i cant understand from the manual..
how the bolens multi speed thing works
Your Bolens model 235 Ride-A-Matic was a 1962 model. ......There are manuals for Ride-A-Matic tractors & attachments posted here: Ride a Matic - Manuals - Garden Tractor Talk - Forums
(In case you did not know.)
pulley on the engine is one piece, and has no moving parts.
pulley is composed of 3 parts as shown in the manual. ....The center flange slides toward either of the outer flanges, as the speed is changed. .....This is simply changing the diameter of the pulley surfaces where the two belts ride.
Since the change in pulley diameters affects the belt lengths, the pulley assembly is mounted on a hinged mounting bracket to allow the pulley to move forward or backward, as needed. .....Spring tension keeps the belts tight.
Moving the speed control handle allows the pulley assembly to move forward or backward to a certain position. .....As the pulley moves, the center flange of the pulley will move side-to-side, and the ratio of the pulley diameters will change.
When the driven
pulley moves forward (toward the engine), the center flange will increase the diameter of the pulley for the belt from the engine. .....At the same time, the diameter of the pulley where the other belt rides will become smaller in diameter. ....The speed of the tractor will decrease.
When the driven
pulley moves rearward (away from the engine), the center flange will decrease the diameter of the pulley for the belt from the engine. .....At the same time, the diameter of the pulley where the other belt rides will become larger in diameter. ....The speed of the tractor will increase.
The engine needs to be running to have the variable speed pulley operate correctly. .....With both belts removed, the center flange of the variable pulley should be free to move side-to-side. ....Rust or dirt may prevent proper operation.
When a larger pulley drives a smaller pulley, the smaller driven
pulley will always turn faster than the drive
When a smaller pulley drives a larger pulley, the larger driven
pulley will always turn slower than the drive
If both pulleys are the same diameter, both pulleys will turn at the same speed.
Edited by Bruce Dorsi, January 05, 2012 - 11:23 AM.