BeaconMedaes 4107 9006 25 Installation, Operation And Maintenance Instructions page 32

"Oil-Less" Scroll Laboratory Air
6.0 Inspection/Replacement Procedures
To tighten the V-belts:
1. Remove the beltguard.
2. Loosen 4 bolts holding motor.
3. Adjust the two belt tensioning adjustment
rods on the sliding motor base until the proper
tension and alignment is obtained. To check
for correct alignment, place a straight edge on
the faces of the two sheaves. Proper alignment
is obtained when all the gaps between the
straight edge and the sheaves are minimized
and less than 1/8".
4. Check the belt tension again and make sure
the tension is similar to the values listed in
Table 6-1.
5. Replace the beltguard before operating the
machine.
CAUTION: IF THE COMPRESSOR IS OPERATED
WITH LOOSE V-BELTS OR IMPROPER SHEAVE
ALIGNMENT, THE LIFE OF THE V-BELTS IS
SHORTENED. EXCESSIVE TENSION CAN BREAK
THE SHAFT OR REDUCE BEARING LIFE. BE SURE
TO MAINTAIN PROPER V-BELT TENSION AND
ALIGNMENT.
6.1.3 Changing the V-Belts
V-belts should be changed yearly under normal
operating conditions.
V-belts should be replaced at once. To change
the V-belts call the nearest Lifeline® distributor or
follow the procedures described below:
To change the belts:
Remove the old belts:
1. Remove the beltguard.
2. Loosen the locking bolts securing the motor
base.
3. Adjust the belt tensioning adjustment rods on
the motor base to loosen tension on belts.
4. Remove the old belt(s).
4107 9006 25.11
If any damage is found,
Check and clean:
1. Check and clean all of the grooves of both the
motor and compressor sheaves.
2. Check the tightness of bolts on the sheave
bushings.
Installation of new belts:
1. Confi rm the belt type and length.
2. Place the belt(s) into the grooves of both
sheaves.
3. Adjust the belt tensioning adjusting rods on
the motor base until the proper tension and
alignment is obtained. To check for correct
alignment, place a straight edge on the faces of
the two sheaves. Proper alignment is obtained
when all the gaps between the straight edge
and the sheaves are minimized and less than
1/8".
4. Check the belt tension again and make sure
the tension is similar to the values listed in
Table 6-1.
5. Replace the beltguards before operating the
machine.
Figure 6.2 Belt Alignment - Straight Edge
6-2