GMC 1976 ZEO 6083 Maintenance Manual page 842

2. Since the switch operates through two low
voltage contacts in the hose inlet, the voltage should
be checked here with a voltmeter at approximately
25 VAC. If there is no voltage at these contacts,
either the transformer is faulty or or the wiring is
loose. If there is voltage at these contacts :
a. Unplug the 120-volt motor wires at the
relay (See figure 3).
b. Next insert hose end into vacuum inlet.
c. Now check for continuity at the two termi-
nals on the relay where the motor wires were discon-
nected . If there is no continuity here the relay is
faulty .
d . If there is continuity at these terminals the
vacuum motor is faulty and must be replaced . See
"Vacuum Motor Replacement" .
LOSS OF VACUUM
The reasons for loss of vacuum are usually simple
and easily remedied . The following are the most
common causes :
1 . Hose may be obstructed . Remove from inlet.
Insert a blunt object that is slightly smaller in diame-
ter than the hose. A screwdriver (insert handle end
first) or steel ball can generally be shaken through
the hose to clear obstructions . A garden hose can
also be used to clear vacuum hose .
2. Filter bag may be filled .
3. Door to filter area may be open or gasket
surrounding door may be damaged. Door must be
closed securely for efficient operation of the power
unit .
4. Exhaust line may be clogged. Make a visual
inspection of exterior opening . Check for lint clog-
ging if a guard screen is being used . Clear exhaust
with a probe while unit is running.
The optional battery-operated wall clock is
located above the kitchen range.
BATTERY REPLACEMENT
Remove clock from wall by raising approxi-
OTHER EQUIPMENT 24Q- 3
5. Something may be clogging the tube line . Start
the unit, purge line by covering hose end with hand-
release to send a sudden surge of air through.
VACUUM MOTOR REPLACEMENT
(FIGURE 3)
REMOVAL
1 . Unplug vacuum cleaner assembly from duplex
receptacle .
2. Remove motor compartment cover (See figure
3. Disconnect vacuum motor wires at relay and
junction .
4. Remove screw at motor securing strap .
5. Remove motor and motor duct from cabinet
(figure 3) .
6. Remove motor from duct .
INSTALLATION
13ATTERY OPERATED CLOCK
1 . Install motor in duct with motor wires prop-
erly routed .
2. Install motor and motor duct in vacuum cabi-
net making sure motor seal is properly positioned
(figure 3) .
3. Secure motor with motor securing strap and
screw.
4. Connect motor wires at relay and junction .
5. Install motor cover .
6. Plug vacuum cleaner into receptacle and check
operation.
mately 1/2-inch, then carefully separate clock from
wall . Remove and discard used battery. Install new
1-1/2-volt "C" cell battery, being sure that positive
( - f- ) end of battery is installed as shown (when
viewed from the back of clock) .