Gorman-Rupp Pumps 66B3-B 407277 and up - Manual (Page 14)

60 SERIES OM−01459
PAGE B − 7 INSTALLATION
the large O-ring is even with the top of the next belt,
or with the bottom of a straight edge laid across the
sheaves.
Read the force applied from the bottom of the small
O-ring on the deflection force scale. Compare this
force with the value shown in Table 1 or 2 and ad-
just the tension accordingly. Note that the tension
for new belts is higher than that for used belts to
allow for expected belt stretching. Do not over-ten-
sion used belts to the higher deflection forces
shown for new belts.
Table 1. Sheave Diameter (Inches)
Deflection Force (Lbs.)
Cross
Section
Smallest
Sheave
Diameter
Range
R.P.M.
Range Used
Belt New
Belt Used
Belt New
Belt
Belt Deflection Force
Uncogged
Hy-T Belts &
Uncogged
Hy-T Torque
Team Cogged
Torque-Flex
& Machined
Edge torque
Team Belts
A,AX
3.0 - 3.6
1000-2500
2501-4000 3.7
2.8 5.5
4.2 4.1
3.4 6.1
5.0
3.8 - 4.8
1000-2500
2501-4000 4.5
3.8 6.8
5.7 5.0
4.3 7.4
6.4
5.0 - 7.0
1000-2500
2501-4000 5.4
4.7 8.0
7.0 5.7
5.1 9.4
7.4
B,BX
3.4 - 4.2
860-2500
2501-4000
4.9
4.2 7.2
6.2
4.4 - 5.6
860-2500
2501-4000
5.3
4.5 7.9
6.7 7.1
7.1 10.5
9.1
5.8 - 8.6
860-2500
2501-4000
6.3
6.0 9.4
8.9 8.5
7.3 12.6
10.9
C,CX
7.0 - 9.0
500-1740
1741-3000
11.5
9.4
17.0
13.8 14.7
11.9 21.8
17.5
9.5 - 16.0
500-1740
1741-3000
14.1
12.5 21.0
18.5 15.9
14.6 23.5
21.6
D
12.0 - 16.0
200-850
851-1500
11.5
9.4
17.0
13.8 14.7
11.9 21.8
17.5
18.0 - 20.0
200-850
851-1500
30.4
25.6 45.2
38.0
3V,
3VX
2.2 - 2.4
1000-2500
2501-4000 3.3
2.9 4.9
4.3
2.65 - 3.65
1000-2500
2501-4000 3.6
3.0 5.1
4.4 4.2
3.8 6.2
5.6
4.12 - 6.90
1000-2500
2501-4000 4.9
4.4 7.3
6.6 5.3
4.9 7.9
7.3
5V,
5VX
4.4 - 6.7
500-1749
1750-3000
3001-4000
10.2
8.8
5.6
15.2
13.2
8.5
7.1 - 10.9 500-1740
1741-3000
12.7
11.2 18.9
16.7 14.8
13.7 22.1
20.1
11.8 - 16.0 500-1740
1741-3000
15.5
14.6 23.4
21.8 17.1
16.8 25.5
25.0
8V
12.5 - 17.0
200-850
851-1500
33.0
26.8 49.3
39.9
200-850
851-1500
39.6
35.3 59.2
52.7 18.0 - 22.4
Table 2. Sheave Diameter (Millimeters)
Deflection Force (KG.)
Cross
Section
Smallest
Sheave
Diameter
Range
R.P.M.
Range Used
Belt New
Belt Used
Belt New
Belt
Belt Deflection Force
Uncogged
Hy-T Belts &
Uncogged
Hy-T Torque
Team Cogged
Torque-Flex
& Machined
Edge torque
Team Belts
A,AX
75 - 90
1000-2500
2501-4000 1.7
1.3 2.5
1.9 1.9
1.5 2.8
2.3
91 - 120
1000-2500
2501-4000 2.0
1.7 3.1
2.6 2.3
2.0 3.4
2.9
125 - 175
1000-2500
2501-4000 2.4
2.1 3.6
3.2 2.6
2.3 4.3
3.4
B,BX
85 - 105
860-2500
2501-4000
2.2
1.9 3.3
2.8
106 - 140
860-2500
2501-4000
2.4
2.0 3.6
3.0 3.2
3.2 4.8
4.1
141 - 220
860-2500
2501-4000
2.9
2.7 4.3
4.0 3.9
3.3 5.7
4.9
C,CX
175 - 230
500-1740
1741-3000
5.2
4.3 7.7
6.3 6.7
5.4 9.9
7.9
231 - 400
500-1740
1741-3000
6.4
5.7 9.5
8.4 7.2
6.6 10.7
9.8
D
305 - 400
200-850
851-1500
11.3
9.6
16.8
14.2
401 - 510
200-850
851-1500
13.8
11.6 20.5
17.2
3V,
3VX
55 - 60
1000-2500
2501-4000 1.5
1.3 2.2
2.0
61 - 90
1000-2500
2501-4000 1.6
1.4 2.3
2.0 1.9
1.7 2.8
2.5
91 - 175
1000-2500
2501-4000 2.2
2.0 3.3
3.0 2.4
2.2 3.6
3.3
5V,
5VX
110 - 170
500-1749
1750-3000
3001-4000
4.6
4.0
2.5 6.9
6.0
3.9
171 - 1275 500-1740
1741-3000
5.8
5.1 8.6
7.6 6.7
6.2 10.0
9.1
276 - 400 500-1740
1741-3000
7.0
6.6 10.6
9.9
7.8
7.6 11.6
11.3
8V
315 - 430
200-850
851-1500
15.0
12.2 22.4
18.1
200-850
851-1500
18.0
16.0 26.8
23.9 431 - 570