ET 66 - ET 66 M operator’s manual
Flanges for centring TRILEX truck wheels
The following versions are available:
- Adapter flange for centring wheels with Trilex, Monolex and Unilex (tubeless) wheels
diameter 20" and 22.5", angle 18°, typical European standard wheels (FISCHER
triplex).
- Adapter flange for centring wheels with Trilex, Monolex and Unilex (tubeless) rims
diameter 20" and 22.5", angle 28°, typical US standard wheels (DAYTON) though also
present in Europe.
- Adapter flange for centring wheels with Trilex, Monolex and Unilex (tubeless) rims
diameter 24" , angle 28°, typical US standard wheels (DAYTON).
Note
The diameters specified above refer to the outside circumference of trilex rims; the
diameter of the wheel spoke disc is clearly different and may be identical for rims with
different diameters (e.g. 20" and 22.5").
The procedure for centring a wheel using the above components is as follows:
- remove the threaded part of the shaft (threaded hub). This restricts horizontal
movement of the wheel lift carriage (used to mount the wheel) and avoids possible
interference between the wheel lift and the flange arms;
- fit the correct trilex flange for the type of wheel in question and secure it to the
balancer flange using the two screws;
- install the wheel on the spin shaft as described in the following heading (using the
wheel lift), taking care that the rim is inserted properly over the flange;
- secure the wheel on the flange by positioning the clamps appropriately on the rim
edge and fully tightening the clamp screws to the flange spokes.
Note
Because of the assembly imprecision found in this type of rim, the wheel must be
centred on the flange very carefully to obtain satisfactory balancing results.
Taper pins for centring truck wheels
The following components are available:
- medium double cone for centring wheels with centre hole:
• from ø 160 to ø 165 and ø 176 on small side;
• from ø 200 to ø 202 on large side;
- large double cone for centring wheels with centre hole:
• from ø 220 to ø 222 on small side;
• ø 281 on large side;
- double-sided distance ring for use with the above cones.
The procedure for centring a wheel using the above parts is as follows:
- fit the distance ring to the balancing machine so that the outer side is the smaller of
the two, if you intend to use the medium cone, or the larger of the two if you are
using the large cone;
- secure the distance ring to the balancer flange using the two screws;
- fit the wheel on the spin shaft as illustrated in the next heading (using the wheel lift).
Do not lower the wheel lift!
- fit the cone on the spin shaft with the side suitable for the diameter of the wheel hole
facing toward the wheel;
- fit the spinner and tighten it fully so that the wheel is properly clamped;
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