6.2 Service and Adjustment of Control Unit (Cont.)
13. Using a 5/16” socket wrench with extension, loosen the (4) hose clamps on
the (2) control tubes (note position of hose clamp bolts). Use a flat head
screwdriver to gently pry one end of the control tube off of the barbed fitting.
Gently rotate, while pulling, to remove the control tube from the other end
(repeat for other tube).
Note: picture shown without cylinder assembly for better viewing.
DO NOT remove cylinder assembly.
14. Check the control tubes for wear, damage, or foreign material that may stop
them from being pinched completely closed at the center. (A small round
nylon bristle brush or pipe cleaner can be used to clean the inside of the
tubes). REPLACE IF NECESSARY. Note: control tubes will need to be
replaced as a normal part of routine maintenance. Their life span is
dependent on air pressure setting, volume of soda and the number of on/off
cycles.
