Linear SWR - Manual (Page 32)

SWR • SWC • SWD Swing Gate Operator Installation Guide
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227965 Revision X22 8-11-2011
Model SWD Maintenance
Battery Maintenance
The gel-cell batteries in this operator require no routine
maintenance. For assured continued performance, they
should be replaced every year. If power is to be removed
for one week or more, disconnect the negative wire from the
batteries as this will prevent deep discharging. Fully charge
before use after storage or upon initial installation.
DC Motor Brush Replacement
Brushes should be inspected every 100,000 cycles or
yearly, whichever comes fi rst. The motor has two brushes,
one on each side.
Original brushes are approximately 3/4” long and should be
replaced when they are 1/2” long, or sooner. If brushes are
allowed to wear beyond this point, permanent damage to
the motor may result.
To inspect the brushes: (1) remove the retaining cap with
straight-blade screwdriver; (2) carefully pull assembly
straight out; (3) measure the remaining brush material.
To reinstall: (4) place the brush in holder, aligning the
brush’s rounded indentation correctly with motor shaft; (5)
gently push in the spring and align metal contact with oval
slot in the brush holder, then push it in with retaining cap.
Hold the cap in place and thread the cap into brush holder.
Do not overtighten or cap will crack!
Repeat for the other brush.
1 REMOVE BRUSH RETAINING
CAP WITH FLATBLADE
SCREWDRIVER
4
5
2
3
PULL ON CONTACT
TO REMOVE BRUSH
3/4" WHEN NEW,
REPLACE WHEN 1/2"
LONG OR SOONER
INSPECT THE LENGTH
OF THE BRUSH
REPEAT INSPECTION WITH THE BRUSH
ON THE OTHER SIDE OF THE MOTOR
PUSH BRUSH INTO
THE HOLDER (IT ONLY
FITS IN ONE WAY)
REPLACE CAP AND
CAREFULLY SCREW
INTO HOLDER
DON'T OVERTIGHTEN
THE CAP, IT WILL CRACK!
Figure 15. Replacing DC Motor Brushes