Enerpac JH Premium User manual

CONTENTS:
IMPORTANT RECEIVING INSTRUCTIONS:
DESCRIPTION:
English (EN) ....................................................................1-4
Deutsch (DE) ..................................................................5-10
Français (FR) .................................................................11-16
Español (ES) .................................................................17-22
Italian (IT) ....................................................................23-28
Nederlands(NL)...............................................................29-33
Visually inspect all components for shipping damage. If any shipping damage is found, notify carrier
at once. Shipping damage is NOT covered by warranty. The carrier is responsible for all repair or
replacement costs resulting from damage in shipment.
B
H
G
DE
F
D2
50 and 100
Ton
D1
C
A
Document Number Document Revision Document Revision Date
L2009 C 11/2017
AJack Base D1 Jack Beam (Speed Pump) GAir Vent/Fill Plug
BPlunger D2 Jack Beam (Load Pump) HLoad Gauge
CRelease Valve EJack Handle IGauge Port
DJack Beam FRelease Valve Wrench
JH Premium
Steel Hydraulic Jacks
Instruction Sheet
A
I
C
F
E D
B
G
JH-1.5 - JH-20 JH-306 - JH-1006

2
SAFETY INFORMATION
To avoid personal injury or property damage during system operation, read and follow all
CAUTIONS, WARNINGS, and INSTRUCTIONS included with or attached to each product.
ENERPAC CANNOT BE HELD RESPONSIBLE FOR DAMAGE OR INJURY RESULTING FROM
UNSAFE USE OF PRODUCT, LACK OF MAINTENANCE, OR INCORRECT PRODUCT AND SYSTEM
APPLICATION. Contact Enerpac when in doubt as to applications and safety precautions.
WARNING
JH jacks are NOT equipped with a stop ring to
retain the plunger. To prevent plunger
over-extension, a port is provided to vent the
oil out of the cylinder as the plunger reaches the
maximum stroke. When the RED LINE around the
plunger becomes visible, the plunger is at
maximum extension. Further extension could result
in the plunger being forced out of the cylinder.
WARNING
To avoid personal injury, always wear proper personal protective gear when operating
hydraulic equipment, i.e. safety glasses, gloves, etc.
WARNING
Make sure that jacks are protected from external sources of damage, such as
explosive heat, flame, moving machine parts, sharp objects, and corrosive chemicals.
DO NOT expose equipment to temperatures above 150°F (65°C).
CAUTION
Use only Enerpac hydraulic fluid. DO NOT use brake or synthetic fire resistant fluids
because they will damage the jack seals.
WARNING
Provide a solid and level foundation
adequate to support the load being lifted.
WARNING
Position the jack to distribute the load over the
entire base of the jack. The jack plunger must be
centered in the line of force of the load as it is being
lifted.
WARNING
Stay clear of loads supported by hydraulics.
Jacks are lifting devices ONLY. After the load has
been raised, it should be blocked, using material
capable of supporting the load.
WARNING
DO NOT exceed rated stroke. If you need to lift a
load further, support the load, raise the level of the
jack with a sturdy support and then continue the
lift.
WARNING
DO NOT lift a load which exceeds the capacity of
the jack. The load rating is marked on the jack
nameplate.
WARNING
If the jack is subjected to abnormal or shock loads, it should be inspected immediately
by a qualified hydraulic technician.
Red Line

