Troubleshooting And Fault Rectification; Conversion And Repair; Cleaning And Maintenance Basic Cleaning - SIMALFA Primus Instrucciones De Servicio

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Troubleshooting and fault rectification

Warning
Before each change-over depressurize the spray air as well as the material supply
to the spray gun - risk of injury.
Fault Cause
Gun drips Material needle or nozzle dirty
or damaged
Needle seal (item 7) contami-
nated or damaged
Spring cap (item 13) turned
too far back
Pulsating or insufficient material in the
shimming spray material container
beam
Cup is tilted too much during
the spraying process
Material nozzle loose or dam-
aged
Gun emits spray Valve spring (item 25) or valve
in idle position cone (item 24) damaged
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Conversion and repair

If you want to change the spray pattern beyond the options already mentioned, the
spray gun must be converted. The air cap / material nozzle / needle combination
matching the spraying material represents an interactively tuned unit - the nozzle
insert. Always replace the entire nozzle insert to maintain the desired spray pattern
quality.
Warning
Interrupt the air and material supply to the spray gun before each conversion or
repair - risk of injury.
Note
Please refer to the exploded view (Page 6) of these operating instructions to per-
form the work steps listed below.
Changing the material nozzle and air head
1. Unscrew the air head nut (item 1).
2. Remove the air head (item 2).
3. Unscrew the material nozzle (item 3) with a wrench size 11 from the gun body.
Note
The assembly of the new nozzle insert as well as of the remaining components
takes place in reverse order.
Remedy
• Clean or replace
• Needle seal replace
• Slightly turn down the adjust-
ment screw (clockwise)
• Refill the material
• Hold straighter
• Tighten, if necessary, replace
air distributor ring (Item 5)
• replace
30
Changing the material needle
1. Unscrew the spring cap (item 13).
2. Remove the needle spring (item 12).
3. Pull the material needle (item 9) out of the gun body.
4. Loosen the counter screw (item 11) from the driving bushing (item 10) and
unscrew the material needle.
Assembly takes place in reverse order.
Note
The needle setting for the SIMALFA Primus (MA upper) is X = 69,5 mm and for the
SIMALFA Primus (MA lower) X = 78,0 mm from the needle tip to the driving bush-
ing.
Replacing a leaking needle packing
1. Remove the material needle as outlined above.
2. Unscrew the packing screw (item 8) from the gun body.
3. Unscrew the lever shank screw (item 32) and the lever screw (item 30) and
remove the trigger (item 31).
4. Remove the needle seal (item 7). You may need to use a thin wire with the
end bent to a hook.
Assembly takes place in reverse order.
Attention
The needle pack taken from the gun attachment may not be reused since a reliably
functioning sealing effect is no longer ensured.
Note
All moveable and sliding parts should be lubricated with a non-acidic, non-resino-
genic lubricant prior to assembly, we recommend the ALFA Hand Cleaner for the
maintenance of the spray gun.
9 Cleaning and maintenance
9.1 Basic cleaning
The spray gun must be regularly cleaned and lubricated in order to enhance its
service life and ensure the functionality of the spray gun.
Attention
Never place the spray gun in solvent or another cleaning agent. The perfect func-
tion of the spray gun can otherwise not be guaranteed.
Attention
Do not use any hard or pointed objects for cleaning. Otherwise, precision parts on
the spray gun can be damaged and and affect the functionality.
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