Author Topic: Hydrostatic  (Read 205 times)

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Offline Cut4fun

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Hydrostatic
« on: May 02, 2015, 04:11:57 pm »
Wife has been whining about how the big mower with hydrostatic transmission has been slower the last couple years  :P.  I usually wait till the drive belt wears out aka breaks till I replace.
After she used the other mower to finish her sections the other day ( aka big rider broken blade ) she really noticed it and the whine got alittle louder.  ;D

I was looking at some belts I had in the barn and came inside to look the numbers up. Dag nab if one of them didnt come back to be a brand new drive belt for the big mower.  :'(  I must have bought one in years past to have just in case it broke.
So being caught up on stuff. I pulled the deck and got to it.  :-X :-X :-X :-X :-X

Put the new drive belt on and told the wife to see what she thinks. IMO it hadnt helped any as far as speed  :-X :-\.  The other belt was showing signs of wear though.

Well I parked it and wrote it off.

I couldnt leave well enough alone so I started searching for adjustments for Hydrostatic Transmissions.

Hydrostatic Transmission Ground Speed Adjustment - Riding Mowers


NOTE:  These instructions are prepared for use by trained technicians who are experienced in the service and repair of equipment of the kind described in this publication, and are not intended for use by untrained or inexperienced individuals. Such individuals should seek the assistance of an authorized service center. Please visit our Authorized Service Center Directory to make arrangements with a service provider in your area.

Hydrostatic transmissions feature control rod linkage from the speed control lever (or foot pedal on some models) to the hydrostatic transmission. This control rod connects to the hydrostatic transmission at a regulator valve, which determines the rate of fluid flow through the transmission and the output speed to the wheels. This regulated travel limits the range of the transmission valve. These control rods are adjustable. By rotating the threaded linkage connector ferrules, the length and the resulting range of movement at the regulator valve can be altered. Please refer to the tractor Operator's Manual and associated parts diagrams for more information on the location and identification of these linkages on a particular model/style of tractor.

If the control valve is adjusted to maximum position (either forward or reverse) and the ground speed still seems slow, then the transmission may need internal service. Internal bypass valves may need to be inspected and low fluid levels, fluid contamination or clogged filters corrected to return the transmission to peak operating performance. Please visit our Authorized Service Center Directory to make arrangements with a service provider in your area to have your equipment serviced.



Did the adjustments and she  :-X :o now. Told speedy dont wreck the dang thing.  ;D :D


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Offline Cut4fun .

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Re: Hydrostatic
« Reply #1 on: May 04, 2015, 06:44:57 pm »
Guy that brought in the partner chainsaw. Was complaining of his hydrostatic slowing up over the years. 

I just smiled.  Told him get his model number and go to makers website for info the way I learned.  I also told him about the above I found on mine on how to do it.
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