Cleaning, maintenance and repairs
12.6.5
Repairs to the pressure tank (workshop)
Functional description of the pressure tank
For re-compaction of the soil the tapered ring tyres are subjected to
the weight of the machine.
Part of the machine's weight is transmitted via the folding cylinders to
the tapered ring tyres. As the hydraulic fluid is almost non-
compressible, the pressure does not remain constant even when the
folding cylinders are shut off, i.e. when the oil is cooling down. The
folding cylinders retract by several millimetres. In order to compensate
for the volume loss, during the folding out procedure oil is stored at a
pressure of approx. 100 bar in a pressure tank filled with nitrogen (Fig.
221/1).
In the event of a repair observe the following:
The hydraulic system and the pressure tank
connected to it (Fig. 221/1) are under a con-
stant high pressure (approx. 100 bar).
Release of the hydraulic hose lines or the un-
screwing or opening of the pressure tank in the
event of a repair may be performed only in a
specialist workshop with suitable auxiliary
means.
For all work on the pressure tank and the hy-
draulic system connected to it observe the
standard EN 982 (safety requirements for fluid
systems).
Fig. 221
DANGER
The hydraulic system and the pressure tank connected to it are
under a constant high pressure (approx. 100 bar).
202
Cirrus BAH0049-1 09.14
