Gravely lawn tractors 8129
Power
12 hp
Production
1980
Engine
1-cylinder
Transmission
Shaft-driven gear
Weight
890 lbs [403 kg]
Drive
2WD
From the same series:
Introduction
Gravely 8129 Garden Tractor
The Gravely 8129 is a garden tractor produced around 1980, designed primarily for residential property maintenance and light horticultural tasks. It belongs to the 8100 series, which includes models such as the 8128, 8169, and 8127, reflecting the manufacturer's focus on compact, versatile machinery for non-commercial agricultural applications.
Engine and Power
The tractor is powered by a 12 hp (8.9 kW) single-cylinder, air-cooled engine with a horizontal shaft. It features a displacement of 476 cc (29.07 ci) and a bore-to-stroke ratio of 86 x 83 mm. The engine relies on a 12-volt electric starter system to facilitate operation.
Transmission and Drivetrain
The 8129 utilizes a shaft-driven gear transmission providing 8 forward and 4 reverse speeds. The system is organized into two ranges (low and high), with four gears available in each. Gear and range selection requires the use of forward/reverse clutches, and the directional clutch must be set to neutral to safely shift between gears.
Hydraulics and PTO
The machine is equipped with an open-center hydraulic system operating at a pressure of 1200 psi (82.7 bar), delivering a pump flow of 1.7 gpm (6.4 lpm). It features an independent mid-mounted PTO with a mechanical clutch, designed to operate at 1000 rpm, allowing for the connection of mid-mounted implements.
Mechanical and Dimensions
Built with a two-wheel drive configuration, the tractor features manual steering and mechanical band brakes. Its compact design includes a 52-inch (132 cm) wheelbase, a total length of 79.5 inches (201 cm), and a width of 36.4 inches (92 cm). The unit has a shipping weight of 890 lbs (403 kg) and provides 7 inches (17 cm) of ground clearance. It is fitted with turf tires sized 16x6.50-8 on the front and 23x8.50-12 on the rear.
Conclusion
The Gravely 8129 is a durable, utility-focused garden tractor. Its combination of a gear-driven transmission, independent mid-PTO, and compact dimensions makes it well-suited for owners requiring a maneuverable machine for mowing and basic garden maintenance tasks.
Production Information of Gravely lawn tractors, 8129
- Garden tractor
| Manufacturer | Gravely |
|---|
Dimension and Tires Information of Gravely lawn tractors, 8129
| Wheelbase | 52 inches [132 cm] |
|---|---|
| Shipping weight | 890 lbs [403 kg] |
| Height | 43 inches [109 cm] |
| Length | 79.5 inches [201 cm] |
| Ground clearance | 7 inches [17 cm] |
| Width | 36.4 inches [92 cm] |
| Lawn/turf front | 16x6.50-8 |
|---|---|
| Lawn/turf rear | 23x8.50-12 |
Engine Specifications of Gravely lawn tractors, 8129
- Air-cooled horizontal-shaft
- Image courtesy of Todd Jones
- 1-cylinder
| Power | 12 hp [8.9 kW] |
|---|---|
| Displacement | 476 cc [29.07 ci] |
| Starter | Electric |
| Bore/Stroke | 3.375x3.25 inches [86 x 83 mm] |
| Starter volts | 12 |
Transmission Information of Gravely lawn tractors, 8129
Transmission variants 1
- Four gears (1-4) in two ranges (low-high) with forward/reverse clutches. The directional clutch must be in neutral to shift gears or ranges.
| Type | Shaft-driven gear |
|---|---|
| Gears | 8 forward and 4 reverse |
Mechanical Specs of Gravely lawn tractors, 8129
- Two-wheel drive
- Open operator station.
- Manual steering
- Mechanical band brakes
Power Information of Gravely lawn tractors, 8129
| Mid PTO | Independent |
|---|---|
| Clutch | Mechanical |
| Mid PTO Type | 1000 |
Hydraulics Specifications of Gravely lawn tractors, 8129
| Type | Open center |
|---|---|
| Pressure | 1200 psi [82.7 bar] |
| Pump flow | 1.7 gpm [6.4 lpm] |
Electrical System of Gravely lawn tractors, 8129
| Ground | Negative |
|---|---|
| Battery volts | 12 |
| Battery AH | 42 |
Where it sits
With 12 HP, the Gravely lawn tractors 8129 sits just below 8169 (16 HP) in Gravely lawn tractors's range. Its power puts it in the 56th percentile of 1980s models in our database (977 machines).
Frequently asked questions
How much horsepower does the Gravely lawn tractors 8129 have?
The Gravely lawn tractors 8129 delivers 12 HP.
What years was the Gravely lawn tractors 8129 produced?
The Gravely lawn tractors 8129 was produced in 1980.
What engine does the Gravely lawn tractors 8129 have?
The Gravely lawn tractors 8129 is powered by a 1-cylinder engine.
What transmission does the Gravely lawn tractors 8129 use?
The Gravely lawn tractors 8129 uses a Shaft-driven gear transmission.
How much does the Gravely lawn tractors 8129 weigh?
The Gravely lawn tractors 8129 weighs 890 lbs [403 kg].
Is the Gravely lawn tractors 8129 4WD?
The Gravely lawn tractors 8129 is available in 2WD.