Hydraulic Connections; Maintenance And Service; Troubleshooting Guide - Enerpac VLP Serie Manual De Instrucciones

3.4 Hydraulic Connections

1. Connect the Hose(s) from the Pump to the Cylinder.
2. Tighten all couplers and fittings.
NOTE: Use 1 wraps of Teflon tape on the NPTF threads,
1⁄2
leaving the first complete thread free of tape to ensure that
pieces of tape do not enter the hydraulic system, causing
leakage or damage.
4.0 OPERATION/ADVANCING AND RETRACTING THE
CYLINDER
IMPORTANT: The frameworks of the workshop presses are
exclusively designed for pressing operation, not for pulling. For
pulling applications please contact ENERPAC.
For complete operating instructions refer to the instruction sheets
included with each pump and cylinder.
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.
WARNING: When operating the press, always make sure
the support pins are in their proper location. Failure to
insert these pins properly during usage will result in
equipment damage and possible personal injury. The Bolster
must rest completely on the support pins, and all tension
removed from the winch cable before operating cylinder.
4.1 Hand Pumps
Close release valve, then raise and lower the pump handle to
advance the cylinder to the desired stroke. To retract the cylinder,
open the release valve.
Problem
Cylinder does not advance,
advances slowly or in
spurts
Cylinder advances, but
does not hold pressure
Cylinder does not retract,
retracts part way or
retracts more slowly than
normal

Troubleshooting Guide

Possible Cause
1. Oil level in pump reservoir is low
2. Release valve is open
3. Loose hydraulic coupler
4. Air trapped in system
5. Cylinder plunger binding
1. Leaking oil connection
2. Leaking seals
3. Internal leakage in pump
1. Release valve closed
2. Pump reservoir over filled
3. Loose hydraulic coupler
4. Air trapped in system
5. Cylinder retraction spring broken or
other cylinder damage
6. Additional tooling on cylinder too heavy
4.2 Air Powered Pumps
Depress the pressure side of the treadle to activate the throttle
and advance the cylinder to desired stroke. To retract the cylinder
depress release.
4.3 Air Removal
With the pump positioned higher than the cylinder, advance and
retract the cylinder several times avoiding pressure build-up. Air
removal is complete when the cylinder motion is smooth.
Carefully read the instructions included with the pump and
cylinder for detailed procedures of air removal.

5.0 MAINTENANCE AND SERVICE

Regularly inspect all components to detect any problem requiring
maintenance and service.
1. Replace damaged parts immediately.
2. Do not exceed oil temperature above 140 °F (60 °C).
3. Keep all hydraulic components clean.
4. Periodically check
connections and leaks.
5. Change hydraulic oil in your system as recommended in the
pump instruction sheet.
6. Periodically check the press frame to make sure all bolts are
tight and frame parts are undamaged. Immediately replace
worn or damaged parts with genuine Enerpac parts.
Hydraulic equipment must only be serviced by a qualified
hydraulic technician. For repair contact your nearest authorized
Enerpac Service Center.
1. Add oil to pump
2. Close pump release valve
3. Check that all couplers are fully tightened
4. Remove air according to §4.3 Air Removal
5. Check for damage to cylinder. Have cylinder
serviced by a qualified hydraulic technician
1. Check that all connections are tightened
2. Locate leak(s) and have equipment serviced by
a qualified hydraulic technician
3. Have pump serviced by a qualified hydraulic
technician
1. Open pump release valve
2. Drain oil level to full mark
3. Check that coupler(s) are fully tightened
4. Remove air according to §4.3 Air Removal
5. Have cylinder serviced by a qualified hydraulic
technician
6. Remove tooling, check cylinder for damage
3
the hydraulic system
Solution
for loose