A
A
C*
* NEVER LOOSEN
A 
B
SPAN LENGTH
DEFL. FORCE
FIGURE 22 - BELT ADJUSTMENT
Procedure for adjusting belt tension:
1.Loosen six nuts (top and bottom) A.
2.Adjust by turning (B).
3.Never loosen nuts (C).
4.Use belt tension checker to apply a perpendicular force to one belt at the midpoint of the span as shown. Deflection distance of 4mm (5/32”) is obtained.
To determine the deflection distance from normal position, use a straight edge from sheave to sheave as reference line. The recommended deflection force is as follows:
Tension new belts at the max. deflection force rec- ommended for the belt section. Check the belt ten- sion at least two times during the first 24 hours of operation. Any retensioning should fall between the min. and max. deflection force values.
5. After adjusting retighten nuts (A).
Unitary Products Group | 23 |