NO
OUTPUT
TYPE
OF
PROBLEM
1.
Refill and reprime pump.
1.
Check paint supply.
Motor runs and pump strokes
WHAT
TO
CHECK
if check is
OK,
go
to
next
check
WHAT TO
DO
When check is not
OK
der to rhis column
2.
Check for clogged intake strainer.
2.
Remove and clean, then reinstall.
I
3. Check for
loose
suction tube or fmings. 3. Tighten; usethreadsealantorsealingtape
I
on threads if necessary.
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4.
Checktoseeifintakevaiveballandpistonbail
are
seating properly.
See
page 29.
4.
Removeintakevalveandclean.Checkballs
move particles that could clog the pump.
Seepage29Strainpaintbeforeusingtore-
and seats for nicks; replace if necessary.
5. Check for leaking around throat packing
nut
5.
Repiacepackings.Seepages29-33.Also
which may indicate worn or damaged pack- check piston valve seat for hardened paint
ings.
See
page 29.
the Dackina
nuthvet-cuo.
or nicks and replace if necessary. Tighten
I
stroke
Motor runs
but
pump
does
not connecting rod 1 Replace pin
if
mtsslng
Be
sure retainer
I
'
spring (42)
isfullyingrooveallaroundcon-
I
I
I
I
nectina rod.
See
oaae 32.
I
2.
Checkconnectingrodassembly(68)fordam-
age.
See
page
24.
2.
Repiace connecting rod assembly. See
page
24.
3.
Besurecrankin drive housing rotates; plug in
and unplug sprayer.
See
page 25.
3. Checkdrive housing assemblyfordamage
and replace if necessary.
See
page 25. sprayer and turn
on
briefly to check. Turn
off
EXCESSIVE PRESSURE FLUCTUATIONS
WHAT
TO
CHECK
If
check
is
OK,
go
to
next
check
1.
Besureleadstopressurecontroicircuitboard
(B1)arefirmlvconnected.Besureallmaleter-
mirials bladis
are
centered and firmly con-
nected to female terminals. See Fig. 33.
2.
Check maximum working pressure.
WHAT
TO
DO
When check is not
OK
refer to this column
1.
Reconnect securely. See Fig. 33.
2.
Replace with anewpressurecontroi board
(301).
See
page
22.
3.
Checkpressurecontrol board (301) bysubsti- 3. Replace withanew pressure control board
tutingwithagoodpressurecontrolboard.See
(301).
See
page
22.
Dam
22.
I
1
I
4.
Check
LOW
OUTPUT section, page 14.
._
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"
308-560
15
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