Introduction
Gravely Pro Master 20-H Professional Tractor
The Gravely Pro Master 20-H is a front-mount mower tractor produced between 1989 and 1991. Part of the Gravely Pro Master series, this machine was designed specifically for landscaping and property maintenance applications requiring high maneuverability and consistent cutting performance.
Engine and Powerplant
The tractor is powered by an Onan two-cylinder gasoline engine. This air-cooled unit produces 20 hp (14.9 kW) from a 781 cc (47.7 ci) displacement. It features a 3.258x2.875 inch bore and stroke configuration, utilizing an electric starter system with 12-volt electrical architecture.
Transmission and Drivetrain
Power is delivered to the ground via an Eaton 850 hydrostatic transmission. This system provides infinite forward and reverse gears, allowing for precise speed control without shifting. The tractor utilizes a two-wheel drive system and is equipped with disc brakes to ensure reliable stopping power.
Hydraulics and Implements
To support its primary function as a mower, the Pro Master 20-H is equipped with an independent front Power Take-Off (PTO). This PTO is engaged via an electric clutch, allowing for seamless operation of the 50-inch or 60-inch mower decks compatible with this model.
Dimensions and Operator Station
The machine features an open operator station design. It measures 105 inches in length and 48 inches in height. With a base weight of 980 lbs (444 kg) when equipped with the 60-inch mower deck, it rides on 18x8.50-8 front lawn/turf tires and 4.80/4.00-8 rear tires.
Conclusion
The Gravely Pro Master 20-H is a specialized front-mount mower designed for efficient turf maintenance. Its combination of hydrostatic transmission and independent front PTO makes it a suitable tool for commercial or residential property managers prioritizing cut quality and ease of operation.
Production Information of Gravely lawn tractors, Pro Master 20-H
- Front-mount mower
| Manufacturer | Gravely (a part of Ariens) |
|---|
Dimension and Tires Information of Gravely lawn tractors, Pro Master 20-H
| Length | 105 inches [266 cm] |
|---|---|
| Height | 48 inches [121 cm] |
| Weight | 980 lbs [444 kg] |
Weight with 60-inch mower
| Lawn/turf front | 18x8.50-8 |
|---|---|
| Lawn/turf rear | 4.80/4.00-8 |
Engine Specifications of Gravely lawn tractors, Pro Master 20-H
- Onan
- Air-cooled
- Gasoline
- 2-cylinder
| Power | 20 hp [14.9 kW] |
|---|---|
| Displacement | 781 cc [47.7 ci] |
| Starter | Electric |
| Bore/Stroke | 3.258x2.875 inches [83 x 73 mm] |
| Oil capacity | 2 qts [1.9 L] |
| Starter volts | 12 |
Transmission Information of Gravely lawn tractors, Pro Master 20-H
Transmission variants 1
| Transmission | Eaton 850 |
|---|---|
| Oil capacity | 6 qts [5.7 L] |
| Type | Hydrostatic |
| Gears | Infinite forward and reverse |
Mechanical Specs of Gravely lawn tractors, Pro Master 20-H
- Two-wheel drive
- Disc brakes
- Open operator station.
Power Information of Gravely lawn tractors, Pro Master 20-H
| Front PTO | Independent |
|---|---|
| Clutch | Electric |
Electrical System of Gravely lawn tractors, Pro Master 20-H
| Ground | Negative |
|---|---|
| Battery volts | 12 |
| Charging amps | 15 (Kohler) |
| Charging amps(optional) | 20 (Onan) |
Where it sits
With 20 HP, the Gravely lawn tractors Pro Master 20-H sits between Pro Master 18-H (18 HP) and Pro Master 30-H (30 HP) in Gravely lawn tractors's range. Its power puts it in the 98th percentile of 1980s models in our database (977 machines).
Frequently asked questions
How much horsepower does the Gravely lawn tractors Pro Master 20-H have?
The Gravely lawn tractors Pro Master 20-H delivers 20 HP.
What years was the Gravely lawn tractors Pro Master 20-H produced?
The Gravely lawn tractors Pro Master 20-H was produced in 1989-1991.
What engine does the Gravely lawn tractors Pro Master 20-H have?
The Gravely lawn tractors Pro Master 20-H is powered by a Gasoline, 2-cylinder engine.
What transmission does the Gravely lawn tractors Pro Master 20-H use?
The Gravely lawn tractors Pro Master 20-H uses a Eaton 850 transmission.
How much does the Gravely lawn tractors Pro Master 20-H weigh?
The Gravely lawn tractors Pro Master 20-H weighs 980 lbs*Weight with 60-inch mower [444 kg].
Is the Gravely lawn tractors Pro Master 20-H 4WD?
The Gravely lawn tractors Pro Master 20-H is available in 2WD.