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12.5 Recycling
Due to the high metal share, hydraulic products can mostly be recycled. In
order to achieve an ideal metal recovery, disassembly into individual assemblies
is required. The metals contained in electric and electronic assemblies can
be recovered by means of special separation procedures as well.
13 Extension and modification
Explosion hazard caused by unauthorized modification!
Any unauthorized modification results in the loss of the explosion protection.
▶
Modifications exceeding the extent described in these operating instructions are
not permitted.
▶
Pilot control valves, sandwich plate valves and main valves may not be separated
from one another.
14 Troubleshooting and fault correction
14.1 How to proceed for troubleshooting
▶
Always work systematically and purposefully, even when under time pressure.
In the worst case, random, thoughtless disassembly and changing settings might
result in the inability to identify the original cause of error.
▶
First, get an overview of the functions of the valve in conjunction with the overall
system.
▶
Try to find out whether the valve has worked properly in conjunction with the
overall system before the error occurred.
▶
Try to determine any changes to the overall system in which the valve
is integrated:
– Were there any changes to the application conditions or area of application
of the valve?
– Have changes (e.g. refitting) or repair work been carried out at the overall
system (machine/system, electrical systems, control) or at the valve? If so: What
were they?
– Was the valve and/or the machine used as intended?
– How did the fault become apparent?
▶
Try to get a clear idea of the cause of error. Ask the direct (machine) operator.
Extension and modification
WARNING
RE 29115-XE-B/09.19, 4WRZ..7X/...XE..., Bosch Rexroth AG
43/48
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