Mattress and Seat Systems Service Manual
Repair
Page 47
17.2.2
Remove the two ends of the turn valve from the manifold tubes.
17.2.3
Carefully insert the two ends of the new turn valve into the manifold tubes.
17.2.4
At the feet end of the mattress, lay the base cover assembly and loop base sheet
assembly (including cells) back in their correct positions.
17.3
To replace the valve at the head end of the mattress:
17.3.5
At the head end of the mattress, on the manifold side, move the base cover assembly
and loop base sheet assembly (including cells) out of the way to reveal the turn valve
by the CPR end plug assembly.
17.3.6
Remove the end of the turn valve from the tube.
17.3.7
Carefully insert the end of the new turn valve into the tube.
17.3.8
At the head end of the mattress, lay the base cover assembly and loop base sheet
assembly (including cells) back in their correct positions.
17.4
Install the top cover (Refer to Page 37, Section 4).
18
Press Stud Replacement
Depending on the particular mattress or seat system being repaired, the press stud parts fitted to it are
either plastic or metal. Make sure that the new press stud parts are of the same material as the old press
stud parts being removed (Refer to Table 18).
Note:
Do not mix metal and plastic press stud parts on the same mattress or seat system.
18.1
Make sure that the two halves of the die set (Fig 27, Item 20) are installed in the jaws of the
hand press tool (Fig 27, Item 10).
18.2
Remove the old press stud parts from the mattress, if necessary using side-cutters, taking care
not to damage the mattress fabric.
18.3
Place the new stud post (Table 18, Item 30) in the location hole in the assembly where it is to be
fitted.
Note:
Check with similar studs for the correct position.
18.4
Position the stud post and assembly in the hand press tool.
18.5
Depending on which is to be fitted, fit a stud cap (Table 18, Item 40) or stud socket
(Table 18, Item 50) onto the stud post, and firmly squeeze the handles of the hand press tool
together.
18.6
Remove the secured press stud assembly from the hand press tool.
Note:
Make sure that the stud assembly (comprising a stud post and stud cap or socket) is
installed correctly. The stud assembly should grip the material and not rotate freely.