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Thank you for the confidence you have shown in us by choosing
a REHOBOT product. REHOBOT stands for high quality products
and we hope that this product will serve you well for many years.
To avoid problems in operation we recommend that you read
these instructions before you use the product.
Technical description (Fig. 1)
Hydraulic double-acting cylinder
Max. working pressure:
Max. compressive force:
Max. pulling force:
Stroke:
DHC12E-285
DHC12E-330
DHC12E-570
Min. length:
DHC12E-285
DHC12E-330
DHC12E-570
Max. length:
DHC12E-285
DHC12E-330
DHC12E-570
Weight:
DHC12E-285
11,1 kg
DHC12E-330
11,7 kg
DHC12E-570
15,0 kg
Classification according to EN13204:
DHC12E-285
R120/285-11
DHC12E-330
R120/330-12
DHC12E-570
R120/570-15
All models are fitted with V-notch pressure heads at both ends.
The cylinders can be fitted with other pressure heads, extension
tubes, chain attachments, etc.
Using the tool
The tool is operated by means of a rotary grip. For pressing ope-
rations the grip is turned anti-clockwise. For pulling operations the
grip is turned clockwise.
To allow connection to a pressure pump the tool is equipped
with two 0.4 m (15.7 in) long hoses with male and female quick
couplings fitted with dust caps (Fig. 2). The female coupling has
a locking ring. NOTE, other types of couplings may be fitted. The
end of the tool pressure hose is labelled "PRESSURE".
Safety features
A dead man's handle on the control grip ensures that the tool
stops operating as soon as the grip is released.
A built-in safety valve protects the tool if the return hose is not
connected properly. If the safety valve has tripped or the return
valve is not connected properly a small amount of oil will leak out
of the front edge of the control valve.
A hold function allows the tool to maintain the existing load even
when the hoses are disconnected. Turning the control grip will not
affect the hold function when the tool hoses are disconnected.
80 MPa
(800 bar, 11600 psi)
120 kN
(12.2 tonnes, 13.5 sh tn)
30 kN
(3 tonnes, 3.4 sh tn)
285 mm
(11,2 in)
2 x 165 mm
(2 x 6,5 in)
2 x 285 mm
(2 x 11,2 in)
521 mm
(20.5 in)
598 mm
(23.5 in)
838 mm
(33.0 in)
806 mm
(31.7 in)
928 mm
(36,5 in)
1408 mm
(55,4 in)
(24,5 lbs)
(25,8 lbs)
(33,1 lbs)
Connection/Disconnection (Fig. 3)
To connect the tool to a pump, connect the tool pressure hose to
the pump pressure hose. Both hose ends are labelled with the
word "PRESSURE". The tool can be connected directly to the
pump or via a separate hose reel. Similarly, the tool return hose
is connected to the pump return hose, directly or via a separate
hose reel.
The male and female couplings can only be connected when
the hoses are depressurised and the locking ring on the female
coupling is positioned as in Fig 3a.
After connection, the locking ring on the female coupling must be
positioned as in Fig 3C to prevent accidental disconnection.
The male and female dust caps should now be joined together as
shown in (Fig. 3C). This prevents the dust caps from becoming
contaminated.
To disconnect the tool, simply reverse the sequence. NOTE, the
hoses must be depressurised before being disconnected. After
disconnection, fit the respective dust caps to the couplings to
prevent contamination of the couplings.
Practical spreading work
Bending – spreading
Make sure that both pressure heads are correctly positioned and
have a secure grip on the object. If the pressure heads lose their
grip or begin to slip – stop work. Reposition the tool and try again.
Always try to position the cylinder at right angles to the load. If the
tool begins to slide – stop work. Reposition the tool and try again.
Once the tool has started to slip the situation will not improve, it
will always get worse.
One common reason for the cylinder to slip is that the load is sliding
sideways. Always secure the load before continuing work.
Never work underneath a raised load without first securing it
on blocks or providing some other physical support.
Lifting
Position the tool at a suitable lifting point. Lift a short distance,
insert blocks, lift again, etc. For more information, see the heading
Bending – Spreading.
Pulling
Fully extend the tool. Remove the V-notch pressure heads and
fit the chain attachment RT10 (Figs. 4 & 5). Secure one chain
around the object to be pulled, and secure the other chain around
a suitable fixed object. Then pull the chains tight and attach them
to the hooks on the chain attachments.
During pulling it is important that the chains form a straight line
between the fixed object and the attachment point, so that the
pistons are not subjected to bending (Fig. 6).
Once work is complete
To release the tool – retract the pistons to the rest position and
then pump them out about 20 mm (1 in).
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