My hydrostatic pedal does not move the tractor in either direction

Hydrostatic Drive Problems?? - GardenWeb

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May 30, 2006 - Hydro-Gear Transaxle:218-3010L I got this tractor as part of the deal when I ... After spraying the heck out of it and pressing the brake pedal down several ... I pull on the handle in the back and it moves the lever but still won't move. ..... while in the air and turning the wheels with the transmission engaged? mtd lawn tractor wont pull hills
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HYDROSTATIC TRANSMISSIONS - Small Engine Information

smallengineinformation.com/?page_id=370

The drive belt may be broken, or it may have slipped off a pulley.

Assume it's a hydrostatic transmission - most probably the drive belt has come off or broken. Be sure to replace it with a Kevlar belt as changing the belt isn't easy and you don't want to have to repeat the process too soon.

this hydrostat drive tractor is designed to max at 5.5 mph forward, 2.5 in reverse, check linkage at pedal if you dont think your achieving those speeds

The riding tractor uses a hydrostatic automatic drive transmission to operate and move, which must be operated correctly in order for the vehicle to move. The automatic drive disconnect is under the driver's seat and must be in the "Drive" position in order for the tractor to move. Once you have set the automatic drive disconnect to "Drive," slowly lift your left foot up off the brake pedal and adjust the throttle control to "Fast." Slowly use your right foot to step on the speed control pedal and move the pedal forward to increase speed


Mustang Parts.
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First and cheapest thing to do is replace Fluid and filter. Sounds like filter is clogged

This symptom is cause most often by the following.

Worn and slipping drive belt which is separate from the blade/deck drive belt.(replace the belt).
by-pass lever (rod) not fully engaged (push it all the way in)
travel pedal or linkage is faulty or out of adjustment ( take to dealer)
Transaxle is faulty (take to dealer)

it's 1 of 5 likely things
The drive belt from the engine to the transaxle is totally slipping or broken
The linkage from the control pedal to the transaxle is faulty.
The transaxle is broken (not user fixable)
The by-pass rod is pulled out
The brake pedal is pushed or the linkage is stuck in the "brake" position.

Does the tractor try to move or **** in any direction, if so you may want to check to see if the disk that controls the brakes is stuck, I've seen this many times.

There is a transmission bypass lever on the back of the mower, if the bypass is moved out of the drive position, it will not drive in either direction, and will be really easy to push.