Graco EM 5000 - Page 15

307-913 15
PROBLEM CAUSE SOLUTION
Motor runs, but there is little or no
paint output and
pump does not
stroke
Filter element installed upside down Correct. See page 12 or manual 307–273.
Pressure control frozen or damaged by
over–pressurization.
Try to thaw, or replace pressure control. See
NOTE
B and C, below
. Pump is frozen Thaw . See NOTE B, below .
Paint leaks into wet–cup Loose wet–cup T ighten just enough to stop leakage.
Throat packings worn or damaged Replace packings. See page 32.
Displacement rod worn or damaged Replace rod. See page 32.
Excessive surging from spray gun Spray tip or fluid filter is plugged Disassemble and clean.
Spray tip too big or worn Change the spray tip.
Paint too viscous Thin.
Intake valve ball stuck Remove and clean intake valve.
W rong type hose Use minimum 15.2 m, static–free nylon hose
(wire braid hose is unacceptable).
Not enough paint pressure Pressure setting too low Increase.
Pressure control frozen or damaged by
over–pressurization.
Try to thaw, or replace pressure control. See
NOTE
B and C, below .
Displacement pump worn or damaged Replace. See page 32.
T ails or fingers in spray pattern Pressure setting too low Increase pressure.
Fluid outlet filter is dirty or clogged Clean. See page 12 or manual 307–273.
Spray tip too big or worn Change the spray tip.
Fluid supply is low or empty Refill and prime the pump. See OPERATION,
page
8. Check fluid supply often to prevent run -
ning
the pump dry .
Paint too viscous Thin.
W rong type hose Use minimum 15.2 m, static–free nylon hose
(wire braid hose is unacceptable).
Paint runs or sags Spray tip too big or worn Change the spray tip.
Spitting from gun Air in fluid pump or hose Check for loose connections at pump intake and
tighten. Them prime the pump.
See OPERATION, page 8.
T ip partially clogged Clear.
Fluid supply is low or empty Refill and prime the pump. See OPERATION,
page
8. Check fluid supply often to prevent run -
ning
the pump dry .
Static sparking from the gun Spray or work being sprayed is not prop -
erly
grounded
Correct problem before continuing. Follow the
warning section, FIRE OR EXPLOSION HAZ-
ARD
on page 5.
A. The motor has an over–temperature switch which
automatically
resets upon cooling. If it opens, and the
motor shuts itself off, unplug the power supply cord
and
let the sprayer cool for 30 to 60 minutes. Always
use the lowest pressure setting needed when
spraying.
B. Freezing results from failure to replace the water–
base
paint or flushing water with mineral spirits, and
usually causes permanent damage to the pressure
control.
C. Over–pressurization
results from (1) using less than
15.2 m of nylon spray hose, (2) from using a wire
braid
spray hose, (3) from adding a shutof f device be -
tween
the pump outlet and the spray gun, (4) from at -
taching
a spray hose to the pressure drain valve, or
(5) from using a clogged or incorrectly assembled fil -
ter.