MAHA MPJ Series, Original Operating Instructions

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BA550001-en
51
Malfunction Possible cause Remedy
Air motor does not run at
all
Air filter completely
clogged; dirt from the
pipe network
Cleaning
Air motor runs dry, stops;
no oil in the maintenance
unit
Top up oil
Air motor defective Replace
Air express control does
not work
Air filter clogged; dirt
from the pipe network
Cleaning
Pneumatic control line
blocked or kinked
Contact service
Raised load is lowered
Drain spindle not fully
closed; spring does not
close completely
Close drain spindle;
contact service
Leaking load valves Contact service
Piston rods extend slowly
at first when unloaded
and suddenly become
faster Oil level on the pit jack
too low due to transport
damage or natural
consumption
Top up oil
Piston rods "rattle";
inaccurate steering
Oil level on the pit jack
too low due to transport
damage or natural
consumption
Top up oil
Insufficient pit jack
Bleeding
Contact service
Oil loss at piston rod
breather If within limits, there is no
fault
Regularly extend to full
stroke so that no leakage
oil accumulates
Oil loss at valves
Too much oil from
maintenance unit
Set lower
Oil propagation through
water from compressed
air
Check maintenance unit
Oil leakage at spindle
guide
Seal wear Contact service
Oil leakage at sealing
plug
Leaking sealing plugs Contact service
Oil leakage at the air
motor Too much oil from
maintenance unit
Set lower
Oil leakage at the pump
block
Seal wear Contact service