MAINTENANCE
77
8410D MM391 (6--05)
THERMO SENTRY
The Thermo Sentry senses the temperature of the
air pulled up from the hopper. If there is a fire in
the hopper, the Thermo Sentry stops the vacuum
fan and cuts off the air flow.
Reset the Thermo Sentry by pushing in its reset
button.
SCRUB HEAD
The scrub head encloses the scrub brushes and a
solution dispensing system. The scrub head is
located directly behind the sweeping brush
compartment.
The scrub head is factory adjusted and the
measurement should not be changed unless
scrub head parts are damaged or are replaced.
BRUSHES
MAIN SWEEP BRUSH
The main sweep brush is cylindrical and spans
the width of the machine, sweeping debris into the
hopper.
Check the brush daily for wear or damage.
Remove any string or wire tangled on the main
brush, main brush drive hub, or main brush idler
hub.
Check the main sweep brush pattern daily. The
pattern should be 50 to 65 mm (2.0 to 2.5 in) wide
with the main sweep brush in the lowered
position. Adjust the main sweep brush pattern by
turning the main brush pressure knob located next
to the brush position lever.
Rotate the main brush end-for-end every 50 hours
of operation for maximum brush life and best
sweeping performance.
Sweeping performance often becomes less
effective as the bristle length is worn. Replace the
main brush when the remaining bristles measure
between 40 mm (1 1/2 in) and 50 mm (2 in) in
length.
Summary of Contents for 8410D
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