Hydro-Gear SST — 133H-1004 (representative image) Click to zoom

Hydro-Gear 133H-1004 SST Hydrostatic Transaxle

MPN 133H-1004

Free shippingIn stockHydrostatic Transaxle

Overview

Hydro-Gear 133H-1004 is a genuine Hydro-Gear SST hydrostatic transaxle. Hydro-Gear lists the SST among its residential transaxles.

Order by the full model number on the Hydro-Gear label (133H-1004). Hydro-Gear builds each model to an OEM specification and advises against substituting a different model, so match every character.

More on this series: How to find your Hydro-Gear part number · Shop all Hydro-Gear parts

Specifications

Brand Hydro-Gear (genuine)
Model / part number 133H-1004
Series SST
Type Hydrostatic Transaxle

Service notes

  • After installing, purge air from the system following Hydro-Gear's procedure: wheels off the ground, cycle forward/reverse 5–6 times with the bypass open, then 5–6 times closed, and top up the oil.

Shipping

  • Free shipping (lower 48). Ships from distributor stock.

Frequently asked questions

Where do I find my Hydro-Gear model number?

On the Hydro-Gear label on the unit (on the transaxle). See how to find your Hydro-Gear part number.

Can I use a different model that looks the same?

Hydro-Gear strongly discourages using any model not originally specified by the mower maker; similar-looking units can differ internally. Order the exact number on your label.