3.0 INSTALLATION
1. Make hydraulic connections. Use a pump
with a release valve or a 3-way valve and
one hose for single-acting cylinders
(1)
.
Use a pump with a 4-way valve and two
hoses for double-acting cylinders
(2)
.
IMPORTANT
: Double-acting cylinders must
have both couplers connected.
Fully hand-tighten all couplers. Loose
coupler connections will block the flow of
oil between the pump and the cylinder.
2. Remove air from the cylinder as shown
below.
Single-acting cylinders: Position the
cylinder so that the plunger is pointed down
and the cylinder lower than the pump. Fully
extend and retract the cylinder 2 or 3 times.
Double-acting cylinders: Lay the cylinder
on its side and have the couplers facing up.
Fully extend and retract the cylinder 2 or 3
times.
NOTE
: Collar threads are rated for the full
capacity of the cylinder when fully engaged in
attachments.
NOTE
: The use of cylinder attachments or
extensions reduces the cylinder capacity by
at least 50%.
4.0 OPERATION
Operate the hydraulic pump to advance
and retract the cylinder. Some single-acting
cylinders are spring-return, others are load-
return. The speed of retraction is affected by
the length of the hose and other restrictions in
the line. Double-acting cylinders are powered
in both directions by the pump.
The cylinder stop ring is designed to take the
full load. However, to reduce cylinder wear,
use less than full stroke when possible.
NOTE
: Manufacturer’s rating of load and
stroke are maximum safe limits. Good practice
encourages using only 80% of these ratings!
5.0 MAINTENANCE
1. Use only Enerpac oil with these cylinders.
The use of any other oil may invalidate your
warranty.
2. Use dust caps when cylinders are
disconnected from the hose. Keep entire
cylinder clean to prolong cylinder life.
3. Store cylinders upright to prevent seal
distortion.
6.0 TROUBLESHOOTING
See Troubleshooting Chart on page 4.
These cylinders should be repaired only by
Authorized Enerpac Technical Service Centers.
Single-acting cylinders are spring-loaded and
require special disassembly techniques to
prevent personal injury.
3
A
B
air
air
