Setup - Graco K Series Instructions Manual

This air-powered ram extruder forces high viscosity
fluids into the intake valve of the fluid pump. Wiper
plates for use with this ram are listed on page 16.
NOTE: Always use Genuine Graco Parts and Acces-
sories, available from your Graco distributor. If you
supply your own accessories, be sure they are ade-
quately sized and pressure rated for your system.
Location
1. Position the ram so the air regulators for the pump
and the ram will be easily accessible. Ensure that
there is sufficient overhead clearance when the
ram is fully raised. Refer to Dimensions on page
19.
2. Using the holes in the ram base (28) as a guide,
drill four holes for 1/2 in. (13 mm) anchors. Refer
to Dimensions on page 19.
3. Check that the ram base is level in all directions. If
necessary, level the base using metal shims.
Secure the base to the floor using 13 mm (1/2 in.)
anchors which are long enough to prevent the ram
from tipping.
NOTE: The ram may also be mounted on portable cart
237–557. See manual 308–567 for details.
Setup of Accessories and Connecting Air
Lines
Refer to Fig. 1.
WARNING
A main air bleed valve (E) and a pump air bleed
valve (H) are required. These accessories help
reduce the risk of serious injury, including fluid
injection and splashing of fluid in the eyes or on the
skin, and injury from moving parts if you are adjust-
ing or repairing the pump.
The main air bleed valve (E) shuts off and relieves
the air to the pump and ram. The ram will hold
pressure if the ram director valve (U) is in the
horizontal (neutral) position. To relieve air pressure
in the ram, close the main air bleed valve (E) and
move the director valve (U) to DOWN. The ram will
slowly drop.
The pump air bleed valve (H) relieves air trapped
between it and the pump after the air is shut off.
Trapped air can cause the pump to cycle unexpect-
edly. Locate the valve close to the pump.

Setup

The main air bleed valve (E) is required in your
system to shut off the air supply to the pump (A)
and ram (B) (see the WARNING at left). When
closed, the valve will bleed off all air in the ram and
pump, and the ram will slowly drop. Be sure the
valve is easily accessible from the pump, and is
located upstream from the air manifold (F).
The pump air bleed valve (H) is required in your
system to relieve air trapped between it and the air
motor when the valve is closed (see the WARNING
at left). Be sure the valve is easily accessible from
the pump, and is located downstream from the air
regulator (G).
The air regulator (G) controls pump speed and
outlet pressure by adjusting the air pressure to the
pump (A). Locate the regulator close to the pump,
but upstream from the pump air bleed valve (H).
The air manifold (F) has a swivel air inlet. To
supply air to the ram, connect a hose (EE) between
an auxiliary port of the air manifold and the ram air
inlet.
The ram air regulator (T) controls the air pressure
to the ram.
The ram director valve (U) controls the raising
and lowering of the ram.
The air release valve (V) opens and closes the
flow of air to assist raising the wiper plate (C) out of
an empty pail.
Assembling Model 222–781 Ram
NOTE: Model 222–781 Ram requires the assembly of
an extension tube which allows Model 206–450 Ram
to be used with Check-Mate
parts drawing on page 10.
1. Unscrew the cap nut (13) from the piston rod (20).
Remove the lockwasher (7). Lift the pump support
(18) off the ram.
2. Install the extension tube (105) on the piston rod
(20). Align the holes in the rod and tube, and install
the capscrew (104) through the holes. Secure with
the nut (103).
3. Install the pump support (18) on the extension tube
(105), and secure with the lockwasher (7) and cap
nut (13).
4. Install the ram as explained above.
Pumps. Refer to the