J. D. NEUHAUS JDN mini Series, Operation And Assembly Instructions

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FAU LT TA B L E
powered by air !
FAU LT S , C AU S E A N D R E M E DY
Page 42
FAU LT S , C AU S E A N D R E M E DY
Fault Possible cause Remedy
Lifting not possible Air pressure too low Increase air pressure to the relevant value
EMERGENCY STOP switch When danger is eliminated,
is pressed release the EMERGENCY STOP switch
Hand control is faulty Have hand control repaired
Only very slow lifting Brake does not release fully Set air pressure to the relevant value,
is possible Check seal of brake piston and
change seal if necessary
Check the adjustment of the brake piston
(see
Spare Part List )
Brake lining worn Replace brake lining
or uneven
Motor cover bolts loose Tighten bolts
Air supply hoses are Check connections of air supply hose and
leaking or loose control hoses and connect properly
Cross section of air line Use air line with sufficiently large
too small diameter (check air pressure)
Dirt in the service unit* Clean the service unit,
Filter blocked ensure better air quality
Silencer is Replace the silencer elements
clogged or clean, improve air quality if necessary
Motor vanes worn Replace motor vanes
Motor has run dry Lubricate motor,
Check oiler*
Control valve on motor Have the control valve repaired
Excessive running on during braking
Brake disc and/or Replace brake disc and/or
brake piston worn brake piston
Loud chain noise Chain dry Lubricate chain
at chain sprocket Chain worn Replace JDN chain with new JDN chain
Chain sprocket worn Replace chain sprocket, check chain guide,
replace if necessary
Wrong chain drawn in Identify chain and replace with
JDN chain if necessary
Lifting or lowering speed Adjustment of Correct adjustment of brake piston. At high
reduced at higher lifting heights brake piston too tight ambient temperatures perform adjustment
or motor comes to a standstill with the device warmed up accordingly
*if installed