Operating Instructions
Form No. 102355
Figure 4
Figure 5
Automatic Valve
(use with single-acting cylinders only)
NOTE: Pumps with an automatic valve do not have a valve handle. The valve is built into the unit and should
be used only with single-acting cylinders.
1. Place the cylinder lower than the level of the pump.
2. Start the motor to extend the cylinder. When the cylinder reaches the end of its stroke, stop the motor. The
cylinder automatically returns.
3. Extend and return the cylinder several times to remove air from the hydraulic system.
PREVENTIVE MAINTENANCE
WARNING: To help prevent personal injury, disconnect the pump from the power supply before
performing maintenance or repair.
Periodic Cleaning
IMPORTANT: The greatest single cause of failure in hydraulic pumps in dirt. Keep the pump and attached
equipment clean to prevent foreign matter from entering the system.
1. Use only clean hydraulic oil, and change oil after every 300 hours of use.
2. Seal the hydraulic oil outlet and all unused couplers with thread protectors when the pump is not in use.
Three-Way Valve
(use with single-acting cylinders)
1. Place the valve handle in the neutral position as shown in
Figure 4.
2. Jog the motor toggle switch several times. Place the switch
on RUN, and let the pump idle for a few minutes.
3. To advance the cylinder, position the valve handle as shown
in Figure 4. Place the valve handle in neutral again to stop
the cylinder and hold pressure.
4. To retract the cylinder, position the lever as shown in Figure
4. Place the valve handle in neutral to stop the cylinder.
5. Place the cylinder at a lower level than the pump. Advance
and retract the cylinder several times to remove air from the
hydraulic system.
Four-Way Valve
(use with double-acting cylinders)
WARNING: To help prevent personal injury, the
retract port on a double-acting cylinder must be
unrestricted when extending the cylinder.
1. Place the valve handle in the neutral position as shown in
Figure 5.
2. Jog the motor toggle switch several times. Place the switch
on RUN, and let the pump idle for a few minutes.
3. To advance the cylinder, position the valve handle as shown
in Figure 5.
4. To retract the cylinder, position the lever as shown in Figure
4. Place the valve handle in neutral to stop the cylinder.
5. Place the cylinder at a lower level than the pump. Advance
and retract the cylinder several times to remove air from the
hydraulic system.
Sheet No. 2 of 4
Rev. 2 Date: 24 August 2009
