Enerpac LPL-Series, Инструкция

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the desired amount. Then, operate pump and valve so that
hydraulic oil is directed at a controlled rate from the cylinder
coupler back to the pump reservoir.
Note that additional hydraulic components may be required to
control the rate at which the plunger retracts under load.
NOTICE
LPL-Series cylinders contain no plunger return
spring. External force will be required to fully retract the
plunger if it is not under load. A hydraulic pump equipped with
a vacuum valve will help aid plunger retraction.
9.0 INSPECTION, MAINTENANCE & STORAGE
• Periodically check the hydraulic system for loose
connections leaks and obvious problems. Replace any
damaged components immediately.
• Monitor the hydraulic oil temperature during operation. Do
not exceed oil temperatures above 150°F [65°C].
• Install dust caps and plugs on all hydraulic couplings after
the hydraulic hose is disconnected from the cylinder.
• Keep all hydraulic components clean.
• Periodically check that the orifice at the plunger stroke
limiter port is free of dirt or other obstructions.
• Periodically check the tilt saddle for free movement. If
Troubleshooting Guide
Symptom Possible Cause Solution
1. Plunger will not
advance.
a. Pump release valve open. Close pump release valve.
b. Directional control valve not in proper position. Shift directional control valve to proper position.
c. Coupler not fully tightened. Tighten coupler.
d. Pump oil level is low. Add oil to pump reservoir as required. See Section 6.2.
e. Pump malfunctioning. Repair or replace pump as required.
f. Cylinder load rating too low for application. Use a cylinder with a higher load rating.
g. Cylinder seals leaking. Repair or replace cylinder.
2. Plunger advances
only part way.
a. Oil level in pump is low. Add oil to pump reservoir as required. See Section 6.2.
b. Coupler is not fully tightened. Tighten coupler.
c. Cylinder plunger binding. Repair or replace cylinder.
3. Plunger advances
erratically.
a. Air in hydraulic system. Remove air from hydraulic system. See Section 6.4.
b. Cylinder plunger binding. Repair or replace cylinder.
4. Plunger advances
more slowly than
normal.
a. Leaking connection. Repair leaking connection.
b. Coupler not fully tightened. Tighten coupler.
c. Pump malfunctioning. Repair or replace pump as required.
5. Plunger advances, but
will not hold.
a. Pump malfunctioning. Repair or replace pump as required.
b. Leaking connection. Repair leaking connection.
c. Incorrect system set-up. Check hose connections at pump and cylinders.
d. Cylinder seals leaking. Repair or replace cylinder.
6. Cylinder leaks oil. a. Loose connection. Tighten or repair connection.
b. Oil flowing from plunger stroke limiter port.
(plunger has exceeded maximum stroke)
Stop advancing plunger immediately when maximum
stroke indicator line appears.
c. Worn or damaged cylinder seals. Repair or replace cylinder.
d. Internal cylinder damage. Repair or replace cylinder.
7. Plunger will not retract
or retracts more
slowly than normal.
a. Pump release valve closed. Open pump release valve.
b. Directional control valve not in proper position. Shift directional control valve to proper position.
c. Lock nut not loosened. Loosen lock nut a sufficient amount of turns.
d. Pump reservoir is overfilled. Drain oil from pump reservoir as required.
e. Improper hose connections. Check hose connections.
f. Narrow hose restricting oil flow. Replace with larger diameter hose.
g. Cylinder plunger binding and/or internal damage. Repair or replace cylinder.
required, disassemble, clean and lubricate the tilt saddle.
Use white lithium grease.
• Change the hydraulic oil at the recommended interval shown
in the pump instruction sheet. Change the oil immediately if
contamination is suspected.
• Store cylinders in the vertical position, in a clean, dry and
secure location. Keep stored cylinders and hoses away
from heat and direct sunlight.
• If repairs are required, refer to the Enerpac website for the
repair parts sheet applicable to your cylinder model.
NOTICE
Hydraulic equipment must only be serviced by a
qualified hydraulic technician. For repair service, contact the
Enerpac Authorized Service Center in your area.
10.0 TROUBLESHOOTING
Refer to the troubleshooting guide when diagnosing cylinder
operational problems. Please note that the troubleshooting
guide is not all-inclusive, and should be considered only as
an aid to help diagnose the most common possible problems.
For repair service, contact your nearest Enerpac Authorized
Service Center. As required, also refer to the troubleshooting
information provided with your hydraulic pump or power unit.