Replacing The Check Valve, Valve Seal, And Air Tubes - CAPspray Maxum II HVLP Notice D'utilisation

5. Loosen the packing nut using a 3/8 inch wrench.
6. Loosen the air flow valve nut and remove the air flow
adjustment knob and the air flow valve nut to allow access
to the material flow adjustment housing.
7. Loosen and remove the material flow adjustment housing,
needle, seal, and spring using a wrench.
Air Flow
Valve Nut
Material
Adjustment
Housing
Seal and
Spring
Needle
8. Insert an 1/8 inch hex wrench into the back of the needle
guide shaft.
9. Hold the retaining nut with a wrench and turn the 1/8 inch
hex wrench counterclockwise to remove the retaining nut.
10. Pull the needle guide shaft out of the gun body.
Retaining Nut
Needle
Guide Shaft
Replacing the Air Valve Seals
1. Remove the old rear air valve seal. It may stay on the
end of the needle guide shaft spring or in the material flow
adjustment housing.
2. Slide the new rear seal into the material adjustment
housing.
3. Remove the front seal retaining clip using a snap-ring
pliers.
4. Slide the old front air valve seal off of the needle guide
shaft.
5. Place the new front air valve seal on the needle guide
shaft with the beveled side facing the gun.
NOTE: Make sure that the new front air valve seal
looks like the one that was just removed.
SIDE VIEW
Front Air Valve Seal
6. Snap the front seal retaining clip onto the needle guide
shaft.
Front Seal Retaining Clip
Front Air
Valve Seal
Needle
Guide Shaft
Spring
Rear Air
Valve Seal
Material Flow Adjustment Housing
English
Removing the Packing
1. Remove the packing nut using a 3⁄8 inch wrench.
2. Insert a long, narrow-bladed flathead screwdriver through
the back of the gun and into the packing hole.
3. Press the screwdriver firmly into the packing and turn
counterclockwise. This should back the old packing out of
the threaded hole. If it does not, push the screwdriver
more firmly into the packing and try again. If this still does
not remove the packing, use a pick tool to pull the packing
out.
Packing Nut
NOTE: Make sure all of the old packing is removed
Installing the New Packing and Reassembling
the Gun
1. Place the new packing into the packing hole.
2. Thread the packing nut one turn into the packing hole. Do
not tighten.
3. Push the needle guide shaft through the back of the gun
body and thread on the retaining nut.
4. Grasp the material flow adjustment housing with the
needle attached. Slide the needle with the spring and the
rear air valve seal through the needle guide shaft and into
the packing nut. Tighten the material flow adjustment
housing securely using a wrench.
5. Tighten the packing nut securely using a 3/8 inch wrench,
then loosen the packing nut a quarter turn.
6. Thread the air flow valve nut and air flow adjustment knob
into the gun body and tighten into position.
7. Assemble the trigger by inserting the retaining pin or pins
and attaching the snap rings.
8. Pull the trigger to make certain the needle moves freely. If
the needle sticks, loosen the packing nut. If the packing
leaks, tighten the packing nut.
Replacing the Check Valve, Valve Seal,
and Air Tubes
The check valve is a one-way valve designed to allow air into
the cup, pressurizing the cup's contents. Because it is a one-
way valve, it prevents paint from seeping up the air tube into
the air passages of the gun. It also eliminates any delay in
material flow when the gun is triggered by maintaining
pressure in the cup.
The check valve rotates open easily for cleaning. It contains a
valve seal that can be removed and cleaned with soap and
Beveled Side
water for waterborne materials or a compatible solvent for
other materials. To replace the check valve, the valve seal,
and/or the air tubes:
1. Pull the lower air tube from the bottom of the check valve.
2. Pull the check valve from the upper air tube.
3. Unscrew the two halves of the check valve.
4. Remove the worn valve seal.
5. Clean the check valve body with a solvent appropriate to
the type of material being used.
NOTE: Thoroughly clean the inside of the top half of
6. Insert a new valve seal, stem up, into the top of the check
valve as shown.
7. Tighten the two halves of the check valve together.
6
Packing Hole
Packing Nut
before installing the new packing.
the check valve but do not scratch it.
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