Mattress and Seat Systems Service Manual
Repair
Page 44
11
Removing the Loop Base Sheet Assembly
Note:
On the Alpha Trancell II mattress overlay there is no loop base sheet assembly or individual,
replaceable cells. Instead, there is a one-piece manufactured item, the mattress overlay
assembly, which can only be replaced as a single, complete item.
All Mattresses (MR and OL) and Seat Systems, except Alpha Trancell II
11.1
Remove the top cover (Refer to Page 36, Section 3).
11.2
Remove the manifold assembly and all the cells from the loop base sheet assembly, as follows:
Note:
It is not necessary to remove the cells from the manifold assembly.
11.2.1
Pull apart the press studs that secure each end of the cell to the loop base sheet
assembly.
11.2.2
Pull the cell out through the loops in the loop base sheet assembly towards the
manifold side of the mattress.
11.3
Move the cells and manifold assembly out of the way, and remove the loop base sheet assembly
from the mattress or seat.
Alpha Trancell II Mattress Overlay only
11.4
Remove the top cover (Refer to Page 36, Section 3).
11.5
Carefully remove the 16 T-connectors on the manifold assembly from the mattress overlay
assembly (Refer to Figure 10).
Note:
The T-connectors are part of the manifold assembly.
11.6
Remove the mattress overlay assembly.
12
Installing the Loop Base Sheet Assembly
All Mattresses (MR and OL) and Seat Systems, except Alpha Trancell II
12.1
Lay the loop base sheet assembly onto the mattress or seat.
Note:
Refer to the relevant figure in this chapter to make sure the loop base sheet assembly
and the cells and manifold assembly are in the correct positions.
12.2
Install the manifold assembly and all of the cells onto the loop base sheet assembly, as follows:
12.2.1
Feed the cell through the loops in the loop base sheet assembly from the manifold side
of the mattress.
12.2.2
Connect the press studs that secure the ends of the cell to the loop base sheet
assembly.
12.3
Install the top cover (Refer to Page 37, Section 4).
Alpha Trancell II Mattress Overlay only
12.4
Lay the mattress overlay assembly next to the manifold assembly, with the CPR end plug
assembly at the head end of the mattress. Align the T-connectors on the manifold assembly with
the side-entry grommets on the mattress overlay assembly (Refer to Figure 10).
12.5
Carefully insert the 16 T-connectors on the manifold assembly into the side-entry grommets on
the mattress overlay assembly.
Note:
Installing the T-connectors into the side-entry grommets is made easier if the parts are
wetted with methylated spirit immediately prior to insertion.
12.6
Install the top cover (Refer to Page 37, Section 4).
