Bridgeport Interact 2 - Timing Belt Replacement

10.
Lift
the belt
housing,
with
the speed changer bracket
attached, off the taper
pins
and
separate
it
from
the belt housing base. To
facilitate
this step, tap upward
on
the speed changer housing
(8050176)
with
a
plastic
mallet.
Several
blows may
be necessary to loosen the two housings.
11. Remove the
old belt and replace it
with a
new one.
CAUTION:
Do
not substitute a belt
purcbased
from
otber tban a Bridgeport
dealer.
Vibration
and ooerbeating could result
from
the use of a wrong belt.
NOTE Reassembly will
be
accornplisbed by reaersingtbe disassembly
procedure.
Difficulty
may be
encounterc'| wben
assemblingpulley
(7012643).
First
work tbe belt
as
far
toward tbe centre
tttiib;
e.drioen pulleys
(8025533
and 8025534)
aspossible. Next,
work tbe belt
as
far
a..
possible
toward
tbe
peripbery
of tbe drfue
pulleys
(1012643
and
7012642).
Witb
band
pressure
and
a small
plastic
rnallet,lower
pulley
(7012643)
until retaining ring
(8300610)
may be assembled.
8.2.5 Timing Belt Replacement
1.
With the motor running,
adjust
the
variable speed control to the
top of the speed range. The
speed changer
should
be?djusted
into the
red zone
and until the mechanical stop in the speed
changer
is
reached.
This adjustment may be made
in
either the high or low speed range.
2. Shut down
the
motor
3.
Lower the quill.
4.
Disconnect power
to the machine.
5.
Remove
the motor
pulley
cover
(8050195).
6.
Remove retaining
ring
(9300610).
7.
Loosen socket
set screw
and remove pulley
(7012643).
Be
prepared
for the pulley to
spring
up
approximately one half inch
when
the socket set screw is loosened.
8. Compress the lower pulley
<lOtZe+Dlt
)nd remove retaining
ring
(8050084).
t,
NOTE: This retaining
ring is
easily
darnaged and
may need replacing.
9.
Lift the lower
pulley
assembly
(70126+2)
comprising pulley
(8025642),
compression
spring
(8025661)
and the
collar
(8025644)
off
the motor
shaft.
10. Put
the HI-NEUTRAL-LO lever on
the right
side
of
the head
in
the
LO position.
11. Remove
the
two
lower
screws
(8300612)
in the
speed changer
housing
(8050176).
12. Remove
the two screws
(8300168)
and three
screws
(8301937)
holding
the belt housing
base
(80501
63) to
the
gear
housing
(8050162).
There are
two
dowel
pins
still
holding
these
parts
together. To facilitate
this step, tap upward
on
the
speed changer
housing
(8050176)
with
a
plastic
mallet.
Several
blows
may be
necessary to
loosen
the two
housings.
13.
The two upper
screws
(8300612)
on the
speed changer
housing
should
be loosened
after the
belt housing
has been loosened from
the gear
housing.
8-6