Installation, Operation and Maintenance Manual
Unimaster Dust Collectors – Series UMA 40-750
34
MAINTENANCE
V-belt drive tensioning
The Polyvee drive belt has been pre-stretched and tensioned during assembly
but will require checking for correct tension after the first day of operation, when
it will have fully seated into its grooves. Tension should be as shown in figure 14
and is adjustable by loosening (not removing) the four bolts securing the motor.
Slot holes in the motor baseplate permit the necessary adjustment.
Incorrect tensioning can be harmful to the belt and also impair the
operating efficiency of the dust collector itself.
UMA 40 to 450
Filter assembly removal
1 Isolate electrical controls and open fan and filter chamber access doors.
2 Fully slacken the four captive wing-nuts located in the fan chamber, on the
top plate of venting type collectors or in the side outlet box.
3 With the aid of a colleague, withdraw the complete filter assembly through
the front of the filter chamber.
(Filter bag assembly renewal)
4 Remove wire mesh insert frames from individual filter bags. These should
be checked for broken mesh and worn material edgings, especially around
the area of any filter bag damage.
5 Detach filter bag assembly from supporting frame.
6 Fit new filter bag assembly into supporting frame, feeding individual filter
bags between locating bars, and fold collar over peripheral sealing flange.
7 Prior to fitting wire mesh inserts, any material edgings that need replacing
should be fitted around the three edges of the insert that do not have the
insert frame joint. The inserts should then be fitted, edging first, into the filter
bags.
(Filter assembly replacement)
8 With the aid of a colleague, slide filter assembly into the guides until bottom
corners of filter bags make contact with the shaker bar.
9 Locate individual filter bags in shaker bar.
10 Slide filter assembly fully home and tighten securing wing nuts to form an
airtight seal. Check top frame is against sealing rubber (see fig. 17).
11 Close and fasten access doors.
12 If in doubt regarding the safe disposal of the used filter bag assembly, consult
your Environmental Health Officer.
