Ikelite D90 Instruction Manual page 24

Control Shaft
Tighten set screw down
against this flat area
when replacing the knob.
Housing
24
Diagram A
Housing
Lubricate end of shaft
before reinserting into
gland
Diagram B
Lubricate Shaft
Gland
Loosen set screw
(allen wrench required)
Pull out to
expose shaft