More then eighty years ago, Caterpillar introduced the industry's first true motor grader, the Caterpillar Auto Patrol.
After purchasing the Russell Grader Manufacturing Company of Minneapolis in 1928 and adding Russell's blade graders and motor patrols to the Caterpillar product line, the Caterpillar Auto Patrol first appeared on the market in April 1931.
Key, innovative features of this machine included rubber wheels for higher speed, the placement of the engine behind the operator to improve visibility, a rear-mounted cab to improve balance and the drivetrain and grader designed as a single unit.
Weighing 14,000 pounds, the Auto Patrol was 21 feet long and over 7 feet wide. A 35-horsepower Caterpillar gasoline engine with four forward speeds and one reverse speed powered the early motor grader. Five forward-and-reverse clutch levers controlled the operation of the 12-foot blade and optional scarifier attachment.
The price for a new Auto Patrol in 1931 was $3,100.
80 years of innovation
Eight decades of innovation have brought tremendous technological advances evident in Caterpillar's Motor Grader product line today.
Perhaps the greatest innovation was the 2007 revolutionary introduction of joystick controls in the M Series Motor Graders for steering and operating. Not only do the joysticks reduce overall operator movement by 78 percent, lessening fatigue for a more productive and focused operator, the move from mechanical to electro hydraulic controls also freed up significant space in the cab, allowing for a complete redesign with more comfort and visibility for the operator.
M Series 2 Motor Graders continue to offer the outstanding productivity, visibility and operator comfort as the M Series, as well as a Cat engine and aftertreatment solution that meets U.S. EPA Tier 4 Interim/EU Stage IIIB emissions standards.
Eighty years after the Caterpillar Auto Patrol appeared on the market, Caterpillar continues to design and manufacture state-of-the-art machines with customers in mind, helping them work more efficiently, with more uptime at the lowest owning and operating cost.
1931 - The Caterpillar Auto Patrol, the industry's first true motor grader, appears on the market.
1933 - Tandem tires create more stability and a more consistent blade level on uneven ground.
1934 - Caterpillar introduces a Cat diesel-powered motor grader.
1939 - The term "motor grader" is used in the product name for the first time.
1963 - The No. 16 Motor Grader was the largest machine of its kind, weighing in at 46,500 lbs (21 092 kg).
1973 - The six-model G Series features the advantages of an articulated frame.
1995 - The H Series, with a comfortable cab, an electronically controlled transmission and all wheel drive capability, replaces the G Series.
1996 - Caterpillar introduces the 24H Motor Grader, measuring 14 feet tall and 51feet long, and weighing 130, 902 lbs.
2007 - Joystick controls in the M Series Motor Graders reduce operator movement by 78 percent, increasing productivity.
Caterpillar Motor Graders continue their reputation for offering world-class cab and controls, advanced electronics and hydraulics, and optimum productivity to match your needs in any application.