Release the pressure from the piston
accumulator
♦
Release gas from the piston accumulator to
depressurise the piston accumulator or if the value
measured is above the required gas pressure.
NOTICE Damage to the filling valve
Nails, screwdrivers or similar objects can damage
the filling valve.
► Never use nails, a screwdriver or similar objects
to release nitrogen gas from the piston
accumulator.
♦
Push the hose end of the test pressure gauge into
the filling valve again.
This will cause gas to escape from the piston
accumulator.
♦
Repeat this until the required gas pressure has
been reached or until the piston accumulator is
depressurized.
♦
Install the threaded plug (A) in the filling valve (G).
Filling/topping up the piston accumulator
WARNING Unexpected movement
If the working tool has got stuck, it might come loose
unexpectedly if the pressure in the piston
accumulator is increased. The unexpected impact
may lead to serious injury.
► When filling the piston accumulator make sure
that there is nobody within the direct vicinity of the
working tool.
If a country-specific adapter (E) is required, it has to
be installed between the nitrogen bottle and the
pressure relief valve (D).
♦
Connect the pressure relief valve (D) to the
nitrogen bottle.
♦
Close the pressure relief valve (D).
♦
Connect the filling hose end (H) to the minimess
connection (C) of the pressure relief valve (D).
♦
Open the valve of the nitrogen bottle (F).
♦
Remove the threaded plug (A) from the filling
valve (G).
♦
Push the free filling hose end (H) into the filling
valve (G).
♦
Slowly open the pressure relief valve (D) to let the
nitrogen flow into the piston accumulator.
♦
Read out the pressure increase from the pressure
gauge (B).
♦
Close the pressure relief valve (D) when the piston
accumulator has reached the required pressure
+10 %.
♦
Pull the filling hose out of the filling valve (G).
♦
Check the pressure in the piston accumulator and
let gas escape until the required gas pressure has
been reached.
♦
Install the threaded plug (A) in the filling valve (G)
and tighten it to the required tightening torque (see
chapter Bolt connections / Tightening torques).
♦
Close the nitrogen bottle valve (F).
49© 2012 Atlas Copco Construction Tools GmbH | No. 3390 5096 01 | 2012-04-26
Original instructions
MAINTENANCEHB 3100, 3100 DP, 3600, 3600 DP, 4100, 4100 DP,
4700, 4700 DP
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