Enerpac SP-Series - Manual (Page 3)

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3.0 PRODUCT DESCRIPTION
This Enerpac Hydraulic Punch is designed to perforate
metal with round, square or oblong holes. The punch can
be ordered separately (SP-35) and as a matched set (SP-
35S or MSP-351). SP-35S is the imperial Punch Set, the
MSP-351 is the metric Punch Set. See table 1 for punch
specifications. The MSP-351 Punch Set consists of SP-35
Hydraulic Punch with SPD-375, SPD-438, SPD-531 and
SPD-688 Punches and Dies. The SP-35S consists of SP-
35 Hydraulic Punch with SPD-438, SPD-563, SPD-688
and SPD-813 Punches and Dies. See table 2. The
Enerpac hydraulic punch may be operated by hand
pumps, air/hydraulic, gas or electric driven pumps,
producing up to 700 bar/10,000 psi pressure.
ATTENTION: When using the largest punch size with 1/2"
(13mm) thick steel, the shear strength of the steel must be less
than or equal to A-7 (St.37). Higher shear strength material can
be punched when using smaller dimension punches or thinner
material. Contact Enerpac for specific recommendations.
4.0 OPERATING INSTRUCTIONS
Guidelines listed below will help ensure safe operation and
aid in prolonging tool life:
1. Do NOT exceed maximum punch limits shown on the
tool decal. This punch is compatible with pumps
designed for 700 bar/10,000 psi maximum operating
pressure.
2. Keep punch and dies clean. Lubrication is not required,
but will help extend punch and die life.
3. Always match the punch and die correctly. Install dies
with the larger opening facing down. Changeover tools
are included with each punch. These can also be
ordered separately under model number SP-10K.
4. Protect punch and die sets. Return them to the storage
case after use.
5. Enerpac hydraulic oil is recommended for punch and
pump system.
6. Cracked, chipped or worn punches and dies should be
replaced immediately. Refer to punch and die selection
chart for replacement parts.
4.1 Punch and Die Replacement
1. Remove punch from upper jaw using the pin tool to
loosen the cap nut. S ee photo 1: The pin tool is placed
in the hole in the cap nut, then used as a lever to rotate
the cap nut counterclockwise and loosen the nut.
Remove the cap nut and extract the punch.
2. Loosen set screw on the main frame lower jaw using the
allen wrench supplied with the punch. See photo 2.
3. Remove the die from the lower jaw. Install a die with
larger opening facing down and the indexing slot
towards the set screw. Tighten the set screw.
CAUTION: Indexing slots are used with square and
oblong dies to keep them aligned with the matching
punch.
IMPORTANT: Square and oblong punches must be
installed using the square key provided with the
punch. The square key must engage the slot of the
punch plunger which is orientated front to back with the
punch. See photo 3. Do NOT use the square key when using
round punch.
4. Install the punch with the long stem facing downward.
5. Before using the punch, check to make sure the set
screws and cap nut are tightened securely.
6. See photo 4: Advance the punch to the die and check
for proper alignment. The punch should pass freely
through the die. Minor adjust-mentsof the die are
possible by loosening the die, adjusting the position
and re-tightening the set screw.
IMPORTANT: During the punching operation,
periodically check the cap nut to ensure that it
remains tight. Also remove slugs from the punch to
prevent damage to the mounting bracket.
5.0 MAINTENANCE AND SERVICE
Maintenance is required when wear and/or leakage is
noticed. Occassionally inspect components to detect any
problem requiring service and maintenance. Enerpac
offers ready-to-use spare parts kits for repairs and/or
replacements. Repair parts sheets are available. Contact
Enerpac.
TROUBLESHOOTING GUIDE
Problem Possible Cause Problem Possible Cause
A. Pump release valve open
B. No oil in pump
C. Air bound
D. Couplers not fully tightened
E. Blocked hydraulic line
F. Broken spring in cylinder
A. Oil level in pump too low
B. Cylinder’s plunger binding
A. Air in hydraulic system
B. Plunger binding
A. Leaking connection
B. Restricted hydraulic line
C. Loose coupler or fitting
D. Pump malfunction
1. Cylinder will not
advance
2. Cylinder advances
partly
3. Cylinder advances in
spurts
4. Cylinder advances
slower than normal
5. Cylinder advances but
will not hold pressure
6. Cylinder leaks oil
7. Cylinder will not retract
or retracts slower than
normal
A. Seals leaking
B. Leaking connection
C. Pump malfunction
A. Worn or damaged plunger
B. Leaking or loose connection
C. Internal leakage
A. Pump release valve closed
B. Coupler not fully closed
C. Blocked hydraulic line
D. Pump reservoir over-filled
E. Cylinder damaged internally or externally