Ransburg Evolver 202 Solvent A11918-XXX - Manual (Page 39)

AA-07-01 3 4 3 4 3 4 3 4 3 4
Evolver 202 Robotic Atomizers - Maintenance
Rear Needle Replacement Rear Needle Replacement Rear Needle Replacement Rear Needle Replacement Rear Needle Replacement
(See Figure 9b) (See Figure 9b) (See Figure 9b) (See Figure 9b) (See Figure 9b)
1. Remove the air cap, fluid tip, and the fluid nozzle
as described in steps 1 through 8 of the "Fluid Tip,
Nozzle, and Front Needle Replacement" in the
"Maintenance" section.
2. Remove the rear needle [6] and lock nuts [4]
and [5] as an assembly. Pull the assembly out
from the rear of the spray head.
> Fluid seal [29], seal washer [28], and seal
spring [27] will come free at this point. Place
hand over front end to prevent dropping parts.
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
!!!!!
3. Inspect the metal portion of the rear needle [6]
for excessive wear. If wear is observed (longitu-
dinal grooves or a noticeable reduction in diam-
eter) replace the needle. Remove the two (2) lock
nuts from the rear needle and save. When ever
replacing rear needle section, you must also re-
place the seal [29] at the same time.
4. Place the rear needle assembly back into the
spray head.
5. Place seal spring [27] over the rear needle in
the front end of the spray head. Hold the spray
head upward as the spring will want to fall out.
6. Still holding the spray head upward, place the
seal washer [28] and thread the fluid seal [29] onto
the rear needle. The tapered end of the fluid seal
should be pointed toward the front of the applica-
tor.
7. Insert the lubricated o-ring [30] into the applica-
tor head. Gently push, with small flat object, down
upon its seating edge. Be careful not to push
o-rings into fluid groove (see Figure 9b).
8. Reassemble fluid nozzle [32] by pushing the
nozzle into the spray head and through the o-ring
until the threads engage. Screw the nozzle into
the spray head. Torque to 23-25 lbs•in (2.6-2.8
Nm). Plastic threads damage easily; do not over-
tighten. Note the front flange of the fluid nozzle will
not seat flush against the spray head.
9. Apply Loctite #222 Low Strength (purple)
Threadlocker into the threads of plastic front
needle [31] before assembling onto the rear needle.
Be sure that the rear needle assembly is pushed
all the way forward before threading on front
needle.
10. Reassemble fluid tip [34]. Hand tighten first;
then with a small wrench turn an additional 30
°.
11. Reinstall the two (2) lock nuts [4] and [5] in the
correct order on the back needle as shown mak-
ing sure to maintain an 1/16" clearance (see
Figure 9b).
> Ensure that the fan and atomization air
are on and flowing prior to triggering the
fluid. Ensure air before fluid adjustment is
correct. Failure to follow this sequence
will cause spits and defects on the part
being painted.
N O T E N O T E N O T E N O T E N O T E
12. Reassemble air cap [35] and air cap retainer
[33]. The air cap rotate positioning pins must be
engaged with the air cap locator holes before final
tightning.
13. Apply a thin film of petroleum jelly to valve
spring [3] and needle spring [2], and insert back
into the end cap. Screw end cap [1] back on.
14. Lubricate all of the o-rings on the underside of
the spray head with petroleum jelly, and apply a
thin coat of dielectric grease to the grooves of the
spray head and the valve manifold before reas-
sembly.
15. Reattach spray head to manifold block by
engaging the connection plug [24] into the mount-
ing block cavity [3], and turn clockwise until head
contacts stop pin on the block.
16. Secure with locking tab by turning screw
counter-clockwise (see Figure 9a).
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