Page 1
www.graco.be
GMAX
™
II
3900/5900/5900HD/7900
SETUP
Connect hose to sprayer and gun.
Tighten hose connections with wrench.
Unscrew tip
& guard from gun.
Fill throat packing nut
with TSL to prevent
premature packing wear.
Make sure
power switch
is set to OFF.
Check oil level of
motor and pump. Cold engine starts.
Turn prime valve
to Prime position (down).
Place siphon tube in pail
partially filled with water.
Turn pressure control knob
to lowest pressure, and
set power switch to ON.
Increase pressure until sprayer
starts and water runs out of
prime tube.
Let water run out of prime
tube for 15 seconds.
Decrease pressure
until sprayer stops.
Turn prime valve
to Spray position
(horizontal).
Make sure safety lever of
gun is OFF.
Aim gun at inside
wall of water pail
and squeeze trigger.
Increase pressure until
sprayer starts. Keep gun
triggered into water pail
for 1 minute. Release trigger.
Turn prime
valve to Prime
position (down).
Place siphon tube in paint
pail, but leave drain tube in
water pail.
Aim gun at inside wall of
water pail, and squeeze
trigger.
Transfer drain
tube to paint pail.
Increase pressure until
sprayer starts and paint
comes out of drain tube.
Keeping gun triggered into water
pail, turn prime valve to Spray
position (horizontal).
When paint comes out of gun,
release trigger and turn safety
lever of gun to ON.
Screw tip & guard onto gun, making sure
arrow-shaped handle of tip is pointing forward. You
can reverse this tip to quickly clear clogs
without taking it apart.
This procedure is for water-base paints and flushing fluids. For solvent-base paints and flushing
fluids (i.e. mineral spirits), you must read Fire and Explosion Hazard in the Operating Instructions.
* check the Graco operations manual delivered with the unit for more details.
CHOOSE THE RIGHT TIP & FILTER
WARNING
1
3
2
4
Quick Operator’s Guide
207
307
109
209
309
409
509
609
111
211
311
411
511
611
113
213
313
413
513
613
115
215
315
415
515
615
815
217
317
417
517
617
817
917
119
219
319
419
519
619
819
121
221
321
421
521
621
721
821
223
323
423
523
623
723
225
325
425
525
625
725
327
427
527
627
827
429
529
629
729
331
531
631
831
433
533
633
833
235
435
535
635
735
835
935
439
443
543
645
451
551
455
555
655
5 cm
10 cm
15 cm
20 cm
25 cm
30 cm
35 cm
40 cm
45 cm
3 cm
7 cm
10 cm
15 cm
20 cm
25 cm
30 cm
35 cm
40 cm
pump filter
gun filter
200 mesh
100 mesh
100 mesh
100 mesh
60 mesh
60 mesh
none
none
30 mesh
* at 30 cm spraying distance
Ink
Stains
Lacquers
Enamels
Urethanes
Acrylics
Emulsions
Latex
Block filler
Intumescents
Texture material
for spray applications
1st digit X5
=
fan width
*
Time to
change!
NEW
WORN
Page 2
SPRAYING
Turn safety lever
of gun to OFF.
Point gun at area to be sprayed about 30 cm from surface, and begin moving gun before triggering. A good spray pattern is evenly distributed as it hits surface.
Set pressure just high enough to spray without heavy edges. Use smaller tip size for thinner material and a larger tip size for thicker material if pressure adjustment cannot achieve even spray pattern.
SHUTDOWN AND CLEANUP * for AutoClean
2
™
: see bottom of this page
Set power
switch to OFF.
Trigger gun
until pressure
is relieved.
Turn prime valve to
Prime position
(down).
Remove gun filter
assembly.
Unscrew tip & guard from
gun. Clean gun filter, inlet
screen, tip, guard and
manifold filter with water
and brush.
Set power switch to ON,
and increase pressure
until sprayer starts.
As soon as Pump Armor
comes out of drain tube,
set power switch to OFF.
Screw inlet screen onto siphon
tube, replace manifold filter and
spacer, and assemble gun with
filter, tip and guard.
Wipe outside of sprayer,
hose and gun with rag soaked
in water or mineral spirits.
Fill throat packing nut
with TSL
™
Place drain tube
and siphon tube
in pail of water.
Turn pressure control knob to lowest setting, set power switch to
ON, and increase pressure until
sprayer starts. Let sprayer run and
flush itself for 2 minutes.
Keeping gun triggered
into water pail, turn prime
valve to Spray position
(horizontal).
Set power switch to OFF, turn
pressure control knob to lowest
setting, and turn prime valve to
Prime position (down).
Place drain tube in waste pail
and siphon tube in
container of Pump Armor
™
Assemble gun
without filter.
Unscrew inlet screen
from siphon tube.
Keep gun triggered
into pail for 1 minute,
until water coming out
of gun is clean.
Remove manifold
filter and spacer.
Remove suction and drain tubes from
paint. Place drain tube into waste pail
and wipe suction tube clean.
Place suction tube in
appropriate cleaning fluid.
Close drain valve.
Switch power ON.
To save paint from hose and pump,
trigger gun into paint pail and increase
pressure. When cleaning fluid appears,
release gun trigger.
Turn pressure all the way down.
Open drain valve.
Screw connector
onto gun.
Rotate trigger lock
clip 90° to lock
trigger open.
Press display button
until timer appears and turn
pressure control knob to highest.
Close drain valve.
With clean fluid, briefly trigger gun
into waste pail several times to
clear any debris from front of gun.
Install tip and guard and briefly trigger
gun into waiste pail to clean tip.
Reverse tip if necessary.
GRACO N.V. Industrieterrein Oude Bunders
Slakweidestraat 31 • B-3630 Maasmechelen
Tel: +32 (89) 770 700 • Fax: +32 (89) 770 777
E-mail: info@graco.be • http://www.graco.be
All information, illustrations, and specifications in this document are based on the latest product information
available at the time of publication. The right is reserved to make changes at any time without notice.
© 2002, 2006 Graco N.V. · Form No. 328009 E (rev.C) · 01/08 · Printed in Europe.
Graco is certified ISO 9001.
Place gun in
AutoClean connector.
Slide open end
over back of handle.
AUTOCLEAN
2
™
GUIDE
When finished, remove
trigger clip from gun handle.
Unscrew connector from gun.
Remove gun from connector.
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