6-1
“Oil-Less” Scroll Laboratory Air
4107 9006 25.11
6.1 V-Belts
Narrow type V-belts are used for this unit. Refer to
Table 6-1a & 6-1b for the correct size.
6.1.1 Tension Check
Table 6-1A Belt Size and Tension (for new belts)
on systems operating at 60 Hz
Hp
Belt Part
Number
No.
of
Belts
Tensioning
Defl .
(in)
Force
New
(lbs)
Force
Norm
(lbs)
2
4107 6524 39
1
1/4”
6
5
3
4107 6562 18
1
1/4”
6
5
5
4107 6524 41
2
7/32”
6
5
7.5
4107 6540 93
2
1/4”
6
5
10
4107 6544 20
4
9/32”
6
5
15
4107 6544 20
4
9/32”
6
5
Table 6-1B Belt Size and Tension (for new belts)
on systems operating at 50 Hz
Hp
Belt Part
Number
No.
of
Belts
Tensioning
Defl .
(in)
Force
New
(lbs)
Force
Norm
(lbs)
2
4107 6524 41
1
1/4”
6
5
3
4107 6524 41
1
1/4”
6
5
5
4107 6524 42
2
7/32”
6
5
7.5
4107 6562 19
2
1/4”
6
5
10
4107 6544 20
4
9/32”
6
5
15
4107 6505 47
4
9/32”
6
5
WARNING:
Before starting any maintenance
procedures, disconnect all power to the
package.
Never perform any maintenance functions
while the unit is in operation.
Release all pressure from the package
before removing, loosening, or servicing any
covers, guards, fi ttings, connections, or other
devices.
Check the belt tension monthly. Disconnect the
main power and remove the beltguard. As shown
in the illustration below, Figure 6.1, defl ect each
V-belt at the center of the drive span with a spring
balance or tension meter at the tension force of
Table 6-1. Then check that the average defl ections
at the proper tension force are approximately the
same values as shown in Table 6-1.
Figure 6.1 Belt Tension
6.1.2 V-Belt Tension Adjustment
If necessary, adjust the V-belts until the average
defl ections are within the values shown in Table
6-1.
6.0 Inspection/Replacement Procedures
