Install Balance Wheel and Belt
Ultrafeed sewing machines arrive with the Posi-Pin
®
bushing and nut installed on the upper shaft
of the sewing machine. The belt that connects the idler pulley to the motor pulley is also already
installed. The balance wheel and large timing belt do not come installed on the machine.
NOTE:
Ultrafeed PREMIUM sewing machines also include the Monster
®
II Balance Wheel which
may be installed in place of the standard Power Plus
®
Fly Wheel. Installation instructions for the
Power Plus Flywheel and Monster II Balance Wheel are the same.
9.
Remove the Posi-Pin (wrapped in plastic) from the
Posi-Pin Wheel Bushing.
10.
Verify that the timing belt is looped around the small
cogged pulley of the idler pulley and between the
Bobbin Winder Stopper and the Spool Pin (
A
).
11.
Remove the two screws located above and below
the pulley drive (
B
). Position the belt cover over the
idler pulley and belt. Snug the two screws back in
place to secure the belt cover (
C
). You may need
to adjust the placement of the belt cover after the
balance wheel is installed to be sure that there
is proper clearance all around the underside of
the wheel.
Tip:
We recommend using a magnetic
screwdriver for this step.
12.
Free the top of the Timing Belt by pushing the
Bobbin Winder Stopper away from the belt.
Unscrew the reverse-threaded Posi-Pin Nut (
D
).
Slide the Power Plus Fly Wheel onto
the Posi-Pin Wheel Bushing, making sure the
Timing Belt is over top of the machine (
E
) and to
the left of the balance wheel.
13.
Thread the reverse-threaded nut back onto the
bushing and tighten by hand.
14.
Check to be sure the Timing Belt is still around the
small cogged pulley of the idler pulley. If it is, install
the balance wheel belt. Turn the balance wheel
while guiding the belt into place around the large
wheel from the inside (just like a bicycle chain) (
F
).
15.
Rotate the balance wheel until a hole in the
balance wheel is aligned with one of the four
bushing holes (use any of the three balance wheel
holes available). Push the Posi-Pin through the
holes to lock the balance wheel to the bushing (
G
)
(it will spring back slightly). Rotation of the balance
wheel will now cause the machine to function.
16.
To disengage the clutch (for bobbin winding),
pull the Posi-Pin out of the balance wheel. The
balance wheel will now rotate without operating the
machine. Push the pin into the hole at the center of
the Posi-Pin nut to store.
A
B
D
E
C
F
G
