Graco ULTRA PLUS+ 1500 Instruction Manual page 11

Troubleshooting
WPE
OF
PROBLEM WHAT
TO DO
WHAT TO CHECK
If check is
OK,
go to nert check When check is not OK refer to this column
Uotor runs and pump strokes, Check extension cord size and length.
J u t p u t .
type extension cord.
Jut output is low or there is no
Replace cord with a larger size, grounding
Check paint supply.
lighten; use thread sealant or sealing tape
Check for loose suction tube or loose fittings.
Remove and clean strainer and reinstall.
Check for clogged intake strainer.
Refill and reprime pump.
on threads,
if
necessary.
Check for worn spray tip.
Follow Pressure Rellef Procedure Warning,
then replace tip. See your separate gun or tip
manual.
Check motor brushes; check for loose leads
and terminals, minimum
112"
brush length,
Replace parts
as
needed. See page 12.
broken or misaligned springs, or brushes
binding in holders.
See
page
12.
armature tester farowlerl.
Check motor armature for shorts by using an Replace motor. See page
19.
.
...
.-
I
Check
to
see if pump continues
to
stroke Service pump. See page
13.
when gun trigger is released. With pump on
and primed, trigger gun momentarily, then
release and engage safely latch. Relieve
pressure,
turn
off and unplug sprayer.
Check to see if intake valve ball and piston
Remove intake valve and clean. Check balls
ball are seating properly. and seats for nicks; replace if necessary. See
particles that could clog the pump.
page
14.
Strain paint before using to remove
Check for leaking around throat packing nut Replace packings.
See
page 13. Also check
which may indicated worn or damaged
packings.
and replace ifnecessary. lighten the packing
piston valve seat for hardened paint or nicks
nut!wetcup.
lotor runs but pump does not
connectins rod. See
Fio.
38. Daae 17.
spring (35)
is fully in groove a l l around
pin (20). See page 17.
troke.
. .
Replace pin, if missing. Be sure retainer
Check displacement pump connecting rod
-
Check for frozen or hardened paint in the
Thaw. See
NOTE
1.
Plug in sprayer and turn
-
..
-
Pump ( 3 9 ) .
on. Slowly increase pressure setting to see if
motor
starts.
Be sure crank in drive housing rotates: plug in
and unplug sprayer.
and replace
if
necessary. See page
21.
sprayer and turn on briefly to check. Turn off
Check driie housing assembly for damage
lotor
I s
hot and runs
Rermittently.
pressure with small tips, which causes low size.
Determine
if
sprayer was operated
a t
high
Decrease pressure setting or increase tip
motor RPM and excessive heat build up.
Be sure ambienttemperature wheresprayer is Move sprayer to shaded, cooler area, if
not located in direct sun.
located is no more than 90°F and sprayer is possible.
Determine in sprayer was turned on,
pressurized, but not operating for long
Turn off sprayer whenever you stop spraying
for a while and relieve fluid pressure.
periods of time.
NOTE
1:
Thaw the sprayer
if
water or
water-based paint
has
frozen
in
it,
by placing it in a
warm
area.
Do
not
try to
staft the
sprayer
until it
has thawed completely. If paint hardened (dried)
in the
sprayer, replace
the pump pack-
ings.
See
page 15.
"_
".
..