Toomey Earthmovers 4500B, Руководство пользователя

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4500B USER HANDBOOK
Page 35
5.3 Unloading
The Toomey scraper incorporates a dual action ejection method. This is controlled hydraulically
by a sequencing valve which means only a single operator control is required to control the
ejection of material from the bowl.
To commence unloading, open the apron. This will allow material to start falling out of the
machine. The stickiness of the material will determine how much the machine empties. After the
material has fallen out due to opening the apron, the bowl tipping can be activated. The tipping
action will eject more material as the bowl inclines past the angle of repose until it reaches the
limit of tipping. Once this limit has been reached the ejector will activate and positively eject any
product still remaining in the bowl. This is ideal for sticky clays as it leaves very little material left
in the bowl which increases efficiency.
Once the product has been emptied from the machine, return the bowl to its lowered position
my activating the control lever in the opposite direction. The ejector will retract and the bowl will
lower in sequence automatically. Always travel with the bowl in the lowered position to reduce
wear on the bowl cylinders and pins. It is recommended to also travel with the apron in the
closed or partially closed position.
The diagram below shows the material contact faces in the ejected position. As you can see there
are minimal surfaces for sticky material to cling.
Figure 5.2 Material Contact Surface
5.4
Operating Conditions
Avoid operating the machine on slopes exceeding 20%. If operating on sloping ground keep the
scraper as low to the ground as possible to keep the centre of gravity low and avoid tipping.
The operator should be ready at all times to lower the scraper to the ground to slow or stop the
tractor in case of emergency.