Invacare Ben 9 Plus, Maintenance & Spare Parts Manual

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MAINTENANCE
Page 2.7
04/02
2.1 Removing And Replacing The Backrest Canvas
General
1 Check the backrest canvas (1) and push handles (3) for any defects, (refer to paragraphs 4 and 5). If any
defects are observed then refer to paragraphs 6 to 7 for maintenance details and to Chapter 3 for parts
information.
2 Ensure that the push handle locks securely into place 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..
4.4 Cup washers not missing.
5 Inspect the locking mechanism for the following:
5.1 Release 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
6 To remove or replace the backrest canvas (1) proceed as follows:
6.1 Unscrew and remove the six pozidriv head countersunk screws (7) and cup washers (8).
6.2 Unscrew and remove the two button head pivot bolts (5), Nyloc nuts and washers.
6.3 Hold the push handle (3), and slide the lower half of the backrest canvas (1) off.
6.4 Remove plunger (4) and plunger knob (6).
6.5 Hold the backrest canvas and slide the push handle out.
Replacing the backrest canvas
7 To replace the backrest canvas is the reverse of the removal, however ensure the following:
7.1 New Nyloc nuts are fitted.
7.2 The securing points are undamaged.
7.3 New washers are fitted as required.
7.4 That the backrest canvas is stretched evenly and is taut.