Windsor EM-21A, Instruction Manual

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BRUSH REMOVAL
Motor)
41.
Brush caps are held in place with
type rivets. Snap brush caps out using
large screwdriver
tip under
cap
overhang.
Brushes are retained by constant-force,
springs. To springs, press
inward on the end of the spring retaining
bracket using the tip of a pair
of long nose
pliers or other appropriate
tool.
Springs
should “pop” out.
If
they don’t, they
can be removed by pulling outward on
the spring retaining bracket with a pair
of
long nose pliers. Brushes can now be
removed
by
pulling them out of the brush
boxes by their “pigtails.”
It
is not neces-
sary
to
the brush pigtail dip from
its connection to the brush box tab for
brush inspection.
BRUSH INSPECTION AND
Motor)
Brushes should be replaced they
are less than inch
(7
mm.) in length.
Carbon dust accumulation should be re-
moved periodically. If the end shield has
been removed from the drive. a clean.
dry, cloth can be used
for
cleaning. Do not use solvents as they
may damage the nonmetallic end shield.
IMPORTANT
-
Make certain that the
type springs are positioned directly on
the brushes.
8. The drive motor is equipped with
sealed ball bearings and does not
require lubrication.
9.
The gear box on drive motor
is grease-lubricated
to
last tor the
design life of the gear motor.
CLUTCH ADJUSTMENT
AND
Clutch)
1.
Depending on the duty cycle and
load, periodic inspections of the
wear rate should be made. The air
gap
I S
preset at the factory to
010. When this gap increases to
it
must readjusted to
specs
To adjust, use a feeler gauge (of
spec. value) and turn the
(3) set
screws in equally
to
close air gap.
When air gap can no longer ad-
justed clutch must be replaced.
Care should be taken
to
insure that
dust, oil. grease, soap, water.
etc. does not come in contact with
the working surfaces (rotor and
armature faces) of the
unit. If fric-
tion faces become dirty, the clutch
will slip, causing overheating and
a
loss of torque.
If clutch fails to engage, check the
following:
A. Check air gap:
as required.
B.
Check for contamination of the
C.
Check electrical connections.
D. Check for grounded or coil.
Grounded Coil: Disconnect ma-
chine from power source. With
ohmmeter connected between
clutch lead and housing, there
should be no reading on meter
(check both clutch leads). If ohm
meter shows a reading, the coil
is grounded and clutch must be
replaced.
Open Coil: Use ohmmeter
to
measure resistance between
clutch leads. Reading on ohm-
meter should be ohm.
An open coil indicates near
zero reading and clutch must
be replaced.
working faces.
(Von
Motor and
Marquette
1. Disconnect machine power cable
from electrical source.
2. To access traverse drive re-
fer to “Tank Removal” instructions.
3. Disconnect
motor
lead connector.
43.
4. Disconnect leads from clutch arm
solenoid.
5. Remove chain. NOTE: Chain has
master link for easy removal.
(Photo 31)
6. belt
access
(Photo
12)
bottom splash guard
(Photo
7. Remove
(4)
screws and nuts
motor and clutch to main frame.
Remove motor and clutch and put
on work bench
to
service.
44.
8.
Remove brush cap and Inspect
motor brushes periodically. Brushes
should be replaced when
they reach
length or after approximately
750 operating hours. The gear box
is
sealed and permanently
for
the life of
motor.
CLUTCH ADJUSTMENT
AND
(Marquette
Clutch)
1. Depending
on
the duty cycle of the
clutch, periodic inspections should
be made.
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