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
St
ains
Lacquers Enamels Ur
ethanes
Acrylics Emulsions Lat
ex
Block fi
ller
Intumesc
ents
Texture material
for spray applications
1
st
digit X5
=
fan width
*
Time to
change!
NEW
WORN
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