Graco Inc. 223660 - Manual (Page 5)

5 307-730
PT2000 PRESSURE ROLLER SYSTEM DESCRIPTION
SUCTION HOSE
PRIMING TUBE
INLET VALVE
MOTOR
ON/OFF SWITCH
POWER SUPPLY CORD
ROLLER VALVE
PRIMING VALVE
PAINT FILTER
25 FT. (7.6 M) HOSE
18 INCH EXTENSION
9 INCH ROLLER FRAME
ROLLER COVER
0285
Motor
The motor drives the connecting rod which moves the
diaphragm.
Pressure Switch
The pressure switch at the pump outlet turns the motor
on and off to control paint pressure.
Diaphragm
The diaphragm is the heart of the pump. Driven by the
connecting rod and motor , the movement of the dia-
phragm draws paint through the suction hose and to the
outlet valve.
Priming Valve
The priming valve assists in priming the pump during
startup. Turning the priming valve counterclockwise
causes the paint to drain directly back into the pail
through the priming tube. T urning the knob clockwise
causes the paint to flow through the fluid outlet valve and
to the hose, roller valve and extension.
Outlet Valve
The outlet valve has a ball check which prevents paint
from flowing backwards into the pump. This helps keep
an even supply of paint to the roller each time you trigger
the roller valve.
Inlet Valve
As the diaphragm draws paint from the suction tube, the
paint passes through the inlet valve which opens to allow
paint into the pump.
Outlet Hose
The hose has swivel-type couplings for easy assembly.
A larger diameter outlet hose and chemical-resistant out-
let and suction hoses are available. See ACCESSORIES
on page 19.
Roller Valve
The roller valve controls paint flow to the roller by trigger-
ing it on and off.
Pressure Roller
The pressure roller has an 18 inch extension. Two roller
covers, one 1/2 inch nap for smooth surfaces, and one
3/4” nap for semi–rough surfaces, are provided. Different
lengths and adjustable extensions and different types of
roller covers are available. See ACCESSORIES on page
19.