FOR YOUR SAFETY
Read all instructions, warnings and cautions carefully. Follow all safety precautions to avoid personal injury
or property damage during system operation. Jackco cannot be responsible for damage or injury resulting
from unsafe product use, lack of maintenance or incorrect product and/or system operation. Contact Jackco
when in doubt as to the safety precautions and operations.
Failure to comply with the following cautions and warnings could cause equipment damage and personal
injury.
• Stay clear of loads supported by hydraulics.
A cylinder, when used as a load lifting device,
should never be used as a load holding device.
After the load had been raised or lowered,
it must always be blocked mechanically.
• Do not exceed equipment rating never attempt
to lift a load weighing more than the capacity
of the cylinder. Overloading causes equipment
failure and possible personal injury. The
cylinders are designed for a maximum pressure
of 10,000 psi. Do not connect a jack or cylinder
to a pump with a higher pressure rating.
• The system operating pressure must not
exceed the pressure rating of the lowest
rated component in the system. Install
pressure gauges in the system to monitor
o p e r a t i n g p r e s s u r e . I t i s y o u r w i n d o w
to what is happening in the system.
• Only use hydraulic cylinders in a coupled
system. Never use a cylinder with
unconnected couplers. If the cylinder becomes
extremely overloaded, components can fail
catastrophically causing severe personal injury.
• BE SURE SETUP IS STABLE BEFORE
LIFTING LOAD.
Cylinders should be placed on a flat
surface that can support the load. Where
applicable, use a cylinder base for added
stability. Do not weld or otherwise modify the
cylinder to attach a base or other support.
• Avoid situations where loads are not directly
centered on the cylinder plunger. Off-center
loads produce considerable strain on cylinders
and plungers. In addition, the load may slip
or fall, causing potentially dangerous results.
• Immediately replace worn or damaged parts
genuine JACKCO parts. Standard grade parts
will break causing personal injury and property
damage. JACKCO parts are designed to fit
properly and withstand high loads.
• To avoid personal injury keep hands and feet away
from cylinder and work piece during operation.
• NEVER set the relief valve to a higher pressure
than the maximum rated pressure of the pump.
Higher settings may result in equipment damage
and/or personal injury. Do no remove relief valve.
• Do not handle pressurized hoses. Escaping oil
under pressure can penetrate the skin, causing
serious injury. If oil is injected under the skin, see a
doctor immediately.
• Avoid damaging hydraulic hose. Avoid sharp bends
and kinks when routing hydraulic hoses. Using a
bent or kinked hose will cause severe backpressure.
Sharp bends and kinks will internally damage the
house leading to premature hose failure.
• Do not drop heavy objects on hose.
A sharp impact may cause internal damage to hose
wire strands. Applying pressure to a damaged hose
may cause it to rupture.
• Do not lift hydraulic equipment by the hoses or
swivel couplers. Use the carrying handle or other
means of safe transport.
• Keep hydraulic equipment away from flames and
heat. Excessive heat will soften packing and seals,
resulting in fluid leaks. Heat also weakens hose
materials and packings. For optimum performance
do not expose equipment to temperatures of 150°F
or higher. Protect hoses and cylinders from weld
spatter.
• Hydraulic equipment must only be serviced by a
qualified hydraulic technician. For repair service,
contact JACKCO Inc. To protect your warranty, use
