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Old 02-14-2021, 08:29 PM
sawdustdad's Avatar
sawdustdad sawdustdad is offline
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Join Date: Dec 2012
Location: USA
Posts: 2,627
Default Hydrostat issue...with video

I have a hydrostat issue I'm hoping someone will be able to diagnose. I've posted a video for you to look at, link below.

I think I need another hydrostat, but I'd like to know what is wrong with this one if anyone has any idea. I've disassembled it three times, and can find no issues other than the motor shaft has about 1/8 inch of play in/out. My thought was the motor block was not splined to the motor shaft and at some point (in the video) the splines catch. But the axial play in the motor shaft doesn't seem like it's enough to disengage the splines from the motor block.

It used to work (that is, this axle used to be driven by this hydro), but I suspect that this issue predates my ownership and perhaps has gotten worse over time to the point it no longer works at all.

I've worked on these hydros several times in the past, and successfully rebuilt/repaired a couple. I have the manual and am quite careful about keeping the valve plates, charge pump housing, etc. in correct orientation. The motor block springs are intact, the pistons, slippers, swash plates all look good and the pump and motor shafts are fine.

Here's the video

https://youtu.be/5HAjC0O2wD4
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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.

MTD Products, Inc. of Cleveland, Ohio purchased the Cub Cadet brand from International Harvester in 1981. Cub Cadet was held as a wholly owned subsidiary for many years following this acquisition, which allowed them to operate independently. Recently, MTD has taken a more aggressive role and integrated Cub Cadet into its other lines of power equipment.

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