13
Disassembly of the piston
➡
Place the piston on the piston crown 30 and unscrew the
Allan head screws 72 on the bottom plate of the piston 31;
be careful of the lock washers 84.
➡
Disassemble the piston cap 31 an piston skirt 32.
Assembly
➡
Clean all parts; examine valve plates 10/11 and spiral-type
expanders 48 for damages.
➡
Install new piston seals 46 between the piston head 30 and
the piston skirt 32 and between the piston skirt and the
piston cap 31.
➡
Exchange both O-rings 106 and examine and exchange if
necessary piston guiding rings 34.
➡
Working diagonally, tighten the Allan head screws 72 up to
the marking (torque of 1.3 Nm) by means of a torque
wrench and screw the piston head and the piston cap
together.
Exploded view of piston with connecting
15 Connecting rod
30 Piston head
31 Piston cap
32 Piston skirt
33 Supporting ring
34 Piston guiding ring
46 Piston seals
72 Allan head screws
84 Lock washers
106 O-Ring
72
84
31
106
46
33
34
32
34
33
46
106
15
30
➡
Assemble both pistons, connecting rods 15 and spacers 27
onto connecting rod journal 26, observe the original positi-
on and the correct sequence.
➡
Slide the centrifugal mass 25 onto the connecting rod jour-
nal and tighten it finger tight with the lock washer and the
hexagon nut 90.
marking =
max. 1,3 Nm !
special torque wrench
