Hydro-Gear ZT-4400 — 1710-1076L (representative image) Click to zoom

Hydro-Gear 1710-1076L ZT-4400 Hydrostatic Transaxle (LH)

MPN 1710-1076L

Replaces Ferris 84008730; Ferris 5107881

Free shippingIn stockHydrostatic Transaxle

Overview

Hydro-Gear 1710-1076L is a genuine Hydro-Gear ZT-4400 hydrostatic transaxle, left-hand (LH). The ZT-4400 is a Hydro-Gear commercial integrated transaxle "rated for machines up to 1800 lbs."

Order by the full model number on the Hydro-Gear label (1710-1076L). Hydro-Gear builds each model to an OEM specification and advises against substituting a different model, so match every character; zero-turns use a left and a right unit — check which side you need.

Replaces / cross-reference: Ferris 84008730; Ferris 5107881. Confirm against your mower's parts list.

More on this series: Hydro-Gear ZT-4400 & ZT-5400 guide · Shop all ZT-4400 & ZT-5400 transaxles

Fits these mowers

Brand Model
Ferris SRS Z3X

Used as a pair with 1710-1076R on Ferris SRS Z3X — check your label for which side you have.

Fitment from Hydro-Gear's cross-reference. Always confirm the number on your unit's label before ordering.

Specifications

Brand Hydro-Gear (genuine)
Model / part number 1710-1076L
Series ZT-4400
Type Hydrostatic Transaxle
Side Left-hand (LH)
Pump / motor displacement 12 cc/rev pump, 16 cc motor (series spec)
Input speed 3600 rpm max (no load), 1800 rpm min (loaded) (series spec)
Output torque (up to) 575 lb-ft (780 Nm) (series spec)
Speed (up to) 12 mph (series spec)
Max machine weight 1800 lb (816 kg) gross vehicle weight (series spec)
Axle 1.375 in (35 mm); tapered, 4-bolt or 5-bolt flange (series spec)
Unit weight 55 lb (25 kg) (series spec)
Parking brake Internal disc (series spec)
Fluid 20W50 engine oil; 117–120 fl oz (3450–3550 ml) (series spec)
Filter Hydro-Gear 72537 (25 micron nominal / 40 absolute)

Service notes

  • Oil and filter: 20W50 engine oil (biodegradable oils are not approved) and Hydro-Gear filter 72537. First change at 100 hours, then every 400 hours or yearly, whichever comes first.
  • Hydro-Gear's oil service kit 72881 covers the ZT-4400 and ZT-5400.
  • 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). Current numbers look like 1710-1066R. 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.