Ransburg 75785 Service Manual page 50

REA-90 and 90L Spray Applicators - Maintenance
Removal Removal Removal
Removal Removal
(Refer to Figure 18) (Refer to Figure 18)
(Refer to Figure 18) (Refer to Figure 18) (Refer to Figure 18)
1. Turn control knob to the open position (screwed
fully out, counter-clockwise).
2. With a 9/16-inch wrench, unscrew the retaining
nut and remove the entire valve assembly.
Disassembly Disassembly
Disassembly Disassembly Disassembly
1. Turn the control knob clockwise to the closed
position or until it bottoms on the retaining nut.
2. Secure the control knob in a vise (do not
overtighten, it could break the control knob) with
the needle pointing upward.
3. With a 1/4-inch wrench on the wrench flats of
the needle, unscrew the needle and remove it from
the control knob stem.
C A U T I O N C A U T I O N
C A U T I O N C A U T I O N C A U T I O N
! ! ! ! !
With the control knob turned fully into the
>
retaining nut the tension on the spring is
relieved. If it is not, the needle could be
projected from the control knob stem and
cause personal injury.
4. Remove the spring from the control knob stem.
5. Unscrew the control knob and pull it out of the
retaining nut.
6. With a small rod (1/4-inch diameter), push the
two (2) washers and Teflon o-ring out of the
retaining nut.
Cleaning and Inspection Cleaning and Inspection Cleaning and Inspection
Cleaning and Inspection Cleaning and Inspection
1. Discard both o-rings. They should be replaced
with new ones.
2. Clean the parts in a suitable solvent.
3. Check all components for damage and also
check the needle for wear. Replace any damaged
or worn parts.
4 5 4 5 4 5 4 5 4 5
Assembly Assembly Assembly
Assembly Assembly
1. Apply a light coating of dielectric grease to a
new o-ring and slide it over the threads of the
retaining nut until it sets into the thread relief.
2. Apply a light coating of dielectric grease to the
control knob threads and screw it into the retaining
nut to the closed position or until it bottoms.
3. Place the first washer, a new Teflon o-ring, and
then a second washer onto the control knob stem.
Slide the components into the retaining nut bore.
4. Place the spring over the control knob stem
and into the retaining nut bore.
5. Secure the control knob in a vise with the
control knob stem pointing upwards. Apply a
small amount of medium strength thread locker to
the threads of the control knob stem.
6. Screw the needle onto the control knob stem
and with a 1/4-inch wrench, tighten the needle.
Reinstall Reinstall Reinstall
Reinstall Reinstall
1. Turn the control knob to the open position
(screwed fully out, counter-clockwise).
2. Screw the retaining nut into the handle by hand.
Using a 9/16-inch open-end wrench, secure the
retaining nut into the handle.
3. Screw the control knob to it's closed position.
AH-94-04.7