Toomey Earthmovers 4000B, Original Instructions Manual

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4000B USER HANDBOOK
Page 3
1 Introduction
1.1 Overview
1.1.1 Description of the Scraper
The Toomey scrapers are earthmoving machines designed to be hitched to the back of a tractor
corresponding to the size of the scraper. The scraper consists of 6 main sub-assemblies: The
drawbar (connecting scraper to tractor) the front cross beam with ripper assembly, the two side
walls, apron, the rear frame with bowl and ejector and the swing-arms with rockers and wheel
assemblies. The drawbar is connected to the front cross beam with two pivot pins and a hydraulic
cylinder connected to an accumulor to act as a form of suspension. Ripper legs are connected to
a ripper bar which is connected to the front cross beam via 4 linkages. The ripper bar is raised and
lowered via 2 hydraulic cylinders. The side walls are bolted to the flanges on each side of the
front cross beam and connected to the rear frame via two pivot pins. The apron is connected to
the side walls by pins and bearings and is activated by two hydraulic cylinders secured to the
front cross beam. A cutting blade is attached to the mouldboard in the rear frame in front of the
bowl. There are also side cutting blades mounted to the bottom of the side walls. There are two
hydraulic cylinders which connect the rear frame and the side wall and these control the height
of the cutting blade above the ground. The bowl hinges off the mouldboard and is lifted and
lowered by two hydraulic cylinders mounted to the rear frame. In the bowl is a swing door
ejector which is hinged at the top of the bowl and is operated by two hydraulic cylinders
mounted to the bowl. The right and left swing-arms are connected to the rear frame by four
pivot pins and their height is controlled by two hydraulic cylinders. The swing-arms mount the
rocker assemblies and axles which rotate with use of spherical bearings and whose rotation is
limited by stops on the swing-arms.
1.1.2 Utilisation
This design of the scraper makes it capable in a wide range of applications. The primary function
of the scraper is to shift dirt, whether it be large loads to shift bulk dirt or final trimming to get
flat paddocks or haul roads. The inclusion of rippers in the design allows the scraper to rip hard
packed, difficult to load ground without having to utilise a separate machine. The design of the
ejecting and tipping bowl allows the scraper to work in wet sticky environments and still be able
to unload when required. The large tires reduce ground pressure and allow the scraper to roll
across soft soils without leaving large trenches. The centre lift geometry and walking beam style
wheel arrangement allows the scraper to trim at greater speeds and with a superior finish.
1.1.3 Only use Genuine Parts
Always use genuine part for all repairs. The use of non-genuine parts may adversely affect the
operation of the scraper. It may also void the warranty and exclude the manufacturer of any
liability in case of accidents.
Modifications not authorised in writing by the manufacturer or importer can harm operation or
the safety of use.