The M+S HWS Series is a heavy duty wheel drive Geroler motor. The gear set runs rollers on the star instead of fixed lobes, so it makes more torque for the same displacement, runs cooler under continuous load and survives the side loads a wheel or sprocket puts on the shaft. It bolts straight onto a 4 bolt wheel flange with an 82.5mm centring spigot.

M+S Hydraulic has been building orbital motors in Europe since 1963. This is the frame used on zero turn mowers, mini loaders, skid steers, sweepers, conveyors and self propelled machinery of every kind.

Applications

• Zero-turn mower wheel drives, including the John Deere 700 series
• Mini loader and stand-on skid steer wheel drives
• Track drives on trenchers and stump grinders
• Self-propelled sprayers, sweepers and floor scrubbers
• Any 4-bolt wheel mount replacement running an 82.5mm spigot

Standard Supply Configuration

• 4 bolt wheel mount, 82.5mm centring spigot
• 1-1/4 inch straight keyed output shaft (K)
• 7/8 inch UNF working ports, side entry
• 7/16 inch UNF case drain
• Heavy duty tapered roller bearing head, built for wheel loads

Cross-Reference — Compatible Equivalents

Interchange verified against our own supersession records. Send us a photo of the part numbers stamped on your motor body and we will confirm the exact replacement before you buy.

Zero Turn Mowers, Mini Loaders and Wheel Drives

This frame is the common replacement for wheel drive motors on John Deere 700 series zero turn mowers (7200, 737, 7400, 757, 777, 797, 8000, 8400), Dingo and Vermeer mini loaders and similar machines. Read this before you order: the sizes in the dropdown are the keyed shaft build (K4). Many mower and mini loader drives use the 1:8 tapered shaft with lock nut build instead (for example HWS 235 R 4 for the John Deere 700 series). Same motor frame, different shaft. If your old motor has a tapered shaft, do not buy from the dropdown — call 1300 146 737 or send the enquiry form and we will quote the tapered build same day.

How to Order — Part Number Breakdown (Nomenclature)

★ = our stocked configuration. 79.7cc, 101.4cc and 753.8cc sizes exist in the HW frame but are not stocked lines — use the enquiry form and we will price them.

General Performance Data

Technician's Advice

Case drain is not optional. Every one of these motors has a 7/16 inch UNF drain on the head and it must run back to tank on its own line with almost no back pressure. Tee it into a return that sees 20 bar and you will blow the shaft seal, usually within a week. If you are replacing a motor that leaked, check the drain line before you blame the motor.

Wheel motors live or die on the bearing head. Torque the wheel bolts evenly and check the spigot seats fully in the hub — a motor hanging on the bolts alone will crack the flange. On mowers, the number one cause of a slow side is a worn motor OR a tired pump; measure case drain flow before you replace anything. More than about 1.5 L/min of case drain at working pressure means the gear set is done.

Keyed or tapered. Check the shaft before you order. Tapered shafts have a threaded end and a lock nut; keyed shafts have a parallel key. They are not interchangeable and the hub will not swap over.

Seal kits: HW-SK suits the whole HW and HWS family — see the seal kit listing below.

Warranty and Service

12-month warranty. Photograph every part number and stamped character on the motor body and send them through with your enquiry if you are identifying an existing motor.

Buy the Seal Kit for This Motor

Complete your setup

M+S MR Series Geroler MotorsM+S RL Series Geroler Motors

See How an Orbital Motor Works and Fails

Recorded in our own service workshop; we rebuild these for a living.

Shipping and Freight Information

We ship Australia-wide. Orders are dispatched from our supply network in Melbourne, Brisbane and Perth, so your parts leave from the warehouse closest to you on express freight. Because we sell solid steel components, freight costs reflect real weight and real distance. We do not hide freight costs in inflated product prices. What you see is what you pay.

• Standard parcels: 2 to 7 business days
• Heavy freight: 3 to 8 business days
• Orders placed before 12 Midday AEST ship same business day where stock is available

Why Buy From Us

• 20+ years of hydraulics expertise
• Australian owned and operated, Gold Coast QLD
• ABN 92 969 264 674
• Secure checkout: Visa, Mastercard, PayPal, Zip Pay, Direct Deposit
• Tax invoices supplied with every purchase
• Phone 07 5563 1982 or 1300 1 HOSES
• Email sales@mhfgc.com.au

Out of Stock Policy

It is our intention to maintain active stock on every listed item at all times. On rare occasions a size may be temporarily unavailable. If this occurs you will be notified immediately and offered the choice of a full refund or a short wait for incoming stock, typically 3 to 14 days.

Need help choosing? Call 1300 146 737 or email sales@mhfgc.com.au — real technicians, real answers.

Download the HWS factory datasheet (PDF)