Quincy Compressor QR-25 Series Instruction Manual page 28

QR-25 Series
52201-107, December 2012
Belt Motor Pulley
Cross Dia. Range
Section (inches)
up to 3.0
A 3.1 - 4.0
4.1 - 5.0
5.1 + above
up to 4.6
B 4.7 - 5.6
5.7 - 7.0
7.1 + above
Step 2)
Determine the amount of deflection ( in inches) required to measure
de flection force (in pounds) by multi plying the span length x
(.016) (i.e. 32" span length x
to measure de flection force).
Step 3)
Lay a straightedge across the top outer surface of a drive belt from
pulley to sheave.
Step 4) At the center of the span, perpendicu lar to the belt, apply pressure
to the outer surface of the belt with a belt tension gauge (refer to
Fig. 5-2, Belt Tension Gauge). Force the belt to the predetermined
deflection (refer to Step 2 above).
belt tension gauge and compare to the chart following Fig 5-1.
The de flection force reading should be within the minimum and
maximum values shown. Adjust belt(s) accord ingly. New belts
should be tensioned to the values listed under "Initial Install".
Step 5) Recheck the tension of the new belts several times in the first 50
hours of operation and adjust if necessary. Thereafter, check belt
tension on a regular basis (refer to SECTION 5, Maintenance
Schedule).
28
Recommended
Deflection Force (lbs.)
Initial Install. Minimum
3.6 2.4
4.2 2.8
5.2 3.5
6.1 4.1
7.3 4.9
8.7 5.8
9.3 6.2
10.0 6.8
Fig. 5-1
Setting Belt Tension
/ [.016] = / "[.50] of deflection required
1 1
64 2
Record the reading on the
3501 Wismann Lane, Quincy IL - 62305-3116
Maximum
3.1
3.6
4.6
5.3
6.4
7.5
8.1
8.8
Pix 1152
/
1
64
Quincy Compressor