Invacare Celt Plus, Maintenance And Spares Parts Manual

Page: 31 / 78

11/03 Page 2.23
MAINTENANCE
2.5 Removing/Replacing A Castor Wheel Assembly
General
1 Check the castor wheel assembly for any defects (refer to paragraph 4). If any defects are observed then
refer to paragraphs 5 to 7 for maintenance details and to Chapter 3 for parts information.
2 It is not intended that any other part is maintainable.
Tools
3 Refer to the tool list at the beginning of this Chapter.
Inspection
4 Check the following:
4.1 Castor Fork is not distorted and is undamaged.
4.2 Tyre is not cracked or excessively worn.
4.3 Castor Wheel rotates freely when lifted clear of the ground and spun.
4.4 Alternatively, Pivot the castor Fork through a 90 degree arc, so that it is in a horizontal position. Allow
the Fork and Wheel to drop. The assembly should swing 2 to 3 times and come to rest in a straight
downward position.
4.5 The tyre is firmly fitted and concentric within the rim.
☞
Note: In the event of failure in any of the above, the assembly must be removed and replaced.
4.6 Castor assembly is firmly located and secure.
Removing A Castor Wheel Assembly
5 To remove the castor wheel assembly proceed as follows:
5.1 Raise and support the front end of the chair. This can be achieved by tipping the chair back.
5.2 Using an adjustable spanner unscrew the Fork nut until the castor assembly releases from its location.
5.3 Remove the castor wheel assembly.
5.4 Check that the castor wheel location is undamaged and clean.
Replacing A Castor Wheel Assembly
Caution: Apply Loctite 242 or equivalent to the thread of the castor wheel shaft and ensure that
the castor wheel is tightened using the Fork nut to a torque of 30 lbf.ft.
6 Replacing the castor wheel assembly is the reverse of the removal; ensure the following:
6.1 It is firmly located, secure and undamaged.
6.2 Freely rotates through 360 degrees. Refer to paragraph 4.3.
7 Once correctly fitted, remove the support (if used) and allow the chair to sit on all four wheels. Check that it
functions correctly.