3
307-711
PT2500 SPRAYER DESCRIPTION
PRESSURE CONTROL KNOB
OPEN
Counterclockwise
CLOSE
Clockwise
1/4 npsm(m) OUTLET
DIAPHRAGM
PAINT PUMP
PAINT HOSE
REVERSE-A-CLEAN
TM
IV
DripLess
TM
TIP GUARD
AND SwitchTip
TM
SPRAY TIP
BLACK MAX
TM
SPRAY GUN
STRAINER
MOTOR
HYDRAULIC PUMP
ON/OFF SWITCH
HYDRAULIC OIL FILL CAP
INCREASE
Clockwise
DECREASE
Counterclockwise
BYPASS VALVE
0266
0267
0270
DRAIN TUBE
Motor
The sprayer has a 1/2 HP, 120 V, 60HzAc, single phase,
1725 rpm motor. The motor is supplied with a three-wire
power supply cord and a three-prong plug. The sprayer
ON/OFF switch is located on the box on the side of the
motor. The motor’s function is to drive the hydraulic
pump. The motor runs continuously when it is turned on
to keep the paint at the desired pressure.
Paint Pump
The paint pump is immersed directly into a 5 gallon paint
pail, so the pump is actually being pressure fed without
the mess and trouble of pouring paint into a hopper.
Hydraulic Pump
The hydraulic pump is located inside the hydraulic reser-
voir. The motor drives an eccentric bearing which pushes
the piston in and out of the hydraulic pump. The pump re-
ciprocates the hydraulic fluid to operate the diaphragm.
Diaphragm
The diaphragm separates the hydraulic and paint por-
tions of the paint pump. Hydraulic oil causes the dia-
phragm to move up and down almost 30 times per sec-
ond, no matter what pressure you are spraying at.
Pressure Control Knob
The paint pressure is regulated by turning the pressure
control knob clockwise to increase pressure and
counterclockwise to decrease pressure.
Bypass Valve
The bypass valve has two functions: (1) to assist in prim-
ing the paint pump during initial startup, and (2) to provide
positive relief of paint pressure from the gun, hose and
sprayer.
Paint Hose
One electrically conductive nylon paint hose is supplied
with sprayer Model 218–501. This 25 ft. (7 m) hose has
a 1/4 in. ID, 1/4 npsm(fbe) couplings and spring guards
on both ends.
Spray Gun, Reverse-a-clean IV Tip Guard
And Spray Tip
The spray gun supplied with Model 218–501 has a tough,
lightweight plastic body. The gun has a trigger safety le-
ver which prevents accidentally triggering the gun when
the lever is set in the safe position. (See WARNINGS,
page 4.)
The Reverse-A-Clean IV Tip Guard uses high pressure
fluid to unclog the spray tip without removing it from the
gun. (See page 12.) It includes a safety tip guard which
helps reduce the risk of a fluid injection injury. A No. 315
spray tip for use with latex paint is also included.
