Huntleigh AlphaBed, Service Manual

Page: 59 / 94

36 Replacing the Pressure Control Assembly
Note : It is not necessary to remove the side panel assembly from the pressure control module.
36.1 Remove the pressure control module from the pump case as described in Section 29.
36.2 Remove the pressure control flaps as described in Section 35.
36.3 Release the control adjustment screw on the control knob arbour (Fig 20, Item 10).
36.4 Carefully remove the arbour, cam, spring cup and spring (Fig 20, Items 20, 30 and 40).
36.5 Renew/replace components with the same type.
Note : Early versions may have a nylon washer in lieu of the spring cup. Discard the washer and
replace with the cup.
36.6 Replacement is the reverse of the above procedure. Refit the pressure control flaps as
described in Section 35.
Note : The new control knob arbour will NOT fit the old pressure assembly module because of the
moulded wall on the old pressure assembly module. The old control knob abour will fit both.
Issue 2 Chap 3
Nov 2001 SER0004 Page 39
Mini Pump Service Manual Pump Repair