Invacare AVIVA RX Series Service Manual page 42

Invacare® AVIVA™ RX series
Removing:
1. Place wooden block underneath mobility device and
prop up mobility device.
2. Remove front part of main frame shrouds. See 6.7.3
Main Frame Shrouds, page 25.
3. Loosen and remove nut A including washer B.
4. Remove fork E downwards.
5. If necessary, remove ball-bearings C and D.
If needed, use hammer and parallel pin punch to drive
bearing out of housing. Hit outer ring of bearing.
Installing:
CAUTION!
Incorrect reassembly can damage bearings and cause castors to come off
Single-row angular ball bearing rings are not identical on both sides. There is only one correct way to insert them.
– Bearings must always be installed so that narrow borders of the ball bearings are facing each other (inside).
– Steering head bolts and nuts must always be pressing against wide (outside) border of ball bearings.
Otherwise, bearings will be pressed apart and damaged by bolts.
The illustrations show the wide border of the ball bearing
on the outside of the ball race A and the narrow ball
bearing edge on the inside B.
1. Install parts in reverse order. Tighten nut A to
14±1 Nm.
2. Check all moveable parts for ease of movement.
After installation, castor should rotate freely but
bearings should have no play.
3. Re-install shroud.
4. Test all functions.
42
Fig. 6-32
Fig. 6-33
Fig. 6-34
1654647-B