ahlmann AS 210 - Page 79

S220/S221/S230/S231/Z2009-2
9 Faults, Causes and Remedies
9 Faults, causes and remedies
NOTE
*) Faults may be eliminated only by authorised personnel
Fault
Engine
Engine does not start.
The bucket arm cannot be lifted/
lowered
Steering is sluggish
Swivel unit does not swivel
Support fails
The support fails when the bucket
arm is lowered in a swivelled state
Probable cause
Drive switch (4-9/5) is not in neutral
position
Pressure-relief valve in servo valve is
open
Pilot valve for working hydraulics
(4-9/6) is locked
Pilot pressure too low or does not
exist
Diesel engine failed
Pressure-relief valve in steering unit
is open
Slide in priority valve stuck
Swivel block blocks swivelling (1-4/
arrow)
Pressure-relief valve in servo valve is
open
Switching of stop valve in frame under
revolving seat stuck
Non-return valve in pressure line
stuck in open position
Remedy
See the operating instructions for the
engine
Set the drive switch to the neutral
position
Remove and clean pressure-relief
valve coupling, readjust*
Unlock pilot valve (4-8/2)
Open, clean and readjust pressure-
relief valve in control line *
Spring force can be used to bring the
bucket arm to its lowermost position
immediately after an engine failure.
Remove and clean entire pressure-
relief valve, readjust*
Replace priority valve *
Remove swivel block and store in
holder
Remove and clean entire pressure-
relief valve, readjust*
Bring bucket arm into travel direction;
unstick leverage
Bring bucket arm into travel
direction, remove and clean non-
return valve (replace if necessary) *
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