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"Oil-Less" Scroll Laboratory Air
6.0 Inspection/Replacement Procedures
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
No.
Belt Part
Hp
Number
Belts
2
4107 6524 39
3
4107 6562 18
5
4107 6524 41
7.5
4107 6540 93
10
4107 6544 20
15
4107 6544 20
Table 6-1B Belt Size and Tension (for new belts)
on systems operating at 50 Hz
No.
Belt Part
Hp
Number
Belts
2
4107 6524 41
3
4107 6524 41
5
4107 6524 42
7.5
4107 6562 19
10
4107 6544 20
15
4107 6505 47
Tensioning
Force
Force
of
Defl .
New
Norm
(in)
(lbs)
(lbs)
1
1/4"
6
1
1/4"
6
2
7/32"
6
2
1/4"
6
4
9/32"
6
4
9/32"
6
Tensioning
Force
Force
of
Defl .
New
Norm
(in)
(lbs)
(lbs)
1
1/4"
6
1
1/4"
6
2
7/32"
6
2
1/4"
6
4
9/32"
6
4
9/32"
6
Before
starting
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.
5
Check the belt tension monthly. Disconnect the
5
main power and remove the beltguard. As shown
5
in the illustration below, Figure 6.1, defl ect each
V-belt at the center of the drive span with a spring
5
balance or tension meter at the tension force of
5
Table 6-1. Then check that the average defl ections
5
at the proper tension force are approximately the
same values as shown in Table 6-1.
5
5
5
5
5
5
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.
6-1
WARNING:
any
maintenance
4107 9006 25.11
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