WAGNER Super Finish 21 Mode D'emploi page 39

type of malfunction
unit exerts suction but no build-
up of pressure takes place
unit exerts pressure and reaches
pressure. If the spray gun is
removed, the pressure falls ap-
preciably
Hard pressure jolts and excessive
vibration on the spray gun and
unit
Super Finish 21 • 23
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possible cause
•
Air in the hydraulic system
•
No tip in the spray gun
•
Tip too large
•
Suction filter clogged
Specially for unit with suction system:
•
Suction pipe not tight
•
Outlet valve parts worn
•
Relief valve does not close. Coating
material escapes from the return pipe.
•
High-pressure hose for diaphragm
unit not suitable
•
Outlet valve parts worn
Remedy in case of disturbance
Measure for elimination of mal-
function
•
Release air from unit (hydraulic system),
i.e. turn pressure regulating valve
three revolutions to the left. Allow
the unit to run one or two minutes.
After that, turn pressure regulating valve
to the right to set the desired operating
pressure.
•
Mount tip.
•
Selection of smaller tip, see page 47, point
13.4.
•
Clean suction filter or replace.
•
Clean and tighten connection points.
•
Replace outlet valve parts, see page 39,
point 11.2.
•
Screw out relief valve from paint section and
clean or replace, see page 39, point 11.4.
•
Use original WAGNER high-pressure hose.
•
Replace outlet valve parts, see page 38,
point 11.2.
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