Operation Manual

4
OPERATION TIPS
Match vibrator motor, shaft and head to the job. Select the largest vibrator suitable for
the job. Select the shortest shaft possible to do the job to assure maximum power to the
vibrator head.
Avoid sharp bends in the flexible shaft for highest efficiency.
Insert vibrator vertically, allow it to sink to the desired depth by its own weight, forcing
it may lock it between re-bars.
Hold the vibrator 5-15 seconds then slowly lift vibrator up, staying behind the trapped
air’s upward movement, allowing about 15 seconds for a 2 foot distance, to avoid re-
trapped air.
A slight up and downward movement will close the hole formed by the vibrator.
Withdraw the vibrator quickly when near the top, to prevent churning air into the top
layer.
Move vibrator and re-insert at a distance of 1 ½ times the radius of action.
Allow the vibrator to penetrate 3 to 6 inches into the preceding layer to knit the two
layers together to prevent “lift lines” when forms are removed.
Try to limit pours to 2 feet high, so air has less resistance to escape.
Do not use vibrator to move concrete laterally as it can cause segregation (use a shovel).
Place vibrator in centre of mounds to knock them down.
NEVER operate head out of the mix for more than a few minutes to prevent
overheating. Wet concrete keeps head at proper operating temperature.