MAHA MPJ Series Original Operating Instructions page 51

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