Applications; Maintenance And Service - Enerpac MLC-604 Notice D'emploi

5

APPLICATIONS

ATTENTION: Clamping should occur only during
the piston stroke, never at the end of the stroke.
5.1 Make sure that when clamping occurs the piston still
has a few millimeters of stroke.
5.2 Comply with the recommended torque values for the
assembly screws.
5.3 Check the pressure and capacity of the hydraulic
circuit. NEVER exceed the recommended values.
6 INSTALLATION
IMPORTANT: It is mandatory that the operator
has a full understanding of all instructions,
safety regulations, cautions and warnings,
before starting to operate any of this high force
tool equipment. In case of doubt, contact
ENERPAC.
6.1 The ENERPAC cylinders are hydraulically powered.
Check your particular circuit's characteristic features and pay
close attention to the oil pressure and capacity.
6.2 ATTENTION: An excessive load can damage the
cylinder stem or the clamping surface.
6.3 To mount the cylinders use mounting bolts class
8.8 DIN 912.
ATTENTION: Comply with the recommended torque values.
Always use a hydraulic torque wrench.
IMPORTANT: Purge the hydraulic system before starting
the machine. Air in the circuit causes operational problems.
Advance and retract the cylinder several times avoiding
pressure build-up. Air removal is complete when the
cylinder motion is smooth.
6.4 ATTENTION: Make sure the diameter of the circuit
hosing is proportionate to its length to prevent loss of
system capacity, hampering piston reversal. MLC-cylinders
are spring return. 10 x 1.5 dia. steel tubing is
recommended.
7

MAINTENANCE AND SERVICE

Maintenance is required when wear or oil leakage is
noticed. Periodically inspect all components to detect any
problem requiring service and maintenance. ENERPAC
offers ready-to-use spare parts kits for repair and/or
replacements. See page 14 for spare parts list.
• Regularly inspect all components to detect any problem
requiring maintenance and service. Replace damaged
parts immediately.
• Do not exceed oil temperature above 60 °C.
• Keep all hydraulic components clean.
• Periodically check the hydraulic system for loose
connections and leaks.
• Change hydraulic oil in your system as recommended in
the pump instruction sheet.
IMPORTANT: Hydraulic equipment must only be
serviced by a qualified hydraulic technician.
For repair service, contact the Authorized
ENERPAC Service Center in your area.
8 TROUBLESHOOTING
Only qualified hydraulic technicians should service the
pump and system components. The trouble-shooting table
8.1 is intended to be used as an aid in determining if a
problem exists.
8.1 Troubleshooting diagnosis
PROBLEM POSSIBLE CAUSE
1. Cylinder A. Pump release valve open
doesn't move B. No oil in pump
forward C. Air in the system
D. Poorly screwed joint
E. Hydraulic circuit blocked
2. Cylinder moves A. Oil level in pump too low
only partially B. Piston cylinder seized up
forward
3. Cylinder jerks A. Air in the circuit
forward B. Piston cylinder seized up
4. Cylinder A. Leaky connections
advances B. Kinked circuit hosing
slowly C. Loose joints or connections
5. Cylinder A. Leaky gaskets
advances but B. Leaky connections
looses pressure C. Pump malfunction
6. Cylinder A. Worn or damaged piston
leaks oil B. Leaky connections
C. Internal grooving
7. Cylinder returns A. Pump release valve closed
slowly or not B. Poorly screwed joint
at all C. Blocked circuit
D. Oil pump tank overfilled
E. Cylinder internally or externally
F.
2
damaged
Diameter of circuit tubing too
small for the length