Onan UF Series Instruction Manual And Parts Catalog page 65

I N S T A L L A T I O N
USE THIS TABLE ONLY FOR GENERATORS STAMPED 1800 RPM ON
THE GENERATOR NAMEPLATE.
The pulley sizes recommended in this table are approximate sizes only,
in 1/2" steps. The sizes shown do not include any allowance for belt
slippage. Belt slippage for flat belts may sometimes reduce the gener-
ator driven speed, under load, as much as 4 per cent.
To select a generator pulley size from the table, measure the DIA-
METER (not the distance around)of the driving pulley. Select the line
at the left side of the table for the driving pulley size. Follow this line
across to the speed column that is nearest to the recommended speed of
the driving pulley. The size in the square at this point is the approx-
imate size of the generator pulley which will be required. If the recom-
mended size pulley can not be obtained, select one size smaller pulley.
This will help to offset belt slippage. Adjust throttle or governor as
necessary to obtain proper speed.
Example:
If a 12 inch drive pulley operates at 1100 rpm, follow the 12 inch line
across to the 1100 rpm column. The generator pulley size at the point
of intersection is 7 inch. This example is outlined in heavy lines in the
table.
DRIVING
P U L L E Y
SIZE
DRIVING P U L L E Y SPEED IN REVOLUTIONS PER MINUTE
DRIVING
P U L L E Y
SIZE
600 70o| 800
GENEF
900
tATO
i o o o ^ iioSj 1200
R P U L L E Y SIZE ]
1300
REQUI
14001
RED
1500
1800 1
1600
a.P.N
1700
I. GEI
1800 |
4ERA1
1900
roR)
2000
6 2 2
2*
3
3
if
5 5
54
6 6 64
6*
2
2*
2i
3
34
1 *
u 5
5 5i
6
64 64
7
7
2 2i
3
34 h
: * /
14 5 54 54
6
64
7
74 74
7i 2*
3
3
34 h
^ /
5
54 54
6
64
7 7i 8 8
8
2*
3 3i it
5
54
6
64 7 74
8
84
9
8* 2*
3 3i
h
54
6
64 7
74
8 84
9
94
9
3
3*
h 5
54
6
64
7 74
8
84
9
94
10
9i
3
34
5
/ 5 1
6 64 7
8
84 9 94
10
104
10
3i
5
54
' 6
64
7
74
8
9
94
10 104
11
ioi
3i
k
54
54
! ^
7
74 8 84
9
10 104
11
u i
11 3!
k
54
6
/ * <
7
8
84 9
94
10 11
H i 12
111 5
54
6
( 7
74 8
9
94
10
ioi u i 12
024
1111)11)111
1 12
k
TTTTT
5
7 7 / / /
6
IIIII
IIIIIII
8
84 9
10 104
11
12 12i
13
12!
h
5i
6
7
74
8
9
94
104
11
114
12i
13
434
13
k 5
5i
64
7
8 84
9
10
io4
i i i 12
13
134
14i
5
6 64 74
8
9
94 104
11 12
124 134
llv
15
1 1 1
5j
6
7
74
64
94
10
11 i i | 124
13
lh 1U4
154
14 5 5i
7
8
& 4
94
104
11
12 124
13
114
15
16
15 5 5i 6*
74
8
9
10
IOJ
114 124
13
lh
15 154
164
I5i
5
6
64 74
84
94
io4
11
12
13
134
14
154
16
17
16
5!
6
7
8
9
10
11
114
124
13
ih 15
16
164 174