Edwards nES Series, Instruction Manual, Page: 45 / 56

7.4 Cleaning radiator, motor fan guard and pump
The radiator, motor fan guard and pump must be kept clean. This can be done using
compressed air and a dry cloth. Be careful not to damage the oil cooler (if applicable) by
cleaning with compressed air or by exerting excessive pressure with the cloth.
Do not use fluids or substances other than those indicated.
7.5 Replacing V - belts
In normal operating conditions, the belt has a lifetime of 30,000 hours. Wear can be
detected by slip, abnormal wear or cracks. In case of wear, the correct alignment of the
pulleys must be checked. Tolerance ± 1.3 mm.
Note:
A dismounted belt must be replaced with a new one.
nES470/570
Tools required: Key 19 and 24.
1. Take off the hood.
2. Loosen the applicable nuts.
3. Remove the belt.
4. Replace the belt.
5. Reassemble in reverse sequence.
nES630/750
Tools required: Key 19 and 24.
1. Take off the hood.
2. Loosen the applicable nuts.
3. Loosen the pushrod.
4. Remove the V belts.
5. Replace the belt.
6. Reassemble in reverse sequence.
7. Stretch the V-Belts with the V-belt tension meter.
Refer to V-belt tensioning on page 37 V-belt tensioning on page 41 for details.
7.6 V-belt tensioning
7.6.1 How to use the v-belt tension meter
▪ The tension meter is a tool designed to check and re
‑
tighten the V
‑
belts. It is made
of two sliding pipes with a graded spring inside.
▪ Refer to Figure: Belt tensioning . Set the first o-ring at 1 mm (PIX) on the millimetre
scale or 25 inches of span, as shown in picture 3, and the other o
‑
ring on position 0
on the Newton scale.
07/2020 - Page 41
A35104880_B - Adjustments and servicing procedures