Hydro gear hydrostatic drive simplicity

[Anonymous-0]

know this may be off topic, but I also know that there are no smarter people in the world than those that read these pages. Since I am looking for information on a mechanical component, it may be of interest to some.

I recently bought a (new to me) Simplicity broadmood 1995 mower. The wife has given me much heat about it cause it will not climb a hill. I changed the oil in the hydro unit and it is more quiet, but still is slipping internally. It is a hydro gear 311-0750 unit. There is no drain so I sucked the fluid out and refilled. I can dis assemble anything and if I spot a problem, I can secure parts and repair. I can not afford to get a rebuilt unit. if there is anyone with experience with this type of unit, I would be grateful for any advice or guidance on how to repair this unit.

I have searched the net for days and have not found anything other than a parts list.

Does anyone here have advice on saving face with my family?

Thanks for any advice you may have.

 

[PSU4250]

I assume you understand how that transmission works? Two axial piston pump/ motor. You have a fixed displacement motor and a variable displacement pump. You probably have worn pistons and cylinder blocks. Does the condition get worse when it warms up?

 

[veggiesmn]

I bought the same kind of mower at an auction, and it had the same problem. I got a used one from an mtd or a murray mower and swapped some linkage parts. It bolted right up, works well and was only a hundred busks. Found it on craigs list. good luck

 

[TheOldHokie]

(quoted from post at 23:19:57 06/18/10) I assume you understand how that transmission works? Two axial piston pump/ motor. You have a fixed displacement motor and a variable displacement pump. You probably have worn pistons and cylinder blocks. Does the condition get worse when it warms up?

The Hydro-Gear 311-0750 is an older integrated transaxle drive - pumps and motor in a unitized case. Looks to be obsolete and parts may be hard to find. It is my understanding that for the transaxle units repair is usually a unit rather than component replacement. Contact Hydro-Gear directly for a definitive answer. My guess is they tell you to drop in a newer model that has superceded it.

TOH

 

[Anonymous-0]

The condition does get worse as it heats up. I guess it is time to spill its guts. Thanks for the help.

I currently do not understand how the unit works, but I will.

If I let not understanding how something works stop me, I would never learn.

 

[ZANE]

Be sure the belt is not slipping.

I bought a nearly new 24 HP Sears last year for $200 because it would not push the big owner up a hill. I put a stronger spring on the clutch pedal and now it will climb a tree.

Zane