Prevents damage | Bull-Pull hitch creates positive mechanical connection
FARGO, N.D. — If a chain is only as strong as its weakest link, then the hookup between a tractor and its implement is only as strong as the drawbar and hitch.
Butch Kraska, a rep for Terog Manufacturing in Stephen, Minnesota, says using a conventional pin for the hookup and a loose fitting steel ring for the hitch means every jarring bump and backlash hit can weaken the components and potentially cause separation of tractor and implement.
Kraska said a sloppy relationship between the drawbar and implement creates a lot of stress and fatigue on the equipment and operator.
A positive mechanical connection between tractor and implement can avoid this problem, he added.
“The Bull-Pull Articulating Hitch eliminates the slap and backlash you normally have going on between the tractor and any implement you happen to be pulling,” Kraska said.
Terog engineers determined that a common ball joint, sometimes called a rose joint or heim joint, can replace the conventional hitch. The heim joint allows no free play or slop but does allow 35 degrees fore/aft movement and 40 degrees lateral movement.
“Unless you’re going to drive straight up a cliff, that gives you all the movement you’ll ever need, even in the roughest field,” said Kraska.
“With an articulating hitch, the pin no longer takes the brunt of the abuse. The forces are absorbed and controlled by the ball in the socket. It swivels and turns to eliminate the shock.”
Kraska said there are 10 Bull-Pull models in categories 4 and 5. Pin size runs from 1.5 inch to 2.75 inch. Adaptor sleeves are available to cover all pin size combinations. The parts list includes nearly all implements on the market.
Installation involves removing the original hitch and bolting the Bull-Pull into the same spot.
Kraska said Terog has had the hitches tested, with impressive results.
“For example, our two-bolt Category 4 hitch is good for a maximum tongue load of 18,000 pounds with a safety factor of three. So actual max tongue weight is 54,000 lb.,” he said.
“For pulling force, it’s good for 52,000 lb. with a safety factor of three, so that’s good for an actual pulling force over 150,000 lb. I don’t think any other hitch can make those claims.”
The body of the hitch is ductile cast iron, and the ball and socket are austempered, which is a heat treating process that reduces distortion in ductile iron. The ball is heat treated. The bushing is steel. The body has two grease zerks that feed into a groove around the ball. The daily lubrication pushes fresh grease to the ball.
Prices start at $345 for some Category 4 hitches. Most Category 5 hitches are less than $400. One special hitch, designed to fit John Deere Bauer corn planters, sells for $545.
For more information, contact Kraska at 218-478-3395 or visit www.terog.com.