MAHA MPJ Series, Original Operating Instructions

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6 The guide bush can be pulled off upwards after the threaded mandrel has
been removed.
7 To remove the piston, first remove the grub screw. The piston can then be
unscrewed. If this does not come loose, there are two M8 threads in the
piston crown for attaching a disassembly aid.
8 Fit a new set of seals to the cleaned guide bush and piston. To keep the O-
ring in position, we recommend applying multi-purpose grease to the groove
for the O-ring.