5.
13. If the choke lever was moved to the CLOSED position to start the engine,
gradually move it to the OPEN position as the engine warms up.
14. Place the VMG-1750BP unit on your back just as you would a backpack.
Place your arms through the spaces between the straps and the frame. Buckle
the chest strap. Adjust the shoulder and chest strap as needed.
15. You are now ready to vibrate concrete with your VMG-1750BP.
i. Use the black throttle lever on the left side of the frame to regulate the
vibrator speed. Keep in mind, that when consolidating concrete, faster is
not always better. The best performance might be obtained with the
throttle lever in a position below FULL throttle.
ii. The VMG-1750BP is equipped with a centrifugal clutch. By moving the
throttle to the SLOW position, the clutch will disengage allowing the
vibrator head to stop. Do not leave the vibrator head running in air.
RUNNING THE VIBRATOR HEAD IN AIR WITHOUT REGULARLY
SUBMERSING IT IN THE CONCRETE WILL OVERHEAT THE BEARINGS.
If the head is to be held out of the concrete, move the throttle lever to the
SLOW position to prolong bearing life.
iii. To stop the engine at any time, simply move the throttle lever to the SLOW
(fully down) position, and turn off Stop Switch.
Follow the guidelines below when using your Viber® Internal Concrete Vibrator
for consolidating concrete:
1.
DO NOT
leave the vibrator running in air. Totally submerse the vibrator
head in the concrete. This cools the bearings. Running the vibrator in air
without regularly submersing it in the concrete will overheat the bearings.
2. Avoid making sharp bends in the flexible shaft.
3. Make sure you can see the concrete surface. Use lighting if necessary.
4. Place the concrete in layers no deeper than the length of the vibrator head
plus 4-6”. Layers should not exceed 18-20”, otherwise the weight of the
concrete will prevent the entrapped air from escaping.
5. Keep the vibrator head at least 3-4” from the forms. It can damage them
causing surface defects in the concrete.
6. Do not allow the vibrator head to touch reinforcements, such as rebar.
Vibration can break the bond between the reinforcement and preceding
layers of stiffened concrete.
WARNING
The backpack system must be worn on the operators back for it to func-
tion properly. Do not attempt to operate the vibrating head while the
backpack is not being worn.
IMPORTANT
To stop the engine at any time, turn engine stop switch to “off”.
WARNING
When putting on the backpack, lift the unit by bending your knees. Do
not lift with your back.
