CENTRAL OHIO ANTIQUE TRACTOR PULLERS ASSOCIATION
DIV 4 RULES 2008

CLASSES
3500, 6000, 6500, 8000, 9000                                                                                                                                                                                 AGE OF DRIVER                                                                                                                                                                                            Drivers must be 14 years of age or older. Those under 18 years of age must have written parental/guardian permission.                                                                                                                                                                                                                                                    AGE OF TRACTOR                                                                                                              Open                                                                                                                                                                                                                   DRAW BARS                                                                                                                                                                                                       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                                                                                                                                                                              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. No more then 12" from side of rear tire.                                                 TIRES                                                                                                                                                                                                                     Radial tires allowed, two-wheel drive only, no duels, any cut allowed on tires. Manufactured data must be intact. Tire size will be 18.4x38 Maximum footprint per Firestone tire chart D170, 270 sq. in. Any rim width.                                                                                                      FUEL                                                                                                                                                                                                                         Gas, diesel or LP fuels only. No alcohol or nitrous oxide fuels may be used in tractors. Gas is allowed a maximum of 750 specific gravity. All tractors are subject to random fuel checks. Tractors manufactured to use diesel fuel only cannot be converted to gas or LP.                                       RPM’S                                                                                                                                                                                                                    Rpm’s allowed will be determined by the Nebraska test chart. Any tractor not listed will use manufacturer’s data. A 20% margin of error will be permitted with a maximum 2500 rpm. All tractors to have positive throttle stops.                                                                                                                    SPEED LIMIT                                                                                                                                                                                                           (7 mph), Shifting of TA’s allowed.             CARBURETORS                                                                                                                                                                                                   Any agricultural tractor or combine carburetor allowed. No air plane carburetors. Number of barrels, throats, venture, etc, must be that of the manufacturer for that make and model. Interior enhancement of stock or manufacturer’s replacement manifolds permitted. Enhanced electrical systems permitted in all classes. No rev limiters. Injector pumps must be stock or manufacture’s replacement for make and model. Turbos are allowed on all tractors.       ENGINE , FRAMES , TRANSMISSION , REAR END , AXLE                                                                                                    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. Dual exhaust not allowed except after stock manifold.                                                                     OTHER RESTRICTIONS                                                                                                                                                                               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 33, Oliver 77, JD-A 1939 and down and like size tractors are not allowed in classes below 4000#.                                                                        SAFETY EQUIPMENT                                                                                                                                                                                      Wheelie bars, kill switches, no steel fans, all electric fuel pumps must be wired to the kill switch.

ALL COATPA GENERAL RULES APPLY, Jon Cronkleton  937-355-6041

                                                                                             1-1-08