ETS-Lindgren 2075 MiniMast (Archived) - Manual (Page 20)

About the Brakes MODEL 2075 MINIMAST™
16 © EMC TEST SYSTEMS, L.P. – MARCH 2002
REV D – PN 399235
ABOUT THE BRAKES
CARRIER SAFETY BRAKE
A safety brake is mounted on the carrier assembly. In the event
that the carrier is released from its rope suspension, a spring-
loaded lever jams the brake into position against the mast and
locks the carrier so that further vertical movement is restricted.
CAUTION If the carrier is at a position on the tower where it
cannot be accessed when the safety brake actuates the tower may
need to be leaned over to release the brake. Make sure there is a
clear area in which to tilt the tower. Take care not to damage the
tower or antenna during this process. The tower should be fully
supported as it is leaned over so as not to damage the mast.
To release the carrier safety brake, lift upward on the carrier and
move the brake lever. Slide the carrier down to the base of the
mast. Replace the carrier rope if necessary. Reset the current
position using the Model 2090 before resuming use of the mast.
ELECTRIC BRAKE
CAUTION Before making any adjustments, disconnect power
from the unit.
The tower uses a fractional horsepower motor with gear reduction.
This motor is supplied with a safety brake which holds the carrier
at the right position until another command is received. To adjust
the brake, remove the brake access cover and open the top of the
motor enclosure. Disconnect the air hoses from the solenoid valve
which is routed in back of the brake. Remove the brake cover
(attached by the two slotted screws). Insert an Allen wrench into
the adjusting screw and turn clockwise until the air gap is
approximately 8.7 mm (11/32 in). This gap is measured between
the operator assembly lever and the “C” frame at the center line of
the plunger.
Archived 3/18/10