Graco Inc. 307760 ユーザーズマニュアル

3

The motor drives the connecting rod which 
moves the diaphragm.

The pressure switch at the pump outlet turns the motor
on and off to control paint pressure.

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.

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.

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.

As the diaphragm draws paint from the suction tube the
paint passes through the inlet valve which opens to allow
paint into the pump.

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.

The roller valve controls paint flow to the roller by trigger-
ing it on and off.

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.