Maintaining Correct V-Belt Tensioning on Rubble Master Crushers

Maintaining Correct V-Belt Tensioning on Rubble Master Crushers

Importance of maintaining the correct V-belt tension:
Too high a V-belt tension will overload the generator bearings and may cause major generator failure, which is costly to repair.
Too low a V-belt tension can allow V-belt slippage, which damages the belt and pulleys, resulting in avoidable downtime.

How to correctly test belt tension?

Tools required:

• Tension meter Otikrik 0–1500 N.m (Part number: 212024)
• Available from our PartsLink department at Pilot Crushtec International
• For more information, enquire here

1. Open the compartment door on the Rubble Master machine.



Figure 1 – Compartment that needs to be opened

2. Isolate the machine (remove isolator key and disconnect battery).
3. Remove the generator V-belt cover.



Figure 2 – Generator V-belt guard to be removed

4. Set the tension meter to 1500 N.m.
5. Slide the tension meter onto your finger, then place it on the centre span of the V-belt between the two pulleys.



Figure 3 – Tension meter set to 1500 N.m

6. Press your finger down until the tension meter “clicks.”
7. Remove the tension meter carefully and read the value.



Figure 4 – Reading the tension meter at click point

8. The tension required on the generator V-belts is:
• Maximum: 960 N.m
• Minimum: 500 N.m

Adjust V-belt tension if necessary and check pulley alignment.



Figure 5 – Proper pulley alignment