11/2008
Chicago Pneumatic Compressors
Page 32
62 305 549 65
24.0 BELT TENSION
BEFORE CARRYING OUT ANY MAINTENANCE THE COMPRESSOR MUST BE STOPPED, DISCONNECT THE
COMPRESSOR FROM THE MAIN POWER AND FROM THE COMPRESSED AIR DISTRIBUTION NETWORK,
CHECK THAT THE COMPRESSOR IS NOT UNDER PRESSURE.
Tightening or retightening belts
Proceed as follows:
- Press the “STOP” button Ref. 1 Fig. 20.
- Switch off the compressor
- Turn off main power and lockout disconnect Ref. 3 Fig. 20.
- Remove the panel Ref. 4 Fig. 20.
- Loosen the screws by half a turn Ref. 5 Fig. 20
- Loosen the locknut Ref. 6 Fig. 20
- Adjust the belt tension by turning the nut Ref. 7 Fig. 20.
- Lock the locknut again Ref. 6 Fig. 20
- Close the screws again Ref. 5 Fig. 20
- Fasten the panel with its safety screws Ref. 4 Fig. 20.
HP 40 - 50 - 60
F = 7.7 lbs.
Force to be applied at the center line, at right angles to the new belt.
f = 0.24 in
Clearance after the application of F. (after 100 hr operation F = 5.5 lbs.)
24.1 TIGHTENING TORQUE (Fig. 21)
Type bush
Tightening torque
lbs/ft
Key
2012 22.88 5
2517 35.42 6
3020 66.42 8
3535 82.66 10
FIG. 21
TYPE
FIG. 20
5
7
f
F
5
1
2
3
4
6