MAINTENANCE
EXP 98363 03/24/00
10
TO ACCESS PUMP AND BRUSH MOTOR
1.
Situate machine in order to access bottom
cover. Remove screws (6) and bottom cover.
2.
To remove brush motor, loosen nuts at brush
motor and slide motor forward to reduce belt
tension. Remove belt. Continue loosening nuts at
brush motor until free from brush bracket.
Disconnect wires.
3.
To remove pump, loosen screws holding pump
mounting bracket to casting and remove as one unit.
Lift pump and mounting bracket up to gain access to
all hose clamps which need to be removed
before
pump is free from machine. Disconnect wires.
TO ACCESS VAC MOTOR
1.
Lift off recovery tank.
2.
Remove screws (5) and lift off vac motor
cover.
3.
Vac motor can be lifted out and electrically
disconnected.
4.
When replacing the vac motor, make sure
the excess wire lengths do not get pinched
in the gaskets which seal the vac motor. If
need be, remove the rear control panel and
pull excess lead
length out of the vac motor
compartment.
VAC MOTOR BRUSHES
1.
To inspect motor brushes, remove vac
motor from tank by disconnecting wires.
Then remove black vac motor fan housing
and brush holder assembly.
Brushes should
be replaced when worn to 3/8 inch or after about
750 operating hours. After second brush
replacement, the armature commutator should
be checked for pitting and concentricity. Vac
motors can be repaired, but such repairs should
be made by a qualified motor repair shop.
VAC MOTOR BRUSHES cont..
NOTE: When replacing electrical component parts refer
to Wiring Diagram for proper connection.
NOTE: The vac motor is protected by a circuit breaker
located in the switch panel. The breaker will only trip
under conditions of abuse.
SOLUTION VALVE CABLE ADJUSTMENT
The solution valve cable has been factory set so that
action of the solution lever moves the valve from fully
closed to fully open. As the machine operates the cable
will stretch and the lever will not be able to fully open the
valve. The play in the solution lever should be checked
periodically and adjusted when needed as described
below.
1.
Loosen the lock nut at the point where the cable
enters the lever housing on the machine handle.
2.
Turn the threaded end of the cable sleeve to
adjust.
Threading the end further into the
housing will slacken the cable, increasing the
play in the lever. Threading the end out of the
housing will tighten the cable, decreasing the
play in the lever.
3.
Tighten the locking nut against the housing after
adjusting the play as required.
4.
If there is not enough thread adjustment
available, the cable length can be adjusted
directly at its connection to the solution valve.
This is accessed by removing the back control
panel.
SPRAY JET
Note: To prevent a clogged jet due to alkali build-up,
the spray system should be flushed with 1 to 2 gallons
of clean hot water at the end of each day.
1.
Situate machine in order to access bottom cover.
2.
The machine is equipped with a ”Quick Change”
jet that can be easily removed for cleaning. To
remove- push jet in and rotate 1/4 turn.
3.
Wash jet and blow dry. Do not use pins or wire
to remove obstruction as this will change spray
pattern.
VAC M OTOR
location
of brushes
end cap
ground
3/8
