1
PROBLEM
I
CAUSE
I
SOLUTION
I
Displacement pump outpui low
on
upstroke
Clean. Pump Inlet screen clogged
Piston
ball
check not seating
Replace packings.
%a
page
18.
Piston packings worn or damaged
Service piston
ball
chack.
Sae
page
18.
I
Sleeve gasket In displacement pump
Replace.
See
page
18.
worn
or
damaged
I
I
Displacement pump output low
on
downstroke
or
both strokes
Pump iniet screen Clogged Clean.
Piston packings worn or damaged
Intake valve
ball
check not seating
Replace paCklngS.
Sae
page
18.
Clean and
sewica.
%e
page
18.
Increase throttle setting.
See
Startup,
proprly
Engine RPM
tco
low
Clutch worn or damaged Replace.
Sea
page
24.
step
11,
Page
10.
I
I
Paint leaks into wet-cup
I
Loose
wet-cup
I
Tighten
just
enough
to
stop leakage.
1
1-
Throat packings worn or damaged.
Replace paCkingS.
%a
page 18.
DisDlacamant rod worn or damaaed
I
Replace rod.
Sea
Pam
18.
-
Low
fluid
delivery Claan. Pump inlet screen Clogged.
.-
Pressure setting
too
low lncraase pressure.
See
Startup,
Step
11,
page
10.
Step
11,
page
10.
Incraase throttle salting.
See
Startup,
I
I
Dirlv outlet filler.
tiD
filter
or
ti0
I
Clean.
.-
I
I
large
pressure
drop
in
hose
I
Use
larger
diameter hosa.
I
I
Spitting from gun
I
Air in fluid pump or
hose
I
Check for looseconnactions at Dum0 intake and
I
Them
prime the pump.
~ ~ ~~
.,
I
I
Tip
parlially
clcg~ed
I
claar.
I
..
I
Fluid supply is low or empty
~
..
Refillandprimethepump.SaeStartup,pagelO.
Check fluid supply
often
to
prevent
running
the
mlmn
drv
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