37GS 461
– Examine the piston rings, replace
if necessary, b 5.8
– Install the cylinder, b 5.5
– Reassemble remaining parts in
reverse order
5.8 Piston rings
– Remove piston, b 5.7
– Remove piston rings from piston
: Use a piece of old piston ring to
scrape the grooves clean
(arrows)
3443RA138 TG3443RA139 TG
: Align the new piston rings so that
the radii at the ends of the ring
(arrows) face upwards
– Carefully slide the piston rings
over the piston
– danger of breakage
: Position the piston rings so that
the radiuses at the ring gaps
encircle the fixing pins in the
piston grooves
Check the correct installed position
of the piston rings again
– Install the piston, b 5.7
– Reassemble remaining parts in
reverse order
3443RA140 TG
5.9 Decompression valve
– Remove shroud, b 5.4
: Unscrew decompression
valve (1)
: Examine the sealing cone
(arrow) on the decompression
valve for signs of damage
– Use a new decompression valve
if the sealing cone on the
decompression valve does not
seal tightly or is damaged.
– Fit the decompression valve by
hand and screw it in
– Screw the decompression valve
tight
– Reassemble remaining parts in
reverse order
1
2411RA052 TG
5902RA164 TG
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