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John Deere
GM4072
Grooming Mowers

John Deere GM4072

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Floating top and lower hitch for level cutting

The floating top link on the GM40 Series keeps the deck tracking over ground contours for a level and smooth cut. For increased cut quality, connect your tractor’s 3-point hitch to the mower without an iMatch™ hitch system, taking advantage of the side-to-side floating clevis brackets.

Studio side view of a GM40 series grooming mower and its floating top and lower hitch
Adjustable Caster Wheels

By having four height adjustable caster wheels, the GM40 Series Grooming Mower follows ground contours and prevents scalping for even cut quality. Heavy tubular caster wheel arms are bolted to rail supports for long life.

Green grooming mower shown from the side, featuring caster wheels, a PTO driveline, and a rectangular mower deck
High Blade-Tip Speed for Better Mowing Quality

High blade tip speeds allow for better mowing quality at higher operating speeds and precise blade overlap work together to ensure performance and a quality cut.

Computer-generated graphic of the underside of a GM40 series grooming mower's deck with three blades
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Dimensions
Overall Machine Width

73 in.

Overall Machine Width

185.7 cm

Cutting Width

72 in.

Cutting Width

182.9 cm

Weight
Operational

686 lb.

Operational

311 kg

Shipping

779 lb.

Shipping

353 kg

Tractor Requirements
PTO Horsepower

20-50 hp

PTO Horsepower

14.9-37.2 kW

PTO rpm

540 rpm

Hitch
Hitch Category

Category 1

Deck
Deck Thickness

7 gauge

Deck Discharge

Rear

Blade
Average Tip Speed

18100 fpm

Average Tip Speed

5486.4 m/min

Spindles - Quantity

3

Spindles - Composition

Ductile iron

Spindles - Bearing

Triple ball bearings

Caster Wheels
Quantity

4

Solid Caster Wheels

Yes

Solid Caster Wheels - Size

4.0x10.0 in.

Solid Caster Wheels - Size

10.1x25.4 cm

Belts
Quantity

1

Adjustment

Spring-loaded w/ bearing pivot

Setup Time
Labor Hours

0.5 hr

Warranty
Machine

1 year

Gearbox

6 year

Spindle

3 year