SERVICE MANUAL
E-20
D.2.3 Taper roller bearings preload
1. If parts as trumpet or wheel axle are not replaced, use shims collected during
disassembly. Check correct preload.
2. If trumpet or wheel axle are to be replaced, proceed
as follows:
- start with a packet of shim (13) 1 mm each;
- assemble washer (14) and screw (15);
- tighten screw (15) to prescribed torque.
See: fig.3 and sec. C.4.
SHIMS RANGE
Thickness - mm 0.05 0.10 0.30 0.50
Quantity --- --- --- ---
3. Measure preload P of the taper roller bearings with a dynamometer whose cord is wound on the wheel axle (1).
The real preload P is measured on D= 245 mm and it must be within following range:
P= 13-20 N
If P < (13-20) N, remove shims.
If P > (13-20) N, add shims, choose them from the range available, so as to observe prescribed preload.
See: fig.4, 5 and 6.
Fig.3 Fig.4
Fig.5 Fig.6
ITL
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