ET 66 - ET 66 M operator’s manual
GB
USING WHEEL CENTRING ACCESSORIES
Flanges for centring standard truck wheels
The following components are available:
- Stepped flange with 220 and 280 mm diameter for rear pre- centring of bus and heavy
haulage wheels. Stepped flange with 160, 176 and 200 mm diameters for rear pre-
centring of truck, trailer and van wheels.
- Counter-flange with holes for installing taper pins.
- Standard set of five taper pins for centring wheels with fixing holes from 18 to 35 mm
diameter
- Standard set of five “maxi” taper pins for centring wheels with fixing holes from 28 to
47 mm in diameter.
The procedure for wheel centring using the above components is as follows:
- fit the correct stepped flange for the type of wheel and secure it to the balancer
flange by tightening the two screws;
- insert the RFT gauge pins into two adjacent fixing holes on the wheel (fig.6);
- read off the diameter of the hole circle and
the number that identifies the corre-
sponding holes on the counter flange (e.g. 225; 6) on the gauge data plate scale
relative to the number of fixing holes of the wheel in question (e.g. 10);
- insert the correct taper pins (standard or maxi type) for the diameter of the fixing
holes into the counter flange. The pins must be fitted so that the nuts are on the
numbered size of the counter flange;
- fit the wheel on the spin shaft as described in the next heading (using the wheel lift)
making sure that the centre hole of the wheel fits over the correct step on the flange.
Note
The rear fitment of the wheel on the stepped flange is a pre-centring operation and it
is therefore quite normal to have some free clearance between the rim of the centre
hole and the flange step.
Final wheel centring is achieved using the taper pins!
- Fit the counter flange by inserting the taper pins in the wheel fixing holes;
- clamp the wheel and the counter flange by tightening the spinner fully.
The following table shows wheel characteristics with indications of the corresponding
pre-centring diameters on the stepped flange.
stepped wheel centre N° and ø of
flange ø hole ø wheel fixing holes
(mm) (mm) (mm)
160 161.1 6x205
161 6x205
163.5 6x222.3
164.3 6x222.3
176 176 10x225
200 202 6x245
220 220.1 10x285.75
221.4 10x285.75
221.5 10x285.75
221 8x275
221 8x285
280 281 10x335
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