MVA 02 rev 5 - December 2017
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12.- Check correct pulley alignment again.
CAUTION:
Incorrect alignment causes excessive wear and greater friction on drive belts, higher power
absorption by the transmission, noise and vibrations that reduce the effective lifespan of the
transmission.
Generally, the tolerance in pulley alignment in V-belt drive transmissions may not be greater than 0.5
degrees or 5 mm for each 500 mm of distance between centres (Figs. 10-6 and 10-7).
CAUTION:
To remove pulleys, unscrew the grubscrews used to fix them and insert one or two of them in
the free holes, screwing them in until the bush is detached.
Type
Bush
Grubscrews
Length
[mm]
Max.
diameter
[mm]
N° Whitworth
Length
[mm]
Socket
size
Tightening
torques [N.m]
1008
(25.20)
22.3
35
2
1/4
13
3
5.5
1108
(28.20)
22.3
38
2
1/4
13
3
5.5
1210
(30.25)
25.4
47
2
3/8
16
5
20
1215
(30.40)
38.1
47
2
3/8
16
5
20
1310
(35.25)
25.4
52
2
3/8
16
5
20
1610
(40.25)
25.4
57
2
3/8
16
5
20
1615
(40.40)
38.1
57
2
3/8
16
5
20
2012
(50.30)
31.8
70
2
7/16
22
5
20
2517
(65.45)
44.5
85
2
1/2
25
6
50
3020
(75.50)
50.8
108
2
5/8
32
8
90
3030
(75.75)
76.2
108
2
5/8
32
8
90
3535
(90.90)
88.9
127
3
1/2
38
10
115
4040
(100.100)
101.6
146
3
5/8
44
14
170
4545
(115.115)
114.3
162
3
3/4
51
14
195
5050
(125.125)
127
178
3
7/8
57
17
275
Chart 10-1 Tightening torques
