Enerpac SFP-Series - Manual (Page 5)

Now the machine is able to work. Use the manual
valves to move the cylinders as explained in the
paragraph 5.1.
5.4.2 Pumps with solenoid valves
To turn the motor on following the next steps:
1. Turn the main switch (Nr 1) to the right on the
electrical cabinet
2. Deactivate the emergency stop button (on the
pendant).
3. Press the reset button to reset the security system
after the emergency button have been activated (Nr 4)
4. Press the motor starter button for 3 seconds (Nr 3)
Now the machine is able to work with the pendant. Use
the pendant to move the cylinders as explained in the
paragraph 5.2.
5.5 Setting up the relief valve
The powerpack has been designed to set the
relief valves up by the operator. The maximum
pressure of the relief valve is between 10 and
700 bar. For this propose the operator needs
the next tools:
1. Plain slot screwdriver (1 unit)
2. Spanner of 13 mm (1 unit)
3. Manometer 0-1000 bar (for pressures up to 700 bar)
(4 units).
Manometers must be connected to the MP port (1/4”
NPT), in order to know the pressure in each line.
To set the relief valve up, follow the next steps:
1. Connect the output to one cylinder
2. Unblock the hexagonal nut of the relief valve.
3. Turn the bolt with the screwdriver totally (counter
clockwise)
4. Turn the bolt a quarter turn in order to open the relief
valve (clockwise)
5. Press the motor starter button for 3 seconds (Nr 3)
6. Extract the cylinder plunger up to final. (When the
plunger reaches the final of the stroke the pressure
gets up. See in the manometer the maximum pressure
reached).
7. Turn the bolt (counter clockwise to decrease the
pressure, or clockwise to increase the pressure) with
the screw driver to reach the desired pressure.
8. Block the nut with the spanner to block the relief
valve.
5.6 Decompressing system
With the motor switched off:
1. Select cylinders to decompress in the pendant
2. Push decompress button in the electric cabinet
3. Push at the same time the button up in the pendant
The solenoid valve will move to leave free way to the
pressurized line.
6.0 MAINTENANCE
6.1 Check Oil Level
Check the oil level of the pump prior to start-up, and
add oil, if necessary, by removing the fill port cap.
Always be sure cylinders are fully retracted before
adding fluid to the reservoir.
6.2 Change Oil and Clean Reservoir
Enerpac HF oil is a crisp blue color. Frequently check
oil condition for contamination by comparing pump oil
to new Enerpac oil. As a general rule, completely drain
and clean the reservoir every 250 hours, or more
frequently if used in dirty environments.
NOTE: This procedure requires that you remove the
pump from the reservoir. Work on a clean bench and
dispose of used oil according to local codes.
1. Unscrew the bolts holding the cover plate to the
reservoir and lift the pump unit out of the reservoir. Be
careful not to damage the filter screen.
2. Pour all oil out of the reservoir.
3. Thoroughly clean the reservoir and reservoir magnet
with a suitable cleaning agent.
4. Reassemble the pump and reservoir
5. Fill the reservoir with clean Enerpac hydraulic oil.
The reservoir is full when oil level is in middle of the
sight gauge
6.3 Changing the Filter Element
The filter element should be replaced every 250 hours,
or more frequently in dirty environments. The filter
manifold is equipped with a 25 psi (1,7 bar) bypass to
prevent over pressure rupture if filter plugging occurs
and with a small gauge that shows the pressure when
the filter is dirty (see in the hydraulic diagrams num 8).
7.0 TROUBLESHOOTING GUIDE
Only qualified hydraulic technicians should service the
pump or system components. A system failure may or
may not be the result of a pump malfunction. To
determine the cause of the problem, the complete
system must be included in any diagnostic procedure.
Refer to the troubleshooting chart for a list of typical
cylinder problems and possible causes. The
troubleshooting chart is not all-inclusive, and should be
considered only as an aid to help diagnose the most
common problems. For repair service, contact your
local Authorized Enerpac Service Center.
5