30
31
The mortar is too dry
The delivery valve is blocked
because of faulty mix
Blocked mortar hose
Blocked mortar by-pass
Mortar too poor in cement or lime
Dirty valve’s group
Bent mortar hose
Too small deflector
Sand with aggregate size too large
Mortar too poor in cement or lime
Suction valve’s group dirty or
blocked
Dirty or worn ball valve’s
Dirty or worn valve’s seats
The safety device activates
frequently
The spraygun blocks continously
The pump does not engage
• Make it more fluid by adding water.
• Wash the delivery valve (page 21)
and modify the mix (page 13).
• Find the blockage and remove it
(page 28).
• Clean the mortar by-pass.
• Check the mix design and even-
tually modify it (page 13).
• Clean the suction and delivery val-
ve’s group (page 29).
• Find the place where it is bent and
make it straight.
• Change the deflector with a larger
size one.
• Use sand finer granulometry
curve.
• Increase the q.ty of binder. Refer to
the mix design (page 13).
• Wash the suction valve’s group.
Make sure that there are no hard
material on the valve or on the ins-
pection plug (page 26).
• Clean the ball valves (page 21). If
the are worn, please replace them
(page 25).
• Clean them and eventually replace
them (page 26).
• Replace the piston (page 26).
I
NCONVENIENTS
C
AUSES
R
EMEDIES
Summary of Contents for UNI 30 D
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