No
Output
Type
of
Problem
What
to
Check
If
check
is
OK,
go
to fhe next check
What
to
Do
If
check
is
not
OK,
refer to
this
column
Motor runs and pump
strokes
1.
Check paint supply.
2.
Check for clogged intake strainer.
1.
Refill and reprime pump.
3.
Check for
loose
suction tube or fittings.
3.
Tighten; us8 thread sealant
or
sealing tape
2.
Remove and dean, then reinstall.
4.
Check to see
if
intake valve ball and piston
4.
Rem0veintakevalveandclean.Checkballs
ball
are seating properly.
See
page
33.
and seats for nicks; replace
if
necessary.
on threads
if
necessary.
See
page
33.
5.
Checkforleakingaroundthroatpackingnut
pislonvahreseatforhardenedpaintornlcks
whichmayindicatewornordamagadpack-
5.
Replacepackings.Seepage33.Alsocheck
and replace
if
necessary. ings. See page
33.
Motor runs but pump does
1.
Checkdisplacementpumpconnectingrod
1.
Replace pin
if
missing.
Be
sure retaining
not
stroke
.pin
(20).
See
page
35.
3.
Checkdrivehousingassemblyfordamage
13.
%surecrankindrivehousingrotates;plug
2.
Replace connecting rod assembly.
See
2.
Check connecting rod
(9)
assembly for
spring
(21)
is
fully
in
groove all around con-
necting rod.
See
page
35.
damage. See page
28.
check. {urn off and unplug sprayer. See
page
28.
Daae
28.
and replace
if
necessary.
See
page
28.
In spra
er
and turn on momentarily to
Excessive Pressure Fluctuations
Type
of
Problem
Spray pattern variations
What to Check
If
check
is
OK,
go
to
the
next
check
I.
Be sure both
01
and
62
leads from bridge
(308)
to
circuit board
(72)
are firmly con-
?,
Check sta!l pressure. Refer to Pressure
nected.
See
page
24.
5.
Check bourdon tube flag (A) and detector
Control Adjustment on page
26.
position. Turn pressure setttng
to
maxi-
detector
(6)
slot
of
circui board.
mum:flagshouldnotdra$orbindinoptical
72
A
I.
Checkcircuitboard
(72)
bysubstiiutingwith
i.
Check
LOW
OUTPUT
section on Daae
14.
a good board.
See
page
24.
If
check
is
not
OK,
refer to this column
?.
Adjust pressure control. See page
26.
3.
Car~fully bend flag (A) into alignment with
detector(6)slottoseeifthatcorrectsprob-
lem.
If
not, replace bare pressure control
ter reassembly.
assernbly(300).Adjustpressurecontrolaf-
I.
Replace circuit board. See page
24.
307-889
15
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