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Gravely 450

Gravely 450 tractor
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The Gravely 450 is a garden tractor introduced in 1970 as part of the 400 Series. It features a 16.5 hp Onan 816cc 2-cylinder air-cooled gasoline engine, a Swiftamatic 8 shaft-driven 4-speed transmission with forward and reverse gears, and two-wheel drive with manual steering. The tractor has an open operator station and weighs 950 lbs (430 kg). It rides on 16x6.50-8 front tires and 23x8.50-12 rear tires. Attachments include 30", 40", and 50" mid-mount mower decks. Electrical system is 12 volts with negative ground. Serial numbers are located ahead of the rear axle on the left side.
Gravely 450garden tractor16.5 hpOnan engineSwiftamatic transmissionlawn tractor400 Seriesmower decks
Power16 hp
Founded30/40/50" deck
Model450

Technical Specifications

Detailed specifications and technical data for Gravely 450

Tires

Rear tire:23x8.50-12
Front tire:16x6.50-8

Engine

Type:gasoline, 2-cylinder, air-cooled
Model:Onan CCKA
Power:16.5 hp (12.3 kW)
Fuel tank:5.3 gal (20.1 L)
Rated RPM:3600
Air cleaner:dry element
Bore/Stroke:3.00x3.25 inches (76 x 83 mm)
Displacement:816 cc (49.8 ci)
Oil capacity:2 qts (1.9 L)
Sparkplug gap:0.025 inches (0.635 mm)
Starter volts:12
Intake valve clearance:0.011 inches Cold (0.279 mm)
Exhaust valve clearance:0.011 inches Cold (0.279 mm)

Dimensions

Width:41.75 inches (106 cm)
Height:43 inches (109 cm)
Length:75.5 inches (191 cm)
Shipping weight:950 lbs (430 kg)

Electrical

Ground:negative
Battery volts:12

Mechanical

Drive:Two-wheel drive
Steering:Manual steering
Operator station:Open operator station

Production

Type:Garden tractor
Series:400 Series
Manufacturer:Gravely
Year introduced:1970

Attachments

Notes:Garden tractors are capable of using tillers, plows, or other ground-engaging attachments. TractorData does not list details of these attachments.
30 inch mid-mount mower deck:30 inches (76 cm)
40 inch mid-mount mower deck:40 inches (101 cm)
50 inch mid-mount mower deck:50 inches (127 cm)

Transmission

Type:shaft-driven gear
Gears:4 forward and reverse
Model:Swiftamatic 8
Notes:Two-speed shift-on-the-move affects transmission and PTO speed. Additional two-speed range for transmission can be shifted only when stopped. Right-hand directional clutch lever controls forward and reverse.
Oil type:SAE 90W-EP
Oil capacity:5 qts (4.7 L)

Serial Numbers

Location:Ahead of rear axle on left side.

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