Specifications

Blades

Number Three
Thickness 0.25 in.
0.64 cm
Blade tip speed Approximately 18,000 fpm
5486 m/min

Brakes

Park brake Internal wet disk
Dynamic braking Dual hand-controlled levers
Park brake actuation Hand lever

Buyer's note

Warranty 36 months or 1200 hours, whichever comes first.
First 24 months, no hour limitation.

Dimensions

Weight 1095 lb
497 kg (54 in.)
1120 lb
508 kg (60 in.)
Height 48 in.
122 cm
Width With chute down, 68, 74 in.
173, 188 cm
Length Foot platform up, 67.25 in.
171 cm
Foot platform down, 72 in.
183 cm

Drivetrain

Hydraulic pumps 0.79 cu in.
13 cc
Wheel motors 13 cu in.
213 cc
Filter Two internal and replaceable
Travel speed Speed range
0-10 mph
0-16.1 km/h
Forward
Infinite, 0-10 mph
Infinite, 0-16.1 km/h
Reverse
Infinite, 0-5 mph
Infinite, 0-8.0 km/h
Hydraulic oil cooler Two 8.5 in. (22 cm) fans
Transmission Tuff Torq TZT13 IHT
Speed and direction control Twin hand-controlled levers
Hydraulic capacity 6.0 U.S qt
5.7 L

Electrical system

Operator presence starting system Yes
Battery voltage 12 V
Charge system At 3,600 rpm 20A
Hour meter Display panel including hour meter, fuel level, engine speed, system voltage, low engine oil pressure indicator, starting interlock indicators (PTO, operator presence, park brake), caution warning, stop warning, and on-board diagnostics
Cold cranking amp 300 CCA

Engine

Lubrication Full pressure
Air cleaner Heavy-duty canister type with safety element
Cooling Forced air, with integrated clean out ports and oil cooler
Displacement 52.0 cu in.
852 cc
Manufacturer/Model FX850V
Cylinders Two, V-twin
Oil filter Full flow, replaceable
Power Gross at 3,600 rpm: 27 hp
20.1 kW
Crankcase capacity With filter, 2.4 qt
2.3 L

Fuel system

Fuel tank switch/shut-off valve No
Fuel type Gasoline
Fuel tank capacity 12 U.S. gal.
45.3 L

Key Specs

Caster wheels 13x5-6
Engine Manufacturer/model FX850V
Mower deck size 54-in. (137-cm) 7Iron™ PRO side-discharge
60-in. (152-cm) 7Iron™ PRO side-discharge
Speed range 0-10 mph
0-16.1 km/h
Engine power Gross at 3,600 rpm: 27 hp
20.1 kW
Warranty 36 months or 1200 hours, whichever comes first.
First 24 months, no hour limitation.
Blade tip speed Approximately 18,000 fpm
5486 m/min
Fuel tank capacity 12 U.S. gal.
45.3 L
Transmission Tuff Torq TZT13 IHT
Drive wheels 22x12-12 pneumatic
22x11N12 Tweel

Mower decks

Deck construction 7-Iron™ PRO: one-piece forged steel
Discharge Side
Size 54-in. (137-cm) 7Iron™ PRO side-discharge
60-in. (152-cm) 7Iron™ PRO side-discharge
Cutting width 54-in. (137-cm) 7Iron™ PRO side-discharge
60-in. (152-cm) 7Iron™ PRO side-discharge
Deck thickness 7 gauge
0.180 in.
4.6 mm
Height-of-cut range Increments
0.25 in.
0.64 cm
1.5-5 in.
3.8-12.7 cm

PTO

Type Electro-magnetic with brake, 200 lb-ft
271 Nm
Drive V-belt

Tires

Drive wheels 22x12-12 pneumatic
22x11N12 Tweel
Load rating 4 PR

Wheels

Caster wheels 13x5-6
Front anti-scalp rollers RH, center, LH
Caster wheel type Flat free

Additional information

Date collected 28-Aug-2023

John Deere Q850M Image Gallery