8
opened. When the valve is closed, Air Motor builds
up a back-pressure and stops operating the pump-
ing section.
PRESSURE RATIO of the pump states the ratio
of the output grease pressure to the incoming
air pressure. When the pressure ratio is 50:1, we
achieve an output grease pressure up to 7500 PSI
(500 BAR) when the incoming air pressure is 150
PSI (10 BAR ).
OPERATION INSTRUCTIONS
WORKING OF PUMP
UPSTROKE
When grease control valve is opened, compressed
air enters at arrow A and passes through passage
B to the underside of the piston C, driving the pis-
ton C and piston rod D upwards.
The air above the
piston is evacuated
through passage E,
past the slider valve
F and out at arrow
G. The piston ap-
proaches top dead
centre and piston
rod d makes con-
tact with the slider
rod H. Now the
slider rod H starts
moving up with the
piston rod D.
DOWNSTROKE
The incoming air is now led via passage E to the
upper side of piston C, driving it and the piston
rod D downwards. The air under the piston C is
evacuated through passage B, past the slider valve
F and out at arrow G.
The piston ap-
proaches bottom
dead centre and
piston rod D makes
contact with the
slider rod H. When
slider rod H passes
its centre position,
the pusher spring I
and pusher button
J snap it over to its
lower position.
The air motor repeats Upstroke & Downstroke
in continuous cycle to produce a reciprocating
motion, driven by compressed air. This motion
is transferred via a connecting rod to the piston
in the Pumping Section. During every upstroke,
non return valves (with spring & ball check) get
opened & the piston lifts the grease. During every
downstroke, non return valves get closed & the
piston discharges grease from the outlet valve.
Closing the Grease Control Valve shuts off the air
motor & pump stops dispensing grease.
INSTALLATION
NOTE: An FRL (Filter-Regulator-Lubricator) unit
must be used in the Air supply, before it is con-
nected to the pump. Set the regulator to 6 BAR (90
PSI) or any required inlet pressure, but never more
than 150 PSI (10 BAR) or less than 30 PSI (2 BAR).
1. Fill the drum with
Grease leaving empty
space of about 2” from
the top rim. Shake the
drum after it is filled
to remove air pockets.
Place the follower plate
in the grease drum with
the lift handle facing
upwards.
Push the follower plate down, until some grease is
forced through the centre hole on the plate.
2. Place the drum cov-
er on the drum. Lift
the pump assembly &
slide the suction tube
through the drum cover
& centre hole in the fol-
lower plate.
3. Push the pump as-
sembly down till the
bottom of the pump
touches the base of the
drum. Adjust the drum
cover and tighten it
with the thumb screws
provided along with
the drum cover.
4. Tighten the drum
cover with the pump
suction tube with the
help of thumb screws.