3
SPECIFICATIONS
INSTALLATION
OPERATION
Adding Fluid
Raising the Load
Removing Air
Model No. Capacity
Tons
Stroke
in (cm)
Eective Area
in2(cm2)
Collapsed Height
in (cm)
JH-1.5 1.5 5.19 (13.2) 0.69 (4.45) 7.50 (19.1)
JHL-1.5 1.5 18.00 (45.72) 0.69 (4.45) 21.72 (55.17)
JH-3 3 5.88 (14.9) 1.23 (7.94) 8.75 (22.2)
JHL-3 3 20.00 (50.80) 1.23 (7.94) 26.31 (66.83)
JH-5 5 6.25 (15.9) 1.87 (12.1) 9.50 (24.1)
JH-8 8 6.25 (15.9) 1.87 (12.1) 9.50 (24.1)
JH-12 12 5.13 (13.0) 3.28 (21.2) 8.88 (22.6)
JH-20 20 6.50 (16.5) 5.16 (33.3) 11.00 (27.94)
JH-306 30 6.13 (16.0) 5.94 (38.3) 10.00 (25.40)
JH-506 50 6.09 (15.5) 9.62 (62.1) 10.25 (26.04)
JH-1006 100 6.06 (15.4) 20.63 (133.1) 11.31 (28.73)
WARNING
Before adding fluid, make sure the plunger is fully retracted, or the system will
contain more fluid than the reservoir can hold.
1. Use wrench end of jack handle to open release valve by turning counter-clockwise.
2. Place jack on its side with fill plug facing up. Remove fill plug.
3. Slowly add Enerpac hydraulic fluid. Do not fill reservoir completely. Fluid level should be below fill
plug when jack is upright.
4. Stand jack upright, allowing excess fluid to run out of fill plug hole. Replace fill plug. Clean o excess fluid.
Check load rating on jack nameplate to make certain the jack is capable of lifing the load. Use a
gauge to monitor the load. Gauge adaptor kits are available for 20,30, 50 and 100 ton jacks. Use
gauge kit GF20L for JH-20 models, and gauge kit GF325 for JH-306, JH-506, and JH-1006 models.
1. On 30 - 100 ton models, open air vent.
2. Use wrench end of handle to close the release valve by turning clockwise hand tight.
CAUTION
Excessive tightening is unnecessary and will cause wear.
3. Insert handle into jack pump beam and pump until desired height is reached.
NOTE: For 50 to 100 Ton jacks, use speed (A) pump beam until plunger reaches
load. Then move the handle to load (B) pump beam to lift the load.
1. On 30 - 100 Ton models, open air vent.
2. Use wrench end of jack handle to open release valve by turning counter-clockwise.
3. Insert jack handle into jack pump beam and rapidly pump the handle.
4. Use wrench end of jack handle to close release valve by turning clockwise.
5. If jack operation is not smooth, repeat the air removal procedure.
A
B
Enerpac JH Series Jacks
These products conform with the
requirements for CE Marking.

4
4. Remove jack handle when not in use.
WARNING
Stay clear of loads supported by hydraulics. After the load has been raised, it
should be blocked, using material capable of supporting the load.
1. Use wrench end of jack handle to open the valve a very small amount to avoid sudden
dropping of the load. Turn release valve counter-clockwise very slowly to control the speed of
descent.
WARNING
NEVER turn release valve quickly to full open when there is a load on the jack. The
load will fall uncontrolled, leading to personal injury and/or property damage.
2. All jacks are load return. Without a load, the plunger may not retract. Adding weight to the
plunger will make it retract.
CAUTION
If you decide to stand on the jack, be sure the jack is stable and hold on to a sturdy
object to avoid injury.
1. Before storing, inspect and clean the jack.
2. Close the air vent on 30 - 100 Ton models.
3. Store jack upright to protect the seals.
4. Periodically lubricate the jack pump beam.
The following is intended as an aid in determining if a problem exists. DO NOT disassemble the
jack. For repair service, contact the Authorized Enerpac Service Center in your area.
Problem Possible Cause Solution
Jack will not rise,
rises part way, or
rises in spurts.
Load is too heavy. Do not attempt to lift more than rated capacity.
Release valve open. Close release valve.
Low fluid level. Add fluid. See page 3.
Air in system. Remove air as directed on page 3.
Plunger binding. Have jack serviced by a qualified hydraulic technician.
Jack rises, but loses
pressure.
Load is too heavy. Do not attempt to lift more than rated capacity.
Plunger seal leaking. Have jack serviced by a qualified hydraulic technician.
Plunger will not retract. No load on the plunger. Put weight on the plunger to help it retract.
Release valve closed. Open the release valve slowly. See "Lowering the Load".
Air vent closed.
(on 30 - 100 Ton models)
Open air vent valve.
Reservoir is over-filled. With jack in the upright position and no load, remove fill
plug and allow oil to drain out of fill hole.
Worn or damaged seals. Have jack serviced by a qualified hydraulic technician.
Plunger damage. Have jack serviced by a qualified hydraulic technician.
Lowering the Load
MAINTENANCE
TROUBLESHOOTING
CAUTION
In certain situations, the pump handle can kick back. Always keep body away from
the line of force of the handle.