Masterflex
Portable Sampling Drive Operating Manual
4-4
F. Inspect the brushes. If they are 0.160 in (4 mm) or less in length, replace the
brushes.
G. Repeat step D to remove the other brush.
H. Reverse the process to reinstall the brushes, reconnect the battery and
install the control panel. Connect the
RED
wire to the battery terminal
(positive). Connect the
BLACK
wire to the battery terminal marked
– (negative).
Replacing the Pump Head Sealing Gasket
(See Figure 4)
A gasket to seal the Pump Head is supplied with each unit and is
located on the control panel around the drive output shaft. The
gasket will deteriorate with time and frequent pump head changes.
To maintain the integrity of the IP protection of the unit, the gasket
should be changed if deterioration is noted, a leak develops, or after
one to two years of use, whichever comes first.
To replace the gasket, peel the gasket and its adhesive backing from
the control panel. Make sure to remove all gasket residue. An outline
of the gasket is shown on the control panel. Remove the release liner
from the adhesive backing of the new gasket and position the new
gasket within the gasket outline shown on the control panel.
Figure 4. Pump Head Sealing Gasket
Maintence
(Continue)
Section 4
Maintenance
Pump Head
Sealing Gasket
Figure 3. Motor Brush Replacement
Motor
Cap Motor Brush
Brush Assembly
