Graco Inc. 216-119 User Manual

Page 4

should be taken when starting threads. Applied

vide you with years of durability and efficiency

These working parts require periodic replacement:

1. Air cap (7).

2. Fluid tip (6).
3. Needle, fluid (41).

Removing Fluid Tip

To remove fluid tip (6) for cleaning or replacement,
remove the ring nut (8) and air cap

turn off the

atomizing air, trigger the gun to release needle pressure
on the tip. Remove the tip with a wrench. Replace with
the needle triggered to the rear.

When replacing air cap

on the gun, be sure the wire

electrode coming from the needle

is centered in the

air cap center hole. The best method is to slide the air
cap onto fluid housing

making sure that the wire

goes through center hole of air cap, then tighten ring

nut

onto barrel

allowing air cap to be drawn up

evenly on the fluid tip. Check alignment of ionizing wire
in the fluid stream.

Removing Fluid Tip Housing
If the housing

is removed, the o-rings

should be

replaced and the housing firmly seated. The housing
must be torqued no more than 15-20 ft-lb

plastic threads may become stripped. Lubricate with
petroleum jelly new o-rings on housing before replacing
in gun barrel.

NOTE:

Fluid tip (6) must be removed from housing

before replacing to avoid damage to ionizing
wire.

Replacing Fluid Needle

Turn off the atomizing air and fluid, trigger the gun to

release needle pressure on the tip. Remove ring nut

and air cap

Remove fluid tip

with a

in.

wrench. Remove nut

and screw

from the rear

of the gun. With a long nose pliers pull out needle ex-
tension

nut

spring

and needle

Unscrew needle

from extension (46). (Pliers

maybe necessary as Loctite is used on threads.) Install
new needle

applying Locrite no. 290 or equivalent

to threads to prevent needle from coming loose during

operation. Reassemble needle into back of gun using
extreme care. Ionizing wire must remain straight as it
passes through rear actuator packings

After needle is assembled in the gun, replace fluid tip
and rear spring

and spring

along with ad-

justing screw

locknut

and air cap

For ad-

justment see Replacing Fluid Needle Extension.

Replacing Needle Guide
Needle guide (47) is pressed into rear of fluid housing
(5). Remove fluid housing and press out needle guide.

When replacing be sure internal chamfered end faces

rear of fluid housing.

Replacing Fluid Needle Extension
Remove needle (see Replacing Fluid Needle). When

replacing extension (46); locknut

and needle ad-

justing nut

must be readjusted on needle extension.

Push needle

needle extension

and piston

fully forward, and turn the adjusting nut

all the way

into the piston. Remove needle assembly from piston,

turn adjusting nut two turns counterclockwise, and
tighten locknut (29). This adjustment provides atom

air just before the fluid needle is engaged and after

seating.

Replacing Fluid Packing
The fluid packing

is replaced when the needle

is removed. Remove the packing nut

then pick out

the packing and replace. Replace the packing nut. In-
sert the fluid needle, tighten the packing nut and apply
pressure on the packing to a firm seating. Do not
tighten. The fluid needle should move without binding.
When the gun is completely assembled and fluid
pressure applied, the packing nut may be tightened to
correct a slight leak.

Removing Gun Barrel
It is seldom necessary to remove the gun barrel (42)

from the gun body

When necessary, this is ac-

complished by unscrewing the gun coupling

and

carefully lifting away from the gun body. Inspect o-rings

and 4) and replace if necessary. To line up guide pin

in barrel with hole actuator assembly keep indicator de-

tent

of barrel lined up with top of actuator.

Replacing Cylinder Adapter

The cylinder adapter

should not be removed unless

damaged.

Replacing Electrode Stem of Fluid Needle

If electrode stem (48) of fluid needle

needs replace-

ment, first unscrew electrode stem from fluid needle ex-
tension (46). Unscrew setscrew, and remove old elec-
trode stem.

Insert new electrode stem and replace setscrew.
Reassemble fluid needle (41) to fluid needle extension

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