4
Place the new tip into its seat in the airbrush body (see photograph 1), and then screw the head
and spray regulator onto the airbrush body. The head assembly on the Model 155
™
is designed
to be tightened firmly by hand –
use of pliers or other tools should not be necessary!
Before spraying, reseat the needle into the new tip by pushing the needle forward until it
stops. Do not push forcefully or the tip could split at the end. The Needle Chuck should then
be re-tightened.
MANUFACTURER’S NOTE: Although the nozzle and needle assemblies of this airbrush are
manufactured to easier maintenance “finger tight” tolerances the initial removal of some
components may require the use of a small pliers. If a pliers is necessary for initial compo-
nent disassembly, just finger tighten it when reassembling and the pliers should not be
required for assembly/disassembly thereafter.
REMOVING & REPLACING THE NEEDLE
The Model 155
™
is designed so that the needle can be removed
without removing the handle.
The Needle Chuck can be loos-
ened through the openings in the cut-away handle (51-075),
(see photograph 2) which will permit the needle to be removed
by pulling it straight back. If the needle sticks, try turning the
needle as you pull back. If this proves unsuccessful, grip the
knob on the end of the needle with pliers and apply a twisting
force to free the needle. Be careful when using this method to
avoid damage to the airbrush.
Before installing a needle, check for hardened paint on the needle. This can be cleaned off of the needle by
holding the needle flat on a tabletop and rubbing a pink eraser along the length of the needle until all paint
residue is removed. Use your thumb and forefinger to remove any eraser particles.
A bent needle may need to be replaced. If the needle has a tiny “hook” at the point, you might be able to
straightened it out by placing the needle on a firm surface so that the tapered part of the needle is flat
against the surface. Run your fingernail across the tip as you rotate the needle. Always drag your fingernail
towards the point of the needle.
TRIGGER TENSION
Your Model 155
™
airbrush has been set with maximum trigger tension which should be suitable for most
users. If less return spring back pressure is desired, the spring screw (50-031) can be
partially
unscrewed
to lessen the spring pressure. Do not unscrew the entire tube shank (50-030) assembly to release pres-
sure on the Model 155
™
. If the tube shank is not seated firmly in the body of the airbrush, it may spin
when trying to loosen the needle chuck through the openings in the cut-away handle.
REMOVING THE TUBE SHANK & TRIGGER COMPONENTS
Before removing the handle to remove or adjust any of the tube shank components, the needle must be
removed by loosening the needle chuck through the openings in the cut-away handle and drawing the nee-
dle out from the rear.
The tube shank assembly can then be removed as a group, using
needle-nose pliers if necessary to initially loosen the tube shank
from the body. The trigger (50-019) and back lever (50-042) can
also be removed at this time.
If further disassembly of the tube shank assembly is needed, start
by removing the needle chuck from the needle tube (51-043). This
will allow the needle tube to slide out of the
front
of the tube
shank. The needle tube spring (50-044) can be removed from the
tube shank by unscrewing the spring screw from the end of the
tube shank.
Reassembly is essentially the reverse.
When placing the needle
tube into the tube shank, notice how the flat side of the needle tube must line up to fit into the “D” shaped
hole in the front of the tube shank. To re-install the trigger and back lever, place the back lever into the slot
on the top of the airbrush body (see photograph 3), and move it forward.
Make sure that the bend of the
back lever is directed towards the rear of the airbrush.
The tube shank assembly may now be screwed into the airbrush body. To install the trigger, pull the back
lever towards the rear of the airbrush and insert the trigger so that it is seated properly within the air valve.
