5
Figure 5
Tip the machine back and remove the pad and the
drive block or brush. The condition of the floor pad or
brush has a direct affect on the performance of your
floor machine. When the pad becomes dirty, turn it over
and use the other side. When finished, wash the pad
or brush and allow it to dry completely before using
it again. Stand the wet brush on the bristles until dry,
then hang up the brush. Do not store the machine with
the drive block, pad or brush on the machine. Wipe off
the machine housing and wheels to prevent build-up of
unnecessary residue.
TRANSPORTING THE MACHINE
Place the handle in the upright position. Lock the handle
cam release lever. Tip the machine back and transport
on the wheels, keeping in mind the machine’s weight.
MAINTENANCE FOR THE NM201HD AND NM171HD
Once a month remove the motor cover and vacuum out
any dust or debris which has accumulated on the motor,
Figure 5.
Replace the motor cover by setting it over the holes in
the housing and replace all of the screws. Check and
maintain the tightness of all the fasteners.
WARNING:
Do not over-tighten the switch housing
screws.
Keep the machine clean especially at the handle tube
and collar so the handle tube will move freely through
the collar. Inspect the cord for cuts, gashes, or loose
prongs; replace as needed.
Disassembly of this motor voids the warranty.
Improper disassembly and assembly of this motor can
permanently damage the field or rotor.
For NM202 only:
The length of the carbon brushes
should be inspected annually. If they are no longer
extended past the holder window, they should be
replaced. Replacement of the carbon brushes should
only be done by a qualified service technician.
TROUBLESHOOTING
Machine does not run.
The circuit breaker has tripped. Allow the circuit breaker
2 minutes to cool before resetting. Plug is broken or has
loose contact. Replace.
Prevent circuit overload.
Check the pad and change it if it is rough or dirty. Spray
buffing or spray cleaning is not a substitute for scrubbing
or mopping a floor. Prepare the floor surface before
spray buffing. Eliminate any extension cord that is
smaller than 12/3 wire or greater than 25 feet in length.
Unplug anything other than the machine from the circuit
or locate another circuit.
Machine will not start.
Circuit breaker is not reset. Reset breaker.
Plug is broken or has a loose contact. Replace.
Circuit breaker is defective or weak. Replace.
Switch is defective. Replace switch.
Rectifier is defective. Replace rectifier (NM202 only).
Machine will not reach operating speed.
Unplug anything else other than the machine from the
circuit or locate another circuit.
Motor runs but pad or brush does not turn.
Coupling is broken. Replace. Coupling is not covered
under warranty. Do not attempt to place a running
machine over a block or brush. Always place and remove
the block or brush by hand.
WARNING:
All service work to be performed by certified technician,
or it may void the warranty.
