John Deere Z850A
Power
31 hp
Production
2008-2009
Transmission
Hydrostatic
Weight
1360 lbs (60 inch) [616 kg]
Drive
2WD
From the same series:
Introduction
John Deere Z850A Zero-Turn Mower
The John Deere Z850A is a professional-grade zero-turn mower produced between 2008 and 2009 in Fuquay-Varina, North Carolina, USA. It is designed for high-efficiency turf maintenance, belonging to a series that also includes the Z840A and Z860A models.
Engine and Performance
The tractor is powered by an air-cooled, vertical-shaft V-Twin engine with a displacement of 852 cc. It delivers a gross power output of 31 hp (23.1 kW). The engine features a compression ratio of 8.2:1 and utilizes a dry-type air cleaner. Maintenance intervals for oil changes are set at 100 hours, with an oil capacity of 2.0 quarts (1.9 L).
Transmission and Drive
The Z850A utilizes a hydrostatic transmission, providing infinite forward and reverse speed control. The system is maintained using Hy-Gard (J20D) oil, with a service interval of 500 hours and a total capacity of 2.9 quarts (2.7 L). The mower is configured with two-wheel drive and is equipped with power steering to assist in maneuverability.
Mowing and PTO
The machine features an independent mid-mounted PTO operated by an electromagnetic clutch. It is compatible with 60-inch or 72-inch mower decks, allowing for significant coverage. The specific tire configuration consists of 13x6.5-6 front tires and 24x12-12 rear tires designed for lawn and turf applications.
Electrical and Chassis
The electrical system is 12-volt, supported by a battery with 300 Cold Cranking Amps (CCA) and a 15-amp charging system. The chassis is equipped with a two-post folding Roll-Over Protective Structure (ROPS) for operator safety. Depending on the deck size, the machine weighs between 1360 lbs (616 kg) for the 60-inch model and 1439 lbs (652 kg) for the 72-inch model.
Conclusion
The John Deere Z850A is engineered for professional landscaping tasks requiring high maneuverability and consistent cutting performance. Its robust construction, combined with a powerful V-Twin engine and hydrostatic drive, positions it as a reliable tool for large-scale turf management.
Production Information of John Deere, Z850A
- Zero-turn mower
- Built in Fuquay-Varina, North Carolina, USA
| Manufacturer | John Deere |
|---|
Dimension and Tires Information of John Deere, Z850A
| Wheelbase | 55 inches [139 cm] |
|---|---|
| Weight | 1360 lbs (60 inch) [616 kg] |
| Height (Folded ROPS) | 47 inches [119 cm] |
| Length | 85 inches [215 cm] |
| Length(optional) | 1439 lbs (72 inch) [652 kg] |
| Height (ROPS) | 73 inches [185 cm] |
| Lawn/turf front | 13x6.5-6 |
|---|---|
| Lawn/turf rear | 24x12-12 |
Engine Specifications of John Deere, Z850A
- Air-cooled vertical-shaft V-Twin
| Exhaust valve clearance | 0.005 inches [0.127 mm] |
|---|---|
| Intake valve clearance | 0.005 inches [0.127 mm] |
| Air cleaner | Dry |
| Oil change | 100 h |
| Starter | Electric |
| Idle RPM | 1700-3600 |
| Displacement | 852 cc [52 ci] |
| Oil capacity | 2.0 qts [1.9 L] |
| Power (gross) | 31 hp [23.1 kW] |
| Compression | 8.2:1 |
| Bore/Stroke | 3.33x3.00 inches [85 x 76 mm] |
| Point gap | 0.012 inches [0.305 mm] |
| Sparkplug gap | 0.030 inches [0.762 mm] |
| Starter volts | 12 |
Transmission Information of John Deere, Z850A
Transmission variants 1
| Type | Hydrostatic |
|---|---|
| Type(optional) | Hy-Gard |
| Oil type | Hy-Gard (J20D) |
| Gears | Infinite forward and reverse |
| Oil change | 500 h |
| Oil capacity | 2.9 qts [2.7 L] |
Mechanical Specs of John Deere, Z850A
- Two-wheel drive
- Power steering
- Two-post folding ROPS.
Power Information of John Deere, Z850A
| Mid PTO | Independent |
|---|---|
| Clutch | Electo-magnetic |
Electrical System of John Deere, Z850A
| Ground | Negative |
|---|---|
| Battery Group | U1L |
| Battery volts | 12 |
| Charging amps | 15 |
| Battery CCA | 300 |
Where it sits
With 31 HP, the John Deere Z850A sits between Z840A (26 HP) and Z860A (34 HP) in John Deere's range. Its power puts it in the 99th percentile of 2000s models in our database (1174 machines).
Frequently asked questions
How much horsepower does the John Deere Z850A have?
The John Deere Z850A delivers 31 HP.
What years was the John Deere Z850A produced?
The John Deere Z850A was produced in 2008-2009.
What transmission does the John Deere Z850A use?
The John Deere Z850A uses a Hydrostatic transmission.
How much does the John Deere Z850A weigh?
The John Deere Z850A weighs 1360 lbs (60 inch) [616 kg].
Is the John Deere Z850A 4WD?
The John Deere Z850A is available in 2WD.