3
Maintenance and inspection
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.
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). Do not over tighten.
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.
If not, the seals & packings inside may face a risk of being out of shape and lead to leakage.
1. Pour remaining paint out after use. Clean fluid passages and air
cap set. Spray a small amount of thinner to clean fluid passages.
1. Incomplete cleaning can fail pattern shape and uniform
particles. Especially clean fully and promptly two-component
2. Clean each section with brush soaked with thinner and wipe out
with waste cloth.
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. 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
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 in order to
protect housing section.
(2) Be careful when handing tip of fluid needle since it is sharp.
4. Servicing/replacing air valve.
(1) Remove trigger circlip.
(2) Remove trigger pivot, washer and trigger pin.
(3) Remove trigger.
(4) Remove air valve housing assy with hex socket wrench or
spanner.
(5) Remove air valve spring from gunbody.
(6) Remove rear air valve seal from gunbody with a hooked
instrument.
(7) Remove air valve spindle from housing.
(8) Remove air valve packing nut with hex socket wrench or
spanner from housing.
(9) Remove air valve packing with a hooked instrument.
(10) Fit new air valve packing into housing.
(11) Screw air valve packing nut into housing.
(12) Fit new rear air valve seal onto housing.
(13) Insert back air valve spindle into housing
(14) Reassemble spring and air valve housing assy into gunbody.
(15) Reassemble remainning parts in reverse order.
4. Service air valve only when it is not functioning correctly (may
need cleaning) or air leaks.
5. Replacing needle packing.
(1) Remove fluid adjusting knob and spring.
(2) Trigger gun fully and pull out fluid needle.
(3) Remove air cap.
(4) Remove fluid nozzle with spanner.
(5) Remove spray head assy with hex key.
(6) Remove needle packing nut with hex socket wrench.
(7) Remove needle packing nut spring and needle packing.
(8) Remove rear spring washer with a hooked instrument.
(9) Fit new washers, spring,new packing and packing nut in
reverse order and ensure them are engaged.
(10) Reassemble fluid needle, needle spring and fluid adjusting
knob.
(11) Reassemble remaining parts in reverse order.
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.
1. Each hole passage of air cap and fluid nozzle.
Replace if it is crushed or deformed.
Replace if it is deformed or worn out.
3. Serious leakage between fluid nozzle and needle.
Replace them both if leakage does not stop after fully cleaning fluid
nozzle and fluid needle.
