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Maintenance and inspection
WARNING
First release air and pressure fully according to item No.2 of "Improper use of equipment" of WARNING on page 1 to 2.
Tip of fluid needle set has a sharp point. Do not touch the tip of needle valve at the maintenance.
Be careful not to damage the tip of fluid nozzle.
Only an experienced person who is fully conversant with the equipment can do maintence and inspection.
.
CAUTION
Never use commercial or other parts instead of original spare parts.
Never immerse the whole gun into any solvent or cleaning solution such as thinner for over 1 minute.
If not, it may be detrimental to the lubricants, and the seals inside may be out of shape and lead to leakge, even there's no any
rubber parts used inside the gun, such as o-ring.
When replacing the fluid nozzle or fluid needle, replace both at the same time.
Using worn parts can cause fluid leakage. Also, replace the needle packing at this time.
Torque the fluid nozzle to 18~20Nm (160~180lb.in).
To prevent damage to fluid nozzle or fluid needle, be sure to either pull the tirgger and hold while tightening or loosening
the fluid nozzle, or remove fluid adjusting knob to relieve spring pressure against needle collar.
The gravity cup is made from special anti-static materials, but it is still improtant to avoid generating static charges.
The cup must not be claned or rubbed with a dry cloth or paper. It is possible to generate a static charge by rubbing witch, if
discharged to an earthed object could create an incendive spark and cause solvent vapours to ignite.
Only use a dampened cloth or antistatic wipes if manual cleaning is required within a hazardous area.
For routine clean/maintenance, do not dismount any other part than air cap, nozzle and needle from the gun (The spray
head may needs to be cleaned it it is dirty).
If not, the seals & packings inside may face a risk of being out of shape and lead to leakage.
Step-by-step procedure
1.
Pour remaining paint out after use. Clean fluid passages and air
cap set. Spray a small amount of thinner to clean fluid passages.
2.
Clean each section with brush soaked with thinner and wipe out
with waste cloth.
3.
Before disassembly, fully clean fluid passages.
(1) Disassemble fluid nozzle.
Use spanner to remove fluid nozzle.
(2) Disassemble fluid needle set.
Remove fluid adj. knob and fluid needle spring, and then pull
out fluid needle spring, and then pull out fluid needle from
back of housing.
4.
Servicing/replacing air valve.
(1)
Remove trigger circlip.
(2)
Remove trigger pivot.
(3)
Remove fluid adjusting knob and spring.
(4)
Using a spanner to remove valve housing set.
(5)
Remove spring and valve spindle.
(6)
Remove the front valve seal and valve seat from the gun body
with a hooked instrument.
(7)
Fit new front seal into gunbody from front and press firmly to
ensure seal is engaged.
(8)
Fit new valve seat into gunbody from behind, groove must
face outwards.
(9)
Remove rear air valve seal from housing with a hooked
instrument.
(10) Fit new seal into housing, groove must face outwards.
(11) Reassemble remaining parts in reverse order.
(12) Trigger gun fully and screw in fluid adjusting knob until it
stops. Back it off 1/2 turn and gun will have full needle travel.
(13) Trigger gun several times to verify correct operation.
5.
Replacing needle packing.
(1)
Remove trigger and needle following steps 1 to 6, service air
valve.
(2)
Loosen and remove packing nut using a spanner.
(3)
Remove packing with a hooked instrument.
(4)
Fit new packing into gunbody by hand and then tighten further
by spanner.
(5)
Complete re-assembly in reverse order.
Where to inspect
1.
Each hole passage of air cap and fluid nozzle.
2.
Packing and seals
3.
Serious leakage between fluid nozzle and needle.
Parts list
Do not over tighten.
1.
Incomplete cleaning can fail pattern shape and uniform
particles. Especially clean fully and promptly two-component
paint after use
2.
Do not immerse the whole in thinner for over 1 minute. If done,
it may damage parts inside, and lubricating may be needed.
3.
During disassembly, do not scratch housing section.
(1)
Remove fluid nozzle aftter removing fluid needle or while
keeping fluid needle pulled, in order to protect housing
section.
(2) Be careful when handing tip of fluid needle since it is sharp.
4.
Service air valve only when it is not functioning correctly (may
need cleaning) or air leaks.
5.
Service needle packing only when it is not functioning correctly
or air leaks.
Too much tightening of fluid needle packing nut can cause bad
movement of fluid needle set and fluid leakage from the tip of
fluid needle.
Replace if it is crushed or deformed.
Replace if it is deformed or worn out.
Replace them both if leakage does not stop after fully cleaning fluid
nozzle and fluid needle.
3
Important
Parts replacement
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