REHOBOT CH62 Mode D'emploi page 10

GB
Thank you for the faith you have shown in us by choosing a
REHOBOT product. REHOBOT stands for products of high quality
and it is our hope that you will be able to use this product for
many years.
To avoid functional disturbances, we recommend that you read
these instructions thoroughly before using the product.
Receiving instructions
Visually inspect all components for shipping damage. Shipping
damage is not covered by warranty. If shipping damage is found,
notify carrier at once. The carrier is responsible for all repair and
replacement costs resulting from damage in shipment.
Read the warnings and instructions to prevent personal injury
or damage to property. Take all appropriate safety precautions
and wear suitable safety equipment, such as gloves, safety
glasses, etc.
REHOBOT AB accepts no liability for injury or the consequences
of using REHOBOT products without taking suitable safety pre-
cautions, using a product or system for the wrong application,
or through inadequate maintenance. If in any doubt contact
REHOBOT or an authorised REHOBOT dealer.
Technical description
REHOBOT hollow cylinders are available in four different ver-
sions:
CH - Single-acting
CHF - Single- acting with spring return
CHFA - Single- acting with spring return, aluminum
CHD - Double-acting
Information regarding the model type, capacity, maximum work-
ing pressure and serial number is engraved on the cylinder tube,
see Fig. 1.
System construction
Always plan a hydraulic system by choosing products that
are suitable for the task in hand. Check product limitations
regarding pressure range, lifting capacity and compatibility. The
maximum working pressure of the system must not exceed the
maximum working pressure of any product in the system.
We recommend the use of pressure gauges with any hydraulic
system to ensure that it is operated within its safe working
range.
Make sure that all hydraulic hoses, connections, etc., are con-
nected to the right connection port (pressure or return port) on
the pump, ram, valve or other hydraulic component.
Applications
Because of its design the hollow cylinder can be used for both
pushing and pulling operations.
Pushing operations
Pushing/Lifting
When a hollow cylinder is used as a conventional ram we
recommend the use of a solid pressure head (THR). (See under
heading Accessories.)
Position the cylinder on or against a solid flat surface before
lifting. Never lean over a pressurised cylinder or pump lever.
Secure the load before lifting to make sure that it cannot roll
or slip.
Never work underneath a raised load without first
•
securing it with blocks or some other mechanical
support.
Never disconnect a cylinder from the pump when
•
the hydraulic system is under pressure.
Pushing onto shafts (Fig. 2)
When the cylinder is used for applications such as pushing a
bearing (A) onto a shaft (B) it is important that the stop or nut
(C) has as large a surface area as possible so that the force is
spread over the entire base of the cylinder.
Never stand behind a cylinder when carrying out
•
this type of work. If the stop or shaft breaks this
could result in injury.
Never disconnect a cylinder from the pump when
•
the hydraulic system is under pressure.
Pulling operations
Pulling operations usually exploit the fact that the cylinder is
hollow.
Fitting (Fig. 3)
A rod (B) is inserted through the object to be pulled (A) and
through the cylinder itself. Stops (C) are fitted to both ends of
the rod (B). A pressure head with threaded hole can be used as
a stop at the piston end.
Removal (Fig. 4)
A rod (B) is inserted through the object to be pulled (A), through
the spacer (D) and through the cylinder itself. Stops (C) are fitted
to both ends of the rod (B). A pressure head with threaded hole
can be used as a stop at the piston end.
Never stand in front of or behind a cylinder when
•
carrying out this type of work. If the stop or shaft
breaks this could result in injury.
Never disconnect a cylinder from the pump when
•
the hydraulic system is under pressure.
Uneven loading (Fig. 5)
Make sure the ram supports the load at right angles to the
surface. Avoid uneven loading, i.e. situations where the load
is not carried through the centre of the lifting plate. Uneven
loading puts unäfavourable stresses on the ram and can lead to
permanent damage. Avoid point loads - spread the load across
the lifting plate whenever possible.
Overloading