Introduction - Graco ULTRA 500 Instructions-Parts List Manual

ULTRA" 500 BASIC COMPONENTS
Model 231-041 shown
n
PRESSURE CONTROL KNOB
ELECTRIC MOTOR
FLUID FILTER
DRIVE ASSEMBLY
FLUID
ounm
PAILHANGER
DISPLACEMENTPU
CIRCUIT BREAKER
RESET BUlTON
ONlOFFSWITCH
PRESSURE RELIEFVALVE
MAIN FLUID HOSE
Your new Ultra" 500 Sprayer functions and operates
w i l l help
you
become familiar with the sprayer before
differently than other airless paint sprayers. This section
operating
it.
Preasure Control
'fhe
pressure control includes an ON/OFF switch for the
sprayer, the pressure adjusting control knob, a pressure
with a
manual reset button. Ita function is to control the
sensing device, and a current overload circuit breaker
fluid pressure at the pump outlet.
motor speed so that the sprayer maintains constant
Motor
The DC motor has sealed bearings and replaceable
motor brushes. I t s function is to drive the displacement
pump at the rate needed to supply sufficient paint
volume
at
the selected pressure.
Working together, the pressure control and motor
cause the pump to cycle whenever there is fluid or
pressure demand. When the pump is cycling, the motor
sounds like
an
automobile starter cranking. When the
pump is not cycling, the motor hums, hums intermit-
will atill be power to the sprayer and
it
will stay
tently, or appears to have shut itself off. However, there
pressurized and ready to use unless you manually shut
it
off and relieve pressure:
voltage or voltage fluctuations than an AC motor, and a
Because the motor is DC, it is less sensitive to low
heavy gauge extension cord o f up to 150 feet (45 m)
can be used.
The sealed drive assembly transfers power from the DC
Drive Assembly
motor to the displacement pump.
Displacement Pump
The positive displacement, volume-balanced pump pro-
vides equal fluid delivery on both the up and down
filled with Graco Throat Seal Liquid, helps prevent
pump strokes. The pump has a wet-cup which, when
damage to the throat packings end piston rod.
Fluid Filter
The fluid filter provides the final paint straining to help
avoid clogs in the hose and spray tip. The filter includes
a reusable element and a pressure relief valve for reliev-
ing fluid pressure when shutting off the sprayer.
The grounded, nylon spray hoses have spring guards on
Hoses
both ends. The 50 foot (15.2 m) hose has a 114 in. ID.
The 3 foot (0.9 m), 3/16 in. ID whip hose allows flexi-
ble gun movement. The nylon hose material acts as a
pulsation dampener to absorb pressure fluctuations.
Spray Gun b RAC IV DripLessTM Tip Guard
which prevents accidental triggering when
it
is engaged
Graco high pressure spray guns have a trigger safety
(see Fig 1). The Reverse-A-Clean IV SwitchTipTM uses
high pressure fluid to remove clogs from the spray tip
without removing
it
from the gun.
It
includes a safety tip
guard which helps reduce the risk of fluid injection in-
iuw.
Fig 1