Invacare Celt Plus, Maintenance And Spares Parts Manual, Page: 15 / 78

11/03 Page 2.7
MAINTENANCE
2.1 Removing/Replacing Backrest Canvas/Pushhandles
General
1 Check the (Fig 2.1.1) Backrest Canvas (1) and Push Handle (3) for any defects, (refer to paragraphs 4 and
5). If any defects are observed then refer to paragraphs 6 to 10 for maintenance.
2 Ensure that the push handle locks securely and that the locking mechanism functions correctly.
Tools
3 Refer to the tool list at the beginning of this Chapter.
Inspection
4 Inspect on a weekly basis for the following:
4.1 No signs of sagging, stretching or excessive wear in the Canvas (1).
4.2 No evidence of fraying, especially around the fastener points.
4.3 Pozidriv Head Screws (5) not missing and are tight.
4.4 Cup Washers (4) not missing and are tight.
5 Inspect the locking mechanism for the following:
5.1 Levers are not deformed or damaged.
5.2 Locks safely when the Push Handle (3) is in the upright position.
5.3 Not excessively stiff to operate (action should be smooth and positive).
Removal of the backrest canvas/pushhandles
6 To remove the Foldable Backrest (Fig 2.1.1) Canvas (1) proceed as follows:
6.1 Release the Plunger Knob (6) and fold the Push Handle (3) down.
6.2 Unscrew and remove the four Pozidriv Head Screws (5) and Cup Washers (4).
6.3 Unscrew and remove the two Bolts (8), Nyloc Nuts (9) and Plain Washers (10).
6.4 Unscrew and remove the two Plunger Knobs (6).
6.5 Slide the Backrest Canvas (1) off the Push Handle (3).
6.6 Slide the Backrest Canvas (1) off the lower half of the Back Frame (11).
7 To remove the canvas from the fixed backrest (Fig 2.1.2) proceed as follows:
7.1 Release the plunger operated lock in both rear vertical frame tubes and pull the complete backrest
out of the chassis.
7.2 Remove the pozihead screws (4) and washers (3) from both sides of the Backrest Tube (5) and
slide the canvas (6) off the backrest frame.