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4VL Steering in reverse

V

vintagebike

Well-known member
Our 1958 Trackmaster 4VL steers and brakes just fine on snow and dirt going forward. In reverse on snow steering is poor and on dry ground it will not steer in reverse at all. Where to start?

As found in far north eastern California a few years ago
 

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Trying to figure out how to adjust the "Power Divider" on the 1950s 4VL from the Utah Scientific factory parts and service manual is proving difficult. Looks like it was written for those that already knew the process. Are there any members still around that posted about Thiokol and Trackmaster from about 2009 to 2012? Too bad Haynes never did a manual.
 

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Well, I don't know much about your application, but A series of industrial brakes rings a bell. It had a fixed anchor point on one end of the band, and the other end was the actuator. When applying brakes in the "forward" direction it caused the band to rotate toward the actuator giving a combined tightening on the drum of both the actuator and the rotation. In "reverse" the band tended to open the actuator which decreased the braking force to the point of being non-existent. The solution was a very close tolerance adjustment which the actuator could take up the slack. It was still much more responsive in the "forward" than the "reverse".
 
So it sounds like you have to pull much harder when turning in reverse? Maybe the brake bands are worn or need tightening.
 
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