Graco Inc. Series E - Manual (Page 3)

3
307–760
PT2000 PRESSURE ROLLER SYSTEM DESCRIPTION
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 from the suction tube and through 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. Turning 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 17.
Roller Valve
The roller valve controls paint flow to the roller by trigger-
ing it on and off.
Pressure Roller
The pressure roller has a telescoping extension and a
roller cover for use on smooth surfaces. Longer exten-
sions and different types of roller covers are available.
See the ACCESSORIES on page 17.
POWER SUPPLY CORD
Add plug according to
local code
Fig 1
SUCTION TUBE
PRIMING TUBE
INLET VALVE
MOTOR
ON/OFF
SWITCH
PRIMING VALVE
PAINT STRAINER
7.6 M (25 FT) HOSE
460 TO 920 MM (18 TO 36 IN.)
TELESCOPING EXTENSION
LOCKNUT
SPRING GUARD
MUST BE AT
THIS END
ROLLER VALVE
ROLLER FRAME
12 MM (1/2 IN.) NAP
ROLLER COVER