Corghi ET88 Manual De Uso página 99

surface is touching the tyre.
Important
In this condition, push the lever in the · UP direction for a moment longer so that
the lift surface is pressed slightly against the tyre, to compensate for the slight
lowering of the wheel caused on release due to the elastic effect of the pneumatic
cylinders.
- Release the wheel by removing the locking ring-nut and the counter-flange;
- pull the lift outward until the entire wheel is removed from the shaft (to allow it to
be lowered);
- lower the lift completely by moving the control lever in the DOWN direction;
- Unload the wheel from the support surface.
BALANCING ACCESSORY
AVAILABILITY STATUS
This check allows the user to make sure that wear has not altered the mechanical
specifications of flanges, cones, etc., beyond the specified limits.
A perfectly balanced wheel, removed and replaced in a different position, cannot
show an imbalance of over 10 grams for car wheels and 100 grams for truck wheels.
If the imbalance is higher, check all the accessories with care and replace any that
show dents, abnormal wear, bent flanges, etc.
Always remember that if you are using a cone to centre the wheel on the shaft, you will
never obtain good results if the hole in the rim is not perfect, i.e.: off-centre or out-of-
round. Results are always better when the wheel is centreed with the rim holes.
It should be remembered that any difference between the way the wheel is mounted
on the vehicle and the way it is mounted on the balancing machine will undoubtedly
generate a certain degree of imbalance.
This can only be eliminated with "on vehicle balancing", using a finishing balancing
machine to complement the work on the bench balancing machine.
ET 88 operator's manual
GB
99