Edwards nES Series, Instruction Manual, Page: 46 / 56

▪ Install the tension meter as shown in picture 1, in the middle, halfway between the
V
‑
belt contacts point of the V
‑
belts and the two pulleys.
▪ Push the Newton scale's black rubber down to reach a 10 mm bending of the
V
‑
belt as shown in pictures 2 and 4.
Figure 23 Belt tensioning
1. Set the o-ring to 10 mm position.
2. Place the tool on the centre of the longest V
‑
belt and mark the belt.
3. Push the tool downward until you reach a 10 mm bending. The result of the
measurement should be between 35 N and 58 N.
4. Check the result of your measurement. Tighten the belt tightener to reach the
value given in the table:
Belt
tension
Before
run
‑
in
Re
‑
tightening
(after 10 to 24 h)
Regular check (approximately 6 months
or 3000 h) Value under which a
re
‑
tension is necessary
F (kg) F (kg) F (kg)
All pumps 5 4.5 3.5
Always measure on the same belt.
Note:
Do not loosen a belt if the measurement is over the values shown. In this instance, do not
change the V
‑
belt tension.
Page 42 - 07/2020
A35104880_B - Adjustments and servicing procedures