CompAir UK Ltd
PUBLICATION APP012-5280
Page 2
App012-5280.doc
ADJUSTMENT METHOD
If the belt tension is incorrect, correct it by using the adjusting screw provided, using a suitable straight edge
(long enough to span both pulleys) established the correct deflection and pulley alignment.
Method of Belt Tensioning. Using a Belt Tension Indicator.
1.
Measure small pulley diameter (motor)
2.
Calculate the deflection distance in mm on a basis of 16 mm per metre of span.
Centre distance (metres) X 16 = Deflection (mm). If distance & deflection is known, go to 3.
3.
Set the lower marker ring at the deflection distance required in mm on the lower scale.
4.
Set the upper marker ring against the bottom edge of the top tube.
5.
Place the belt tension indicator on top of the belt at the centre of span and apply a force at right
angles to the belt deflecting it to the point where the lower marker ring is level with the adjacent
belt, on single belt drives place a straight edge across the two pulleys to act as a datum.
6.
Read off the force value indicated by the top edge of the upper marker ring.
7.
Compare this force to kgf value shown in the table 1 above.
8.
Tighten or loosen belt tensioner to achieve the correct value.
9.
If the measured force falls within the values given, the drive should be satisfactory.
Note:-If a belt tension indicator is not available, a suitably scaled spring balance and rule will suffice.
10
20
30
40
50
60
mm
Deflection in
mm
14
12
10
8
6
4
2
Deflection Force in
kgf
Summary of Contents for 5280D.1.IAC
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Page 44: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 38 1440 doc CRANKCASE 1...
Page 46: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 40 1440 doc CRANKCASE 2...
Page 48: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 42 1440 doc CRANKCASE 3...
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