Invacare Tornado Service Manual page 43

Tornado
•
Prop the wheelchair up on the side that you
want to change the bearings on by placing
an object underneath the drive wheel.
•
Loosen and remove the 19 mm nut using
the socket wrench. Hold the wheel so it does
not rotate while removing the nut.
•
Pull the steering head shaft down and out of
the steering head tube.
•
Remove the washer and the bearing race
from the top of the tube. The other bearing
race should be on the shaft.
IMPORTANT REASSEMBLY INFORMATION!
The pictures show the wide rim on the outside of the bearing race
(A) and the narrow rim on the inside (B).
The bearings must always be assembled so that the narrow rims
are facing each other (inwards)! The steering head bolt and the
nut must always press against the wide rims from the outside!
Otherwise the bearings will be forced out apart by the pressure of
the bolt!
The steering wheels should swivel freely after assembly, but
there should be no play in the bearings.
•
First tighten the nut to 20 Nm +/- 2 Nm.
•
Loosen the nut a little.
•
Retighten to 15 Nm +/- 1.5 Nm
Page 42
Service Manual
As at:19.03.2004