ENGLISH
19
Thicker in the
middle
1.
Paint viscosity too high.
2.
Insufficient paint flow.
1.
Add solvent to reduce the viscosity.
2.
Increase the fluid flow.
Splashing
1.
Paint nozzle and paint needle are
not assembled properly.
2.
The first part of the trigger
movement, when only air passes,
is too small.
3.
Paint build-up in the air cap.
1.
Clean or replace the paint nozzle
and paint needle unit.
2.
Replace the paint nozzle and paint
needle unit.
3.
Clean the air cap.
R1: Tighten. R2: Adjust. R3: Clean. R4: Replace parts.
Problem
Affected
component
Component to check
Cause
Action
R1
:
R2 R3 R4
Air leakage
from the tip of
the air cap.
Air vent
Air vent
The seat is dirty or
damaged.
O O
Air valve seat
The seat is dirty or
damaged.
O O
Air valve spring worn
O
O-ring
Damaged
or
worn
O
Paint leakage Paint nozzle
Paint nozzle/paint needle
The seat is dirty,
damaged or worn
O O
Paint flow knob loose
O
Needle spring worn
O
Paint nozzle/spray gun
body
Not
tightened
sufficiently
O
The seat is dirty or
damaged.
O O
Paint
nozzle
seal
The needle does not
return, as the seal is
too tight
O
O
The needle does not
return, due to paint
build-up on the needle
O O
Paint needle
Needle seal/needle
Wear
O O
Seal
seat
Not
tightened
sufficiently
O
No paint flow
Spray gun tip Paint flow knob
Opening
too
small
O
Hole in the nozzle tip
Clogged
O
Paint
filter
Clogged
O O
Jula reserves the right to make changes. In the event of problems, please contact our service
department.
www.jula.com
