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 Hydro-Gear® is a registered trademark of Hyro-Gear Limited Partnership in the United States and / or other countries.

Hydro-Gear® transaxles parts Hydro-Gear® transmissions parts
replacement parts and complete units for Hydro-Gear® transaxles.
All units are factory new replacement not rebuilt or remanufactured.
We do not sell used Hydro-Gear® transaxles or used Hydro-Gear® transmissions.

We carry the full line of Hydro-Gear® replacement parts and rebuild parts.
For factory warranty service on your Hydro-Gear® transmission see your yellow pages for
lawn and garden equipment parts. Lawn and garden equipment repair, or small
engine repair listing.  We look forward to helping you for your Hydro-Gear® transmission needs.

HYDRO-GEAR BDP

 

The Hydro Gear pump part number BDP-21L is driven by the engine, and the motor is connected to the differential .It consists of variable volume, reversible swashplate, and axial piston pump.

The pump inlet is connected to the transmission housing, so the pump can make up for any oil that is lost. The make up oil is taken from the transmission housing through an oil filter screen. The motor speed is then controlled by the pump rpm and the angle of the swash plate, 51048.

The BDP-10A hydro gear pump turns in the same direction at all times. The pump motor is capable of turning in both directions. Reversing pump swash plate angle, which then in returns reverses the flow of oil being pumped to the motor, reverses direction of motor rotation. 

When trouble shooting your Hydro Gear Pump BDP-10L checks all the most obvious places first. For example lack of drive in one direction could be caused by: swash plate being restricted in one direction or check valve not seating. Lack of drive in both directions: drive belt slipping or breaking, oil level low, filter screen plugged, valve stuck open or leaking, or broken control linkage.

To overhaul your transmission, first remove your control arm. Unbolt oil reservoir 2003081 and then separate cover from housing. Remove check valves and pull out oil seals. Lay housing over and pull out cylinder block, 70081, and your shaft 2003020,         will slide out.

Inspect pistons and cylinder bores for any excessive damage. You can only service your pump and motor cylinder as complete assemblies. Always check your cylinder blocks for wear, scoring or scratches. Coat parts with oil during reassembly. Make sure the pistons are returned to their original bores in cylinder blocks.

 

 

HYDRO-GEAR BDU

 

The Hydro Gear pump part number BDU-21L is driven by the engine, and the motor is connected to the differential .It consists of variable volume, reversible swashplate,51048, and axial piston pump.

The BDU-10L hydro gear pump turns in the same direction at all times. The pump motor is capable of turning in both directions. Reversing pump swash plate angle, which then in returns reverses the flow of oil being pumped to the motor, reverses direction of motor rotation. 

The motor speed is controlled by the pump rpm and the angle of the swash plate. The pump inlet is connected to the transmission housing, so the pump can make up for any oil that is lost. The make up oil is taken from the transmission housing through an oil filter screen.

To overhaul your transmission, first remove your control arm. Unbolt oil reservoir and then separate cover from housing. Remove check valves and pull out oil seals, 44761. Lay housing, 2513003 over and pull out cylinder block, and your shaft 2003032, will slide out. Inspect pistons and cylinder bores for any excessive damage. Always check your cylinder blocks for wear, scoring or scratches

. When trouble shooting your Hydro Gear Pump BDU-10S checks all the most obvious places first. For example, lack of drive in both directions: drive belt slipping or breaking, oil level low, filter screen plugged, valve stuck open or leaking, or broken control linkage. lack of drive in one direction could be caused by: swash plate being restricted in one direction or check valve not seating            .

The control handle, 51680, has three positions, forward, reverse and neutral, which all effect the swash plate position. The acceleration control  and valves  protect circuits from extra pressure. They also keep the unit from jerking.

Hydro-Gear® transaxles parts Hydro-Gear® transmissions parts replacement parts and complete units for Hydro-Gear® transaxles. All units are factory new replacement not rebuilt or remanufactured. We do not sell used Hydro-Gear® transaxles or used Hydro-Gear® transmissions. We carry the full line of Hydro-Gear® replacement parts and rebuild parts. For factory warranty service on your Hydro-Gear® transmission see your yellow Pages for lawn and garden equipment parts. Lawn and garden equipment repair, or small engine repair listing. We look forward to helping you for your Hydro-Gear® transmission needs.

Hydro-Gear® transmission parts and Hydro-Gear® transaxle parts, Parts for lawn mower transmissions and lawnmower transaxles. Zero turn lawn mower transmission parts and service parts. 

Hydro-Gear® hydraulic pumps and Hydro-Gear® wheel motors  Hydro-Gear®  replacement transmissions. Hydro-Gear® replacement transaxles. transmision transaxle transaxel Parts, Hydro pumps,

Residential

Hydro-Gear residential hydrostatic transaxles are proven performers using patented technology. They provide the operator with infinitely variable control over the vehicle for better maneuverability than gear-driven transaxles. This gives the operator the confidence to take the equipment into demanding terrain. Commercial

Commercial

Hydro-Gear commercial hydrostatic solutions are built to endure the long hours and intense working conditions common in commercial turf-care and industrial applications. Special features are built in to ensure consistent top-of-the-line performance year after year. Products range from complete power transmission systems to individual components, such as piston pumps and motors.