Duff-Norton RAM-PAC - Page 6

OPERATING
INSTRUCTIONS
All
RAM -PAC units
consist of the
following components:
A.
B.
C.
D.
Pump
Ram
Hydraulic Hose
Quick Disconnect
Coupling
NOTE:
The
following standard
accessory
items are
readily
available:
hydraulic
gages, gage
adapters, pipe tees,
close
nipples,
shut-off
valves,
check
valves and
manifolds.
These components are packaged
and shipped
separately. It is very important that these compo-
nents be assembled properly ;
otherwise, the RAM -
PAC
units may not operate satisfactorily. The pumps
are shipped with
a full compliment of
hydraulic oil,
but
the hydraulic hose
and rams
contain air only.
It is
necessary to remove
this air before the
RAM -
PAC unit
will operate
properly. If
the air is not
bled
from the hose
and the
ram, the
unit will be
air lock -
1
2
3
Turn the pump
so that the
pipe plug is facing
up. Remove the
3 / 8 " plug which
is located
in
the end of the
pump body. Use a
1 / 2 "
square socket
wrench to remove
this plug.
Inspect the pipe thread on the pump and re-
move
any foreign matter.
Inspect
the male threads of
the hose end and
remove any foreign
matter. Apply a few
drops of Permatex No. 2 or a similar non -
hardening
pipe thread compound to assure a
leak -proof joint.* (See
also Note 13,
Page 7)
4 Screw the hose end into the pump and pull
up the connection tightly
with a
wrench
but
do not force it.
5
The air may be bled from the hydraulic hose
before it is connected to the ram by connect-
ing the quick disconnect coupling (hose half
and ram half) to the end of the hose to open
the valve in the coupling and then pumping oil
until it starts to flow
out of the coupling.
This forces the air from the
hydraulic hose
and also flushes out any dirt that
may have
gotten into it. After a small quantity of oil
has flowed through the hose and coupling,
stop pumping and remove the ram -half cou-
pling
from
the
hose.
The check
valve
on
the
ed
and it will be
very difficult to
pump oil into
the
ram. The large
number of strokes
required to com-
press the air
sufficiently to raise the
ram plunger
may make it appear
that the RAM -PAC unit is
faul-
ty. This condition is more
pronounced on the tall,
spring returned rams
than it is on the shorter, non -
spring
returned rams. This difficulty can be comple-
tely eliminated if the following procedure is
followed:
6
7
hose -half
coupling will
keep the
oil in the
hose.
The
pump
and the
hydraulic
hose are
now
ready
for
operation.
The
3 / 8 "
pipe
plug
should now be removed
from
the ram and
the pipe
threads should
be
inspected. Follow
points 1,
2, 3, and 4
as
outlined above.
After the ram -half
coupling is assembled to
the
ram, connect
both halves
of
the
quick
connect coupling
which can readily be
done
by hand when
there is no pressure in the
hose.
In
the
ease
of single
acting rams,
pump the ram up to nearly
its fully
extended height with no load on it.
Invert the ram, and
hold the pump
in a position elevated above the ram;
turn the bleeder screw
on the pump
to the
open position and
then step
on the ram to
force it back
into its
closed position.
This will
force the
air
from the ram
back into
the air
space in
the pump
reservoir.
Turn
the ram
right side
up; and
for the
tall
rams
repeat this
operation
to
make
sure that
all of
the air
has
been bled
from
the ram.
In
the
case of double acting
rams,
bleeding is
accomplished
by
placing
the ram
on its
side
with ports
facing
up.
Extending
and
retracting
of the
ram
will
allow
air
bubbles
to
escape
up
through the ports
if
hoses
and
cal
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