Jefferson JEFA048 User manual

HVLP GRAVITY SPRAY GUN
User Manual
JEFA048
www.jeffersontools.com

2
USER MANUAL
HVLP Gravity Spray Gun
JEFA048
2. Parts Identification
1. Contents
Parts Identification
Box Contents
Specification
Operating Instructions
Cleaning & Maintenance
Troubleshooting
2
3
3
3
4
5
No. Description Qty
1 Air Nozzle W/Brass Cap 1
2 Fluid Nozzle 1
3 Air Diversion Ring 1
4 Piston Pad 1
5 Screw 1
6 Seal for Air Piston 1
7 Compression Spring for Needle Seal 1
8 Washer 1
9 Gun Body 1
10 Fluid Control Knob 1
11 Spring for air piston 1
12 Screw nut 1
13 Fluid Control Knob 1
14 Stuffing box for air piston 1
15 Gasket 2
16 Air piston assembly 1
17 Piston ring 1
18 Air piston assembly 1
19 Spring for air piston 1
20 Spindle assembly 1
21 Control kn ob 1
22 Counter screw 1
23 Air Adjust Valve Ass'y 1
24 Air Connection piece R¼" 1
25 Trigger bolt 1
26 Locking plate 1
27 Bolt 1
28 Trigger sleeve 1
29 Trigger 1
30 Paint connection 1
31 Filter net 1
32 Paint cup set 1
33 Spanner 1
34 Cleaning brush 1
35 Hex socket screw key 1
JEFA048

3
USER MANUAL
HVLP Gravity Spray Gun
JEFA048
•1.4mm nozzle
•0.6 Litre plastic cup with integrated drip-catching device
•Variable round/at spray control
•Air micrometer
•Universal wrench
•Hollow key
2. Box Contents
Caution: When using solvents and cleaning agents based on halogenated hydrocarbons e.g. 1.1.1-trichlorethylene and
methylene chloride, chemical reactions can occur on the aluminium cup, gun and on galvanized components (for example: small
quantities of water added to 1.1.1-trichlorethyelen produce gydrochloric acid). This can cause oxidation of the components: in
extreme cases, the reaction can be explosive. Therefore only use solvents and cleaning agents for your paint gun which do not
contain the substances named above. Never use acid for cleaning purposes.
Warning: Never point paint guns at yourself, at other persons or animals. Solvents and diluting agents can cause burns. Before
any repair work may be carried out, the unit must be disconnected from the compressed air network and pressure must be
released. Before starting to use the paint gun, Particularly after repairs, ensure that screws and nuts are correctly tightened,
and check that gun and hoses do not leak. Defect components must be replaced or repaired, use original spare parts only. No
sources of ignition (e.g. open flames, burning cigarettes, lamps without ex-protection etc.) may be present during painting, as
easily flammable mixtures are generated during the painting process. Occupational safety regulations must be applied when
painting (respirator protection etc.). Appropriate ear protection muffs are required, as a sound level of 90dB(A) can be
exceeded when painting under higher pressure levels.
4.1 Safety Checks Before Use
1. Before using the gun check that all nuts and bolts and detachable parts are securely tightened.
2. Always disconnect the unit from the air supply before removing any parts or carrying out any adjustments.
3. Mount the nozzle set tightly. Align the air nozzle so that the number stamped into it can be read from the front
the right way round.
4. Blow out the air hose to remove any dust and debris before attaching it to the air connection.
5. Rinse/ush the spray gun thoroughly before use. This is important as the gun has been treated with an
anticorrosive agent before leaving the factory and must therefore be ushed out thoroughly with thinner
before use.
4. Operating Instructions
3. Specification
Air Pressure 43psi / 3bar
Air Inlet ¼"
Air Consumption 15cfm
Cup Capacity 600ml
Feed Type Gravity
Fluid Nozzle 1.4mm
JEFA048

4
USER MANUAL
HVLP Gravity Spray Gun
JEFA048
4. Operating Instructions
4.2 Regulating the Air Supply
The air supply can be adjusted to accommodate a range of working pressures using the micrometer:
1. Setting the Micrometer in the vertical position (parallel to gun body) = maximum pressure.
2. Setting the Micrometer in the horizontal position (across gun body) = minimum pressure (for blending, etc.)
4.3 Regulating Flow Volume
1. The volume of material owing from the nozzle and needle stroke can be adjusted using the material-volume
regulation screw.
4.4 Changing Nozzles
When changing nozzles it's important that you change the complete nozzle set. The nozzle set
consists of an air cap, uid nozzle and paint needle. Always insert the paint nozzle before the paint needle.
4.5 Replacing the Air Piston & Air Packing
To replace the air piston:
• Remove the hollow screw and detach the air micrometer
•Pull out the spring and air piston
•Exchange the air piston
•Unscrew stufng box screw and remove the old packing
•Insert new packing with (at end rst) and gently tighten the stufng box screw towards the packing
•Flush the material-conveying parts of the gun thoroughly with thinner on a regular basis to prevent any
possible particle build-up.
•Clean the air nozzle with a paint brush or brush. Note: Do not immerse the nozzle in thinner.
•Under no circumstances try to clean clogged orices using an unsuitable tool, since the slightest amount of
damage to the orices will affect the performance of this tool and could pose a safety hazard.
WARNING:
Never remove the micrometer hollow screw while connected to the air supply.
!
5. Cleaning & Maintenance

5
USER MANUAL
HVLP Gravity Spray Gun
JEFA048
6. Troubleshooting
Problem Cause Solution
1. Gun leaks from fluid tip Foreign substances between fluid tip
and needle prevent sealing
Clean fluid needle and fluid
nozzle in thinner or replace
with a full nozzle set
2. Paint merges from fluid
needle or needle sealing
Self tensioning needle sealing
damaged or lost
Replace needle sealing
3. Spray pattern in sickle-
shaped
Horn air holes or air circuit clogged Soak in thinner, afterwards
clean with the nozzle - clean-
ing needle
4. Drop like or oval shaped
pattern
Dirt on fluid pin tip or air outlet •Turn air nozzle by 180
degrees
•lf defective pattern remains,
clean fluid tip pin and air
circuit
5. Paint Spray flutters •Insufficient volume in the cup
•Fluid nozzle is loose
•Needle sealing damaged,
•Nozzle set dirty or damaged
Refill material, tighten parts, if
necessary clean or replace
parts
6. Material bubbles or boils
in paint cup
•Atomization air flows through the
paint channel to the cup
•The paint nozzle is loose
•Air nozzle is not screwed in tight
•The air nut is clogged and the seat
is defective
•Nozzle insert is damaged
Tighten parts accordingly,
clean or replace

6
USER MANUAL
HVLP Gravity Spray Gun
JEFA048
Jefferson Tools, Herons Way, Chester Business Park, Chester, United Kingdom, CH4 9QR
Tel. [phone]
Email: [email protected]
IMPORTANT! SAFETY FIRST!
Before attempting to use this product please
read all the safety precautions and operating
instructions outlined in this manual to reduce
the risk of fire, electric shock and
personal injury.
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