Perhaps one of the most significant milestones in the evolution of the wheel loader was the introduc

2006 plug in doorbell Caterpillar 990H Wheel Loader The  wheel loader , also known as a  front end loader  or  bucket loader , is one of the most widely used machines in  construction  today and is noted for its extreme versatility and payload capacity to perform multiple tasks at a low cost. Wheel loaders are primarily used in construction applications plug in doorbell such as material handling, plug in doorbell digging, load-and-carry,  road building , and site preparation. plug in doorbell [1]  Some models even come in waste handling versions. Top manufacturers of wheel loaders by rank include  Caterpillar ,  Deere & Co. ,  Komatsu , and  Volvo . Other prominent manufacturers include  Case ,  Kawasaki , New Holland ,  Hyundai ,  JCB , and  Schaeff . [2]
Contents [ hide ] 1   History 1.1   Wheel Loader Prototypes 1.2   Rigid Frame Wheel Loaders 1.3   plug in doorbell Articulated Wheel Loaders 1.4   Front Pivot Arm 1.5   Large-sized Wheel Loaders 1.6   LeTourneau's Legacy 1.7   New Developments 2   How it Works 2.1   Specifications 3   Common Manufacturers 4   Different Names For The Same Thing 5   Additional Photos 6   Used & Unused Wheel Loaders for Sale 7   References [ edit ] History [ edit ] Wheel Loader Prototypes
In the 1920s, small  agricultural  tractors were outfitted with a loader plug in doorbell bucket for re-handling of light materials. This contraption served plug in doorbell as the earliest prototype for the modern plug in doorbell wheel loader. The earliest versions of the wheel loader were nothing more than a pivoting bucket and lift arms  mounted  on plug in doorbell a farm-type tractor. A  bucket  was mounted on a tractor  using wire ropes through a  clutch -operated  winch , and then dumped by gravity through a trip release mechanism. [3]  By the 1930s, a number of manufacturers were developing small wheel loaders by fastening buckets onto tractors. E.Boydell & Co., in Manchester England, was one of the first recorded makers of a bucket-mounted tractor with their Muir-Hill loader, a 0.5- cubic yard  (0.4 m 3 ) cable-controlled bucket mounted on a 28  horsepower plug in doorbell  Fordson Tractor. [4] [ edit ] Rigid Frame Wheel Loaders
In 1939, an engineer from Chicago by the name of Frank G. Hough developed the first self contained, two-wheel drive,  rubber  tired, loader called the Hough Model HS. [5]  The machine had a bucket capacity of 1/3 cubic yard (0.25 m 3 ). The bucket was dumped by gravity through plug in doorbell a latch mechanism. [6]
Other manufacturers began to produce integrated  four-wheel drive  wheel loaders. Many of the first wheel loaders had rigid frames. Though these machines were integrated, their rigid frames limited maneuverability resulting in the machines to turn in large circles rendering them useless plug in doorbell to operate in tight places. [7]  The first three wheel loaders developed by Caterpillar, for example, had rigid frames. Other manufacturers like Euclid/ Terex entered plug in doorbell the wheel loader market in 1957, rather late, with a small rigid frame wheel loader plug in doorbell unit known as the L-7. [8]
Perhaps one of the most significant milestones in the evolution of the wheel loader was the introduction of the  articulated  frame. Mixermobile Manufacturers in Portland, Oregon first pioneered this technology in 1953 with the Scoopmobile Model LD-5, [9]  In 1944, Hough went on to manufacture a loader with the first hydraulically actuated bucket tilt. This gave the machine the ability to control dumping and the operator could approach plug in doorbell a bank in low gear and scoop a full bucket by tilting the bucket back during loading. [10]  In 1947, Hough would advance wheel loader development once again when the company developed the world's first four-wheel drive  hydraulic  wheel loader the HM Model. [11]  The model is still considered the forerunner for the modern wheel loader.
Mixermobile Manufacturing can be credited with introducing the first wheel loaders with hydraulic motors when it developed the Model H wheel loader in 1952 and the Model HP wheel loader in 1957. These loaders had a single centrally mounted bucket arm. [12]
The Tractomotive Corp., founded by Van Dobeus, was another company to introduce the hydraulic wheel loader to the U.S. market. This involved fastening a hydraulic wheel mechanism with hydraulic power to the bucket crowd. This development transformed the wheel loader virtually from a re-handling machine to a digging machine. [13] [ edit ] Front Pivot Arm
As wheel loaders increased in size through the 1950s, concern for safety arose, particularly in the positioning of the loader arm pivot. Positioned behind the operator, the loader arms, as they moved up and down, were in close proximity plug in doorbell to the operator. This posed problems. First, the moving arms presented an accident just waiting to happen. plug in doorbell Second, the moving pa