Hydrotech Classic Series Stenner Basic Service Manual - Manual (Page 25)

24 Maintenance Basics – Tube
5. Turn pump off.
6. Without moving the roller assembly further, lift the tube
fitting out of the housing slot and pull it toward the center
of the roller.
7. Turn pump on and allow roller assembly to jog while guiding
the tube with tension up and out of the housing.
8. Turn the pump off. Completely remove the tube assembly.