TROUBLESHOOTING
GUIDE
WARNING
Pressure
Rellef
Procedure
Toreducetheriskofseriousbodilyinjury,
includingfluid
6.
Open the fluid pressure drain valve and leave it
from moving parts, always
follow
this procedure when
,,
Disconnecl
the
spa*
plug cable.
injection, splashing in the eyes or on
the
skin, or injury
open until you start the sprayer again.
YOU
shut
off
the sprayer, when checking, adjusting
Or
If
you
suspect
the
hose
or
tip
is
co,,,p,ete~
‘leaning
the
system’
and
when
changing
spray
tips‘
clogged
or
that
pressure is
not
fully relieved after fol-
1. Engage the gun safety latch.
2.
Tum the engine stop lever
to
OFF. taining nut or hose end coupling and
VERY
SLOWLY
lowing the
steps
above, wrap
a
rag around the tip re-
3. Flip the pressure control switch to OFF.
4.
Disengage the gun safety latch. Hold a metal part clear the tip
01
hose.
loosen the part
to
relieve pressure gradually.
NOW
5. Engage the gun safety latch.
of the gun firmly to the side of a grounded metal
pail, and lrigger
the
gun.
‘4
5
6
Check everything In the chart before disassembling the sprayer. (Continued
on
page 25.)
PROBLEM
I
CAUSE
I
SOLUTION
I
-
Enginelsprayer won’t
start
Turn
on
engine Switch. Engine switch
not
on
Out
of
gas
TI^
starting engine.
If
li@t
on
rear
of
engine Engine oil
level
low
Refill gas lank.
glows, replenish oil.
I
Spark
plug cable disconnected or Connect cable on top
of
engine
or
replace
spark
spark plug damaged
I
Plug.
I
1-
Water frozen in pressure wntrol
Return
pressure wntrol
lo
authorized Graco
dealer for remir.
Engine won’t “fire”
chamber
Oil seepage into combustion
CleanandreplaCeplug.Trytostart.Keepsprayer
Removespa~~lug.PullstaRerrope3or4times.
upright
to
avoid oil
seepage.
pump
doesn’t
EnginBOpBrates.
but
displacement
Turn
on
pressure wntrol switch.
Pressure control switch turned
OFF
Pressure
setting
too
low
Displacement pump outlet
filter
dirty
Clean tip or tip filter.
Tip
or
tip
filter clogged
Clean filter.
Service pump.
See
page
28.
Displacement pump rod seized by
dry
mint
~~ ~ ~ ~~
Increase pressure.
I
Connecting rod worn or damaged
I
Replace wnnecting rod.
See
page
30.
I
.I
Drive housing worn
or
damaged
I
Replace drive hOUSinQ.
SeS
page
31.
I
Electrical power nd energizing field
With pressure control switch
ON
and pressure
Check wiring wnnections.
See
page
36.
turned
to
MAXIMUM,
use
a test
light
to check
continuity across black and whlte wires
from
pressure control.
1
I
Have pressure control checked
by
authorized
Graco
dealer.
I
Clutch worn or damaged
Pinion assembly worn or damaged
%Nice
Clutch.
See
page
34.
SENICE pinion assembly. See page
32.
!4
308-105
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