OMM-05-0509-page 7
If the blower is going to be conveying material, it is the user’s responsibility to periodically turn the blower
off and lock out the power. The blower wheel should then be checked for material build-up and/or erosion. If
material has built up on any parts of the wheel, it MUST be removed and cleaned before it is put back into
service. If any parts of the wheel have been eroded, the wheel MUST be replaced. Failure to perform this
inspection can cause excessive vibration that will damage the blower and/or bearings. When vibration
becomes excessive, it will lead to complete blower failure that could cause property damage, severe
personal injury and death. The user must determine the frequency of this inspection based on the actual
circumstances of their operation, BUT checking the vibration readings should NEVER exceed a 12 month
period. For the AMCA/ANSI standard for vibration limits, see Fig. 5 on page 8.
The blower SHOULD NOT be operated if the vibration velocity of the blower exceeds 0.40 inches per
second, filter out, if the blower is rigidly mounted. If the blower is mounted on isolators or on an isolator
base, it SHOULD NOT be operated if the vibration velocity of the blower exceeds 0.65 inches
per second, filter out.
5
2
6
4
3
1
VIBRATION METER PROBE POSITIONS
For Arrangement 1 Blowers
Fig. 3 (Blower bearing reading points)
Fig. 4
