Gorman-Rupp Pumps 54J20-B 1410811 and up - Manual (Page 14)

50 SERIES OM-01342
PAGE B - 7 INSTALLATION
Place the tension tester squarely on the belt at the
center of the belt span. Apply force on the plunger,
perpendicular to the belt span, until the bottom of
the large O‐ring is even with the top of the next belt,
or with the bottom of a straight edge laid across the
sheaves.
Read the force applied from the bottom of the small
O‐ring on the deflection force scale. Compare this
force with the value shown in Table 1 or 2 and ad­
just the tension accordingly. Note that the tension
for new belts is higher than that for used belts to
allow for expected belt stretching. Do not over‐ten­
sion used belts to the higher deflection forces
shown for new belts.