Enerpac MS-Series pumps - Manual (Page 7)

7.1 Adding Oil to the Pump
Check oil level regularly.
WARNING: Always add oil with
cylinders fully retracted (extended if
pull cylinders) or the system will contain
more oil than the reservoir can hold.
1. Remove vent/fill cap from reservoir.
2. Fill reservoir only to level mark shown on pump.
3. Remove air from system if necessary. See page 6.
Recheck oil level after removing air.
4. Return vent/fill cap to proper position.
NOTE: Non-vented hand pumps require air in the
reservoir to function properly. If the reservoir is
completely filled, a vacuum will form preventing
oil from flowing out of the pump.
7.2 Keeping Oil Lines Clean
When coupler halves are disconnected, always screw
on dust caps. Use every precaution to guard unit
against entrance of dirt because foreign matter may
cause pump, cylinder, or valve failure.
7.3 Lubricating the Pump
To extend pump life and improve performance,
lubricate the beam pin (A), cross pin (B), and piston
head (C) regularly, using roller bearing grease. See
Figure 10.
Figure 10
7.4 Changing the Oil
1. Drain all oil and refill with clean Enerpac oil every
12 months. If pump is used in dirty environments,
change the oil more often.
2. Remove vent/fill cap or plug from reservoir.
3. Tilt pump to drain out old oil.
4. Fill reservoir only to level mark shown on pump.
5. Replace the vent/fill cap or plug.
6. Dispose of used oil properly.
8.0 TROUBLESHOOTING GUIDE
The following information is intended as an aid in
determining if a problem exists. For repair service,
contact the Authorized Enerpac Service Center in
your area.
7
TROUBLESHOOTING
Problem Possible Cause Solution
Cylinder does not
advance, advances
slowly, or advances in
spurts.
Cylinder advances, but
does not hold pressure.
Cylinder does not retract,
retracts part way, or
retracts more slowly than
normal.
1. Oil level in pump reservoir is
low.
2. Release valve open.
3. Loose hydraulic coupler.
4. Load is too heavy.
5. Air trapped in system.
6. Cylinder plunger binding.
1. Leaking connection.
2. Leaking seals.
3. Internal leakage in pump.
1. Release valve closed.
2. Pump reservoir is over-filled.
3. Loose hydraulic coupler.
4. Air trapped in system.
5. Hose I.D. too narrow.
6. Cylinder retraction spring
broken or other cylinder
damage.
1. Add oil according to the Maintenance instructions on
page 6.
2. Close the release valve.
3. Check that all couplers are fully tightened.
4. Do not attempt to lift more than rated tonnage.
5. Remove air according to the instructions on page 6.
6. Check for damage to cylinder. Have cylinder serviced by
a qualified hydraulic technician.
1. Check that all connections are tight and leak free.
2. Locate leak(s) and have equipment serviced by a
qualified hydraulic technician.
3. Have pump serviced by a qualified hydraulic technician.
1. Open release valve.
2. Drain oil level to full mark. See page 7 instructions for
adding oil.
3. Check that all couplers are fully tightened.
4. Remove air according to the instructions on page 6.
5. Use larger diameter hydraulic hose.
6. Have cylinder serviced by a qualified hydraulic
technician.