Nitrogen Gas In The Backhead - DEHACO IBEX Series Operation And Maintenance Manual

6.4 Nitrogen gas in the backhead

Dehaco or an approved Dehaco dealer will ensure that
the hydraulic breaker will be ready to use at delivery.
The backhead therefore will be charged with nitrogen.
For inspection or maintenance purposes it is required
to monitor and refill the nitrogen.
The breaker will be supplied with a gas charging kit
as standard. This includes a charging block, extension,
25 bar pressure gauge (IBEX 70GS – IBEX 4000GS) and
100 bar pressure gauge (IBEX 1200GS – IBEX 4000GS).
By following the steps below it is possible to safely
and accurately inspect and fill the backhead with
nitrogen.
Procedure for filling backhead
1) Unscrew the gas plug on the backhead using a 5
mm Allen key.
2) Attach the charging kit to the charging valve on
the backhead (it is possible that an extension is
required to mount the kit).
3) Ensure that the pusher is in the up position.
4) Close the screw valve.
5) Attach the gas cylinder.
6) Charge the backhead to the pressure indicated in
column A. This is 4 bar higher than the required
pressure.
7) Open the cylinder and wait for the pressure to
equalise between the regulator and the backhead,
once equalised close the cylinder.
8) Open the screw valve whilst the pusher is in the
up position to release the pressure within the
charging kit and hose, then remove the hose from
the charging kit.
9) Screw the stop back onto the charging kit.
10) Press the pusher in to measure the nitrogen in the
backhead.
11) Whilst holding the pusher in the down position
adjust the pressure to the value indicated in
column B using the screw valve.
12) Release the pusher and the backhead should be
charged to the desired pressure.
13) If the pressure is lower than desired then repeat
procedure from step 6.
14) Open the screw valve whilst the pusher is in the
up position to release the pressure within the
gauge and dismount the charging kit.
15) Tighten the gas plug.
© 2018 Dehaco B.V. • Operation and maintenance manual IBEX Hydraulic breakers G-type – Version 17-08-2018
6.4.2 Technical data nitrogen gas backhead
Model A
16 bar (232 psi)
IBEX 130
12 bar (174 psi)
IBEX 135
20 bar (290 psi)
IBEX 170
12 bar (174 psi)
IBEX 200
20 bar (290 psi)
IBEX 320
20 bar (290 psi)
IBEX 400
20 bar (290 psi)
IBEX 600
20 bar (290 psi)
IBEX 900
10 bar (145 psi)
IBEX 1200
10 bar (145 psi)
IBEX 1800
10 bar (145 psi)
IBEX 2200
13 bar (188 psi)
IBEX 2800
20 bar (290 psi)
IBEX 3200
20 bar (290 psi)
IBEX 4000
GAS CHARGING ASSEMBLY:
SWITCH
SCREW
GAUGE
CHARGING BLOCK
PLUG
CHARGING VALVE
6. Maintenance
B
12 bar (174 psi)
8 bar (116 psi)
16 bar (232 psi)
8 bar (116 psi)
16 bar (232 psi)
16 bar (232 psi)
16 bar (232 psi)
16 bar (232 psi)
6 bar (87 psi)
6 bar (87 psi)
6 bar (87 psi)
9 bar (130 psi)
16 bar (232 psi)
16 bar (232 psi)
INSTRUCTIONS FILLING BACKHEAD:
PULL
OPEN
HANDLE
BACK HEAD
CLOSE
BACK HEAD
PUSH
CLOSE
BACK HEAD
REMOVE PULL
CHARGING KIT:
CLOSE
BACK HEAD
CLOSE
CLOSE
OPEN-CLOSE
OPEN
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