Maintenance
CAIR
fricostar
®
FläktGroup DC-2009-0019-GB 2018-01/R9 • Specifications are subject to alteration without notice
65
Abb. 9-1:
Pulley alignment and fan belt tensioning
•
Adjusting or removing fan belt pulley
•
Slacken fan belt, refer to „Re-tensioning or replacing V-belt“ on page 64, after that:
•
remove the belt.
•
Loosen and remove both hexagon-socket screws (2).
•
Screw a hexagon-socket screw into the empty threaded hole (1) and turn it until both
pulley and bush are loose.
•
Pull the pulley assembly off the motor shaft (fan shaft) and remove.
Fig. 9-2
To mount the fan belt pulley, proceed as follows:
•
Position the pulley and bush so that these engage with one
another. Align both holes and insert screws without tigh-
tening.
•
Slide the pulley and bush on the shaft as close to the motor
or fan as possible (to keep leverage small) and align. (For ali-
gnment refer to „Re-tensioning or replacing V-belt“ on
page 64.)
•
Evenly tighten the hexagon-socket screws.
Fig. 9-3:
Installing fan belt pulley
•
Consider the maximum tightening torque of hexagon-socket screws during the
installation:
•
Check electric motors for dirt, damage, corrosion and secure mounting.
•
Inspect motor and fan for bearing noise, replace bearing if necessary.
•
Lubricate non-sealed fan bearing according to the motor manufacturer’s
recommendations (refer to Tab. 9-5)! Please refer to the manufacturer’s
documentation for correct lubrication details of non-sealed bearings.
•••
Centre lines
Hexagon-socket screws
for pulley fixation
Shaft
Bush
V-belt pulley
Tapped drill hole
for pressing out pulley
Bush Nr.
1008
1108
1210
1610
1615
2012
2517
3020
3030
3525
3535
Max. tightening torque (Nm)
5,6
5,6
20
20
20
32
50
90
90
115
115
Tab. 9-4 Maximum tightening torque
