2026 John Deere Ag GM4060 

2026 John Deere Ag GM4060

Grooming Mowers

Economy, standard-duty, medium-duty or flex-wing mowers that fit your job and budget. Reinforced steel decks stand up to rugged terrain, and gearboxes are engineered for long life and quiet operation.

Compare Frontier Grooming Mowers

Frontier Grooming Mowers deliver a smooth cut for lawns, sports fields, and golf courses.

• 4 to 9 ft. (121.9 to about 279.4 cm) cutting widths
• Single- or dual-belt drive
• High blade speed for thorough cutting and uniform distribution
• Category 1 iMatch™ compatible with optional kit
• Rear discharge

Compare Frontier Flex-Wing Grooming Mowers

Go with the Flex-Wing Grooming Mowers for a quality cut over uneven fields. They feature wide working widths to make quick work at sod farms, golf courses, and parks.

• 12 to 17 ft. (3.7 – 5.2 m) cutting widths
• Rear Chain Shield
• Transport light bar (optional on FM40)
• Hydraulic wing latch release (optional)

Features may include:

Key features – GM40 Series

The GM40 series grooming mower offer a deep high-grade steel deck, premium caster wheels, and heavy-duty construction for a longer durability. The floating lower hitch, high-lift blades, and parallel side frames create an extremely even cut and an even distribution of cut material, when mowing at higher speeds. For ease of attachment, it´s iMatch™ quick-hitch ready from the factory, without additional hardware.

Combine with a 6-year gearbox warranty and a 3-year spindle warranty, operator will have a rugged, high performing, and easy to use grooming mowers.

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.

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.

High blade-tip speed

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.

Rugged component

The GM40 Series Grooming Mower rugged gearbox comes with a 6-year guarantee.

The spindles have a three-year warranty.

Easy maintenance

The shield protecting the drive belt are easy to remove without the need of a tool. This provides easy access to the belt sheaves, belt, and spring-loaded idler.

Choose from various cutting blades

To meet specific mowing needs, choose from two blade types:

• Low lift
• High lift (standard)

Deck design increases overall productivity

The deep deck design allows greater cutting volume and a cleaner cut. Offset gauge wheels reduce grass tracks.

Anti-scalping front roller kit

An anti-scalping front roller kit can be ordered as attachment for field conversion for GM40 Series Grooming Mowers. The roller is attached to the front of the cutting deck to help reduce scalping in uneven terrain.

Each kit contains one roller.

Rear chain shield conversion kit

A rear chain shield kit is available as an attachment for field conversion. It assists in preventing debris from flying out from underneath the deck of the rear-discharge grooming mowers.