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Operation
The pump is designed to operate at 10,000 psi. For
continuous service, such as production work, the
pressure intermittently, should not exceed 6,000 psi.
This limitation is for the protection of the motor only.
Before operating the pump, check the following proce-
dures to assure proper service:
1. Check proper power connections and tightness of
hose connections before starting pump.
2. Check hydraulic oil with dip stick (53). Oil should be
within 1/2" of reservoir top.
3. Start motor and allow pump to idle a few minutes.
This will allow the hydraulic oil to work into moving
parts and give prime to pump.
Service
Filling the Oil Reservoir
In order for the pump to operate properly, the oil
reservoir must be kept filled with a good grade of light
hydraulic oil: Greenlee 905 0806.8 hydraulic oil or
equivalent. Eight quarts are required, of which 6-1/4
quarts are usable. A minimum of 1-3/4 quarts must be
at the bottom of the reservoir at all times during the
operation. Be sure that the complete operation does not
require more than the usable amount of oil.
Do not use synthetic fluids with poor lubricating
qualities such as brake fluids. The result is perma-
nent damage to the pump.
To refill or add oil to the reservoir, proceed as follows:
1. Remove vent unit from top of reservoir.
2. Add oil to within 1/2" of top of reservoir when ram is
retracted.
3. Install vent unit securely.
Before operating pump, be sure vent unit is not
clogged.
Greenlee Textron / Subsidiary of Textron Inc.
1721-M4 Basic & 1722-M4 Basic Hydraulic Power Pumps
Flushing the System
As long as the pump is used as outlined in the operating
instructions, trouble-free performance can be expected.
To maintain this performance, it is absolutely essential
that dirt or other foreign matter be kept out of the sys-
tem, as this is the most common cause of hydraulic
system failure. When opening the pump for any reason,
such as making pipe connections, adjusting pressure or
any repair, exercise extreme care in cleanliness and use
clean tools and cloths. If at any time dirt is suspected to
have entered the system, the entire oil system should be
flushed as follows:
1. Drain oil from reservoir.
2. Fill reservoir with any recommended flushing oil or
3. Drain flushing oil or kerosene from reservoir and
Motor Maintenance
Greenlee recommends the 1721-M4 and 1722-M4 be
sent to a qualified Greenlee Service Center or to the
manufacturer when in need of repair.
5
clean kerosene and operate pump. Work the control
handle back and forth several times during flushing
to wash all foreign particles from the control valve
unit.
Do not operate pump for long periods of time. The
system is not designed to operate with flushing oil
or kerosene.
refill with new oil.
4455 Boeing Dr., Rockford, IL 61109-2988
815/397-7070
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