Komatsu GD305A-3 Motor Grader Specs

Category: Motor Graders ➔
Manufacturer: Komatsu ➔
Model: GD305A-3 ➔

The Komatsu GD305A-3 Motor Grader is a powerful and reliable machine designed for optimal performance in grading operations. With a blade base of 7 ft and an engine displacement of 239.3 cu in, this grader delivers precise and efficient grading capabilities. Equipped with a 100 hp S4D102E engine and a Moldboard height of 20.9 in, this machine ensures smooth and accurate grading results. The GD305A-3 also boasts a maximum forward speed of 21.5 mph and a turning radius of 18.7 ft, making it a versatile and agile choice for grading tasks.

Dimensions

Komatsu GD305A-3 Motor Grader Dimensions specifications
Blade Base	6.94 ft (2.12 m)
Height To Top Of Isomount Cab	8.01 ft (2.44 m)
Overall Length	22.76 ft (6.94 m)
Tandem Axle Wheelbase	4.38 ft (1.34 m)
Wheelbase	16.41 ft (5.00 m)
Width Over Tires	6.89 ft (2.10 m)

Engine

Komatsu GD305A-3 Motor Grader Engine specifications
Displacement	239.30 cu in (3,921.43 cu cm)
Engine Make	2238
Engine Model	S4D102E
Max Power	100.00 hp (74.57 kw)
Net Power Gear 4-6	100.00 hp (74.57 kw)
Number Of Cylinders	4
Power Measured @	2500 rpm

Moldboard

Komatsu GD305A-3 Motor Grader Moldboard specifications
Moldboard Height	20.90 in (53.09 cm)
Moldboard Width	10.40 ft (3.17 m)

Operational

Komatsu GD305A-3 Motor Grader Operational specifications
Fuel Capacity	34.40 gal (130.20 l)
Std Operation Weight - Total	17,592.90 lbs (7,980.02 kg)
Tire Size	front 9.00-20-8PR rear 10.00-20-10PR

Steering

Komatsu GD305A-3 Motor Grader Steering specifications
Articulation Angle	27 degrees
Turning Radius	18.70 ft (5.70 m)

Transmission

Komatsu GD305A-3 Motor Grader Transmission specifications
Max Speed - Forward	21.50 mph (34.60 kph)
Max Speed - Reverse	15.30 mph (24.62 kph)
Number Of Gears - Forward	4
Number Of Gears - Reverse	1

Our Main Office

Construction Equipment Guide
470 Maryland Drive
Fort Washington, PA 19034
800-523-2200

About Us

Construction Equipment Guide covers the nation with its four regional newspapers, offering construction and industry news and information along with new and used construction equipment for sale from dealers in your area. Now we extend those services and information to the internet. Making it as easy as possible to find the news and equipment that you need and want.

Contents Copyrighted 2026, by Construction Equipment Guide, which is a Registered Trademark, registered in the U.S. Patent Office. Registration number 0957323. All rights reserved, nothing may be reprinted or reproduced (including framing) in whole or part without written permission from the publisher. All editorial material, photographs, drawings, letters, and other material will be treated as unconditionally assigned for publication and copyright purposes and are subject to Construction Equipment Guide’s unrestricted right to edit and comment editorially. Contributor articles do not necessarily reflect the policy or opinions of this publication.

Read our privacy policy here.
Mastodon