Bertolini GIARDINAGGIO Serie Manual De Uso Y Mantenimiento página 65

The pulley Ø must be adequate. Avoid excessively small Ø (<50 mm). Increase the Ø of
the pump pulley if necessary.
If small pulleys are used, the belt could slip and therefore lead to incorrect power
transmission.
BERTOLINI PULLEYS:
CODE
31.0255.97.3 PA 730-830 VC-VM-VF
31.8933.97.3 PA 730-830 VC-VM-VF
31.8671.97.3 PA/S 908 VM
31.8672.97.3 PA/S 908 VP - POLY 2073 VP
31.8463.97.3 PA/S 908-1108-124-144-154 VD
PPS VD
POLY 2180-2210-2250-2260-2300
31.8907.97.3 POLY 2116-2136 VA
31.8843.97.3 POLY 2073-2116-2136
The TYPE column indicates the belts types that suit the different pulleys:
e.g. 3A means 3 grooves type A.
You are advised to comply with the following rules in order to install the belts
correctly:

Remove any oil or grease residues from the pulleys

Remove any rust and burrs

Do not attempt to force the belts into place

Align the pulley races as shown in the figure:

As shown in the figure, do not position the pulleys in a misaligned
way.
PUMP MODELS TYPE ØP (mm)
2A 250
2A 350
3A 310
3A 310
3A 310
2A 250
2A 250
B (mm)
35
35
56
56
56
35
35
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