Bartell CONTEC ELEPHANT, Owner'S Manual And Parts Book

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ELEPHANT SHOT BLASTER
OWNER’S MANUAL
11
OIPB
– C
After a few meters of blasting close the shot valve and stop the machine. Check the track on
the floor. If the track is not evenly blasted, adjust the position of the shot cage as described in
the
“Adjusting the Blast Track” Section.
The dust container of the Dust Collector must be emptied on a regular basis. The intervals
depend on the size of the container and on the condition of the floor.
ADJUSTING THE BLAST TRACK
The blasting path is adjusted by turning the shot cage in the blast chamber. If blasting leaves
an uneven path, then one side of the path is being blasted more heavily than the other.
Remove the shot hose situated in between shot valve and shot enter pipe. The shot cage is
situated under the shot enter pipe. It is secured by two screws situated on both sides of the
shot enter pipe. Loosen the screws, remove the shot enter pipe and the shot cage will turn
freely.
If the path is heavier on the left-hand side compared to the right, turn the cage counter-
clockwise. Turn in a clockwise direction if the path is heavier on the right-hand side. Retighten
the screws, fix the shot enter pipe and shot hose and try a test run. Repeat the adjustment if
necessary, until the path is smooth, even and without variation.
BLAST WHEEL AND SHOT CAGE INSPECTION
The blast wheel is a pure wear & tear part and must be checked regularly. It is recommended to
do a first check after approximately 50 hours of blasting. The life time of the blast wheel
depends on the application of the machine.
For example, a lot of wear & tear occurs when blasting soft concrete with a lot of surface fat.
Concrete dust is a very aggressive substance and increases wear & tear enormously. This
decreases when blasting steel or ceramic tiles. To give an accurate figure for the lifetime of the
wheel is therefore impossible. As a rough guide, this could be anywhere between 50 and 150
hours.
Take off the blast chamber with the reclaim chamber. The reclaim chamber is fixed with 4
screws on the blast chamber. The flange of the reclaim chamber must be sealed with silicon.
The blast chamber is also fixed with 4 screws to the machine frame. It should also be sealed
with silicon.
Now the blast wheel should be visible. In the middle of the wheel there is a hexagonal shaped
screw. Loosen the screw and remove the wheel from the blast chamber. Check the wear &
tear on the wheel. The thickness of the five blades should not be less than 3 mm. If less, the
blade could break and destroy the whole wheel. The same applies, if one of the blades is
damaged or broken as a result of a foreign body entering the wheel.
The shot cage is like the blast wheel - a pure wear & tear part and must be checked regularly.
Two different kinds of wear & tear on the cage are possible. The window in the cage has a
width of 30 mm. Change the cage if this width is more than 33 mm. The second type of wear &
tear is the decrease in the thickness of the cage wall itself. Change the cage before a hole
appears.
If the blast wheel and cage are in a good condition replace the parts using the opposite
direction to that described above.