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Old 05-04-2010, 11:12 PM
RChristensen RChristensen is offline
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Join Date: Mar 2009
Location: Gilbert AZ
Posts: 119
Default Hydro Lurch

Usually when I find a Cub that Lurches or jumps in acceleration when the springs and end pins are okay, I will find one of two problems.

1. The Trunion bracket has a notch worn in the end of the bracket.





2. The side bracket and the trunion bracket have been painted or there is rust between them that does not allow the two brackets to move independently.

3. The control linkage has worn or sloppy parts. Close and careful examination of this linkage is needed.
Replace any/all worn parts.



Whenever you move the hydro control quickly either forward or reverse the side plate responds immediately with only the small spring causing the trunion bracket to follow with a slight lag to reduce the quick change, when you reach the point of the large spring taking over it is direct movement.

If you have rust between the two brackets or someone paints the brackets they are linked together and you will not like the results, that is what the two different springs are for.

Another problem when the trunion bracket has a notch in the end the end pin will catch momentary and then snap free causing erratic operation.

Another problem, is a bent Speed Control Arm. Examine and make sure the arm is plumb and has correct geometry.



You should be able to hold the trunion bracket and move the side bracket back and forward and feel the smooth movement and the point where the big spring takes ov




Information supplied by:

Richard Christensen
Roland Bedell
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

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