SMALLER .
ALL COATPA GENERAL RULES APPLY
INFORMATION
Div 5 natural Chairman Larry Mouser 937-354-2063 12-6-99