Installing The Belt Cover; Connecting The Connecting Rod; Adjusting The Belt Cover Safety Mechanisms - Brother MD-602 Service Manual

5.3 Installing the belt cover

q
w

5.4 Connecting the connecting rod

q

5.5 Adjusting the belt cover safety mechanisms

Forward rotation
e
r
Mark for 105 mm-
diameter pulley
Mark for 90 mm-
diameter pulley
Mark for 80 mm-
diameter pulley
Reverse rotation (Overlock machines)
6
w
r
e
w
A
w
q
Mark for 80 mm-
Mark for
diameter pulley
90 mm-
Mark for 105 mm-
diameter
diameter pulley
pulley
e
r
1. Secure the belt cover q to the motor e with the two
screws w as shown in the illustration. At this time, po-
sition the belt cover q so that it does not touch the belt.
e
2. A belt casting prevention guide and finger guide are
provided on the belt cover. Refer to "5.5 Adjusting the
belt cover safety mechanisms" on this page.
• Pass the connecting rod joint q through hole A in the
treadle lever w, and tighten it with the spring washer
e and nut r.
• Adjust the position of the machine treadle plate so that
the connecting rod is perpendicular to the treadle plate.
Note:
The treadle pressure is adjusted to the position of hole
A at the time of shipment from the factory. Refer to "6.
Adjusting the treadle unit".
5.5.1 Adjusting the belt casting prevention guide
1. Loosen the screw q.
2. A mark showing the pulley size is stamped on the belt
cover. (The available inner diameters are 90 mm, 105
mm and 80 mm.)
Adjust the position of the belt casting prevention cover
w in accordance with the pulley size. Align the projec-
tion position with the mark. (For 80 mm diameter pul-
leys, install the belt casting prevention cover w in the
reverse direction.)
3. After adjusting, tighten the screw q.
Note:
This safety guide will prevent the belt from coming off
even when the machine head is tilted back.
5.5.2 Adjusting the finger guard
1. Loosen the screw e.
2. Install the finger guard so that it is on the belt winding
side.
3. A mark showing the pulley size is stamped on the belt
cover. (The available inner diameters are 80 mm, 90
mm and 105 mm.)
Adjust the position of the finger guard r in accordance
with the pulley size. Align the center of the screw with
the mark.
4. After adjusting, tighten the screw e.
Note:
The finger guard is a safety mechanism that prevents
fingers from being caught in the belt.
Change the position of the finger guard r to match the
direction of rotation of the motor pulley.
MD-602, 612