70
TK 61555-2-MM-EN
N
No
otte
e:: The belt tension frequency measurement should be the primary method used to determine
the correct belt tension. The markings on the tensioner arm and housing exist to provide a
rough visual reference of the belt tension.
Figure 49. Tensioner Mark Alignment
11. Monitor belt tension regularly during the run in period (initial 10 hours). After the belt has run
in, the mark on the tensioner arm should rest between the two marks on the tensioner
housing.
Fan Drive Belt Adjustment
The sliding idler pulley position is set during factory production for the correct belt tension. If
required, its position can be adjusted in the field to achieve the required tension as follows.
N
No
otte
e:: The distance given below is the nominal starting point and the exact location will depend
on the variation of the drive system layout.
1. Measure from the center of the sliding idler pulley bolt to the center of the end of the slot in
the frame as shown below.
Model
Nominal Setting Distance (|A-B|)
SLXi 30/50 Single Temperature
5 cm (2 in.)
SLXi 30/50 Spectrum
3.3 cm (1.3 in.)
