PennEngineering • www.pemnet.com 45
Instruction Manual - RIV938
CAUSE
Air leaks from mufer (T).
Motor screwing
Quick kit assembly
Loss of revolutions during
unscrewing
SOLUTION
Check the two O-rings (O4) and o-ring
(21 part number 3235600) which could
be worn or broken.
When the rotating pin (6 part number 4151500) is broken and you
replace it, the motor may rotate continuously, which means that the
shaft (13 part number 3761300)
is too long; in this case it will have
to be shortened by a few tenths to
obtain the closure of the ball (14
part number 3096900).
Unlike the situation above, the shaft is too short and it has to be
replaced with a new one, tting it without end oat, with the air on,
in order to obtain the closure of the ball (14 part number 3096900).
When assembling the quick kit (code
4176900), with air off, make sure to create
an axial space of 1.5mm allowing the pin to
move freely.
When you are working intensely there is likely to be a loss of
revolutions in the unscrewing; it is necessary to remove the air hose
and add a few drops of oil in the air hose connection (Ref. 34) and
re-enter the air by turning the
engine with button (P) for a
couple of minutes.
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