3
Cleaning the spray tip
1. If the spray tip clogs while spraying shut off pump and relief paint
pressure.
2. Loosen the retaining nut, for the spray tip, and release pressure slowly
before removing completely.
3. Then remove spray tip and put it in solvent.
4. Blow obstruction out with air from front of spray tip, or let it soak
long enough to dissolve the particle.
5. If it won’t dissolve, clean it with a Ecco cleaning broach from front
of spray tip.
Always remove spray tip from gun to clean it.
Be very careful when removing spray tip or hose from gun.
The pump must be switched off and paint pressure relieved.
A plugged high pressure hose contains fluid under high
pressure. Loosen tip retaining nut or hose coupling slightly and
release slowly before removing completely.
WARNING
Trouble shooting
Introduction
Always commence troubleshooting by checking the general condition
of the spray gun. This can most easily be determined by test spraying,
which provides an opportunity for checking the spray pattern and capacity
and gasket leakage.
The following external factors can cause malfunctioning and should be
thoroughly checked:
1. The quality of the paint, i.e. its viscosity, purity. etc.
2. The paint pressure in relation to viscosity of the paint and
spray tip used.
3. The size of paint hoses.
Trouble shoouting chart (see the last page)
Types of problems
Collection of information which makes it possible to identify the error
symptoms applicable to the spray gun in the event of malfunctioning
is a matter of vital importance. Identification of symptoms makes it
possible to decide whether the spray gun itself is the direct cause of the
malfunctioning or if this may have been caused by an external factor.
Replacement of fluid needle and fluid needle
gaskets
Removal
1. Shut off pump and relief paint pressure.
2. Undo the two screws (19).
3. Remove the servo part (14) by screwing out the back head (15).
4. Unscrew the sealing element (4).
5. Withdraw fluid needle (12) and take away the washer (5).
6. Unscrew the guide bushing (11).
7. Press the packing set out with the aid of the 5-mm pinprovided in the
tool set. Note! Take care to avoid damaging the outside diameter of
the packing screw (10) which is a sealing surface. Use the flats of the
packing screw when clamping between the jaws of a vice.
8. Clean and inspect all parts.
Assembly
All moving parts must be lubricated
1. Mount the packing set on the fluid needle (12) in the following order:
The washer (5), the guide (6), the packings (7) with the o-rings (8)
and finally the sleeve (9). Note! The packings (7) are to be fitted with
the tip of the Vee facing away from the valve cone in the fluid needle.
2. Screw the assembled sealing element (4) into the gun body.
3. Drip a little oil onto the sealing surface of the packing screw and mount
the servo part (14).
4. Secured the fluid needle with the two lock screws (19).
Replacement of fluid needle only
1. Unscrew the retaining ring (29) and remove the spray tip (28) together
with its gasket (27)
2. Uns crew the fluid nozzle (3) with its gasket (2).
3. Undo the lock screws (19) and pull the fluid needle (12) out from the
front.
4. Insert a new fluid needle and tighten the lock screws (19).
5. Fit the fluid nozzle (3) and spray tip (28). Don’t forget to refit the gaskets
(2 and 27).
• Max. fluid pressure 360 bar.
• Fluid hose connection 1/4-18 NPSM.
• Min./Max. control air pressure 4/8 bar.
•Control air tube connection is elbow coupling for 6/8 mm nylon tubing.
• Blow the fluid and air tube clean before connecting them.
• When assessing the reaction time of the connected spray gun
(the time from the start impulse until spraying commences) the
reaction time of the control valve must be taken into consideration.
•Recommended sizes for control valve and air hoses:
– Control valve, 3-way, G1/4. Min. flow area 28 mm2.
Mechanically, pneumatically or electrically actuated.
– Air hose, nylon, dia. 6/8 mm, max. Iength 7.5 m for control air.
• To prevent the fluid hose from getting stuck on account of dried
paint, it is recommended that the connection threads be greased
with vasseline or a similar lubricant.
• Take great care to keep the spray gun clean and to lubricate all
moving parts at regular intervals.
• Lubricants for paint spraying equipment must not contain silicones.
• Check that all connections are tight.
• If the gun does not work satisfactorily it must on no account be used.
Repair or replace it immediately.
Paint spraying
Advice on high-pressure spraying
1. Consult your paint supplier for information to choose the correct
spray tip for the actual paint.
2. As rule the best spraying distance is 30-40 cm.
3. The spray passes do not need to overlap as much as in spray painting
with air atomization.
4. The capacity of high pressure spraying is very large. To avoid runs, the
spray gun should usually be moved faster than in spray painting
with air atomization.
Maintenance
The entire spray gun gun should be cleaned at the end of each working
day. The spray tip should be cleaned more frequently.
Wipe the spray gun thoroughly clean on outside and clean it internally by
flushing a suitable solvent through it.
More extensive cleaning and overhauling should be carried out at least
once a month, depending on the material being sprayed.
