Gravely GMT 900
The Gravely GMT 900 is a tractor produced by Gravely Lawn Tractors. It is equipped with a 845 cc 51.6 ci engine. The listed engine power is Gasoline (listed): 26 hp / 19.4 kW. Transmission: 8 forward and 4 reverse. Operating weight: 498 lbs 225 kg.
Engine Power
Gasoline (listed): 26 hp / 19.4 kW
Fuel & Capacities
7 gal
26.5 L
Transmission
8 forward and 4 reverse
Operating Weight
498 lbs
225 kg
Overview
 | 1977
Garden tractor |
|---|
Production | |
|---|---|
Manufacturer | Gravely |
Garden tractor | |
Gravely GMT 900 Engine | |
|---|---|
26HP Continental 845cc 4-cyl gasoline | |
Fuel tank | 7 gal
26.5 L |
Engine details ...  | |
Gravely GMT 900 Transmission | |
|---|---|
8-speed gear | |
Transmission details ...  |
Mechanical | |
|---|---|
Two-wheel drive | |
Power steering | |
Open operator station. |
Tractor hitch | |
|---|---|
Rear Type | I |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent OptOptional |
Rear PTO Type | 540 (1.375) |
Mid PTO | independent |
Mid PTO Type | 1893 |
Dimensions & Tires | |
|---|---|
Wheelbase | 63 inches
160 cm |
Weight | 1470 lbs
666 kg |
Front tire | 20x8.00-10 |
Rear tire | 29x12.00-15 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Battery volts | 12 |
References | |
|---|---|
 | |
Riding Tractors published in 1978, by Gravely |
Engine
Engine Detail — 845 cc / 51.6 ci Gasoline
Manufacturer | Continental R800-46 |
Fuel Type | Gasoline |
Configuration | 4-cylinder, liquid-cooled |
Displacement | 845 cc
51.6 ci |
Bore/Stroke | 2.28x3.14 inches
58 x 80 mm |
Power | 26 hp
19.4 kW |
Compression | 8:1 |
Rated RPM | 3200 |
Firing order | 1-3-4-2 |
Starter | electric |
Starter volts | 12 |
Oil capacity | 3.25 qts
3.1 L |
Transmission
Transmission — 8 forward and 4 reverse shaft-driven gear
Type | shaft-driven gear |
Gears | 8 forward and 4 reverse |
Dimensions
Gravely GMT 900 Tires | |
|---|---|
Lawn/turf front | 20x8.00-10 |
Lawn/turf rear | 29x12.00-15 |
Dimensions | |
|---|---|
Wheelbase | 63 inches
160 cm |
Length | 90.5 inches
229 cm |
Width | 55 inches
139 cm |
Height | 48.5 inches
123 cm |
Shipping weight | 1470 lbs
666 kg |
Attachments
72" Mower deck | |
|---|---|
Type | mid-mount Gravely |
3-blade | |
Cutting width | 72 inches
182 cm |
Weight | 498 lbs
225 kg |
Cut height | 1.75 to 5.5 inch
4 to 13 cm |
Photos
Gravely GMT 900 tractor photo
Recommended Implements & Sizing Guide
Engineering recommendations for Gravely Lawn Tractors Gravely GMT 900 based on its 26 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 1 to 2 Bottom (12")1 - 2 铧 (30 cm) | Light Duty | Ideal for garden plots and light sandy soil. |
Rotary Cutter / MowerMowing & Clearing | 5 ft (60 in)1.5 m | Medium Duty | Pasture maintenance and weeds up to 1.5" diameter. |
Rotary TillerSeedbed Prep | 54 to 60 in135 - 150 cm | Medium Duty | Thorough seedbed preparation in orchards and vegetable plots. |
Disc HarrowSecondary Tillage | 5 to 6 ft (16-18" discs)1.5 - 1.8 m (40-45 cm 耙片) | Light Duty | Small acreage soil break-up and secondary aeration. |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Gravely Lawn Tractors Gravely GMT 900.
Estimated Continuous Field Runtime: 5.2 hrs
Approximately 5.2 hours of continuous field operation at ~75% rated power on a full tank (7 gal / 26.5 L).
Estimated 75% Load Fuel Burn~1.4 gal/hr (5.1 L/hr)
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
Gravely Lawn Tractors Gravely GMT 900 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Gravely Lawn Tractors Gravely GMT 900.
Converted Equivalents:
Horsepower (HP)26 hp
Kilowatts (kW)19.4 kW
Metric Horsepower (PS / CV)26.4 PS
Direct Competitor Comparison
Compare Gravely GMT 900 against same-era industry alternatives in the same horsepower class.
Current Model
Gravely Lawn Tractors
Gravely GMT 900
Engine Power:Gasoline (listed): 26 hp / 19.4 kW
★ Baseline Reference
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