ROYAL ENFIELD UCE ENGINE SERVICE MANUAL
135
S.
No.
Fastener, Size, Tool Usage, Precautions, Photos
Aggregate to Assemble /
Instructions
Locate the oil ring
expander into the oil ring
groove.
Slide the bottom rail to
the bottom of the
expander.
Slide top rail to the top of
the expander.
Place the second ring in
piston (Index mark “2 IP”
facing upwards).
NOTE :
Second ring has a taper edge
cross section and is hard
chrome plated.
IN
EX
Locate the top ring
(Index mark “1 IP” facing
upwards).
Stagger piston rings end
gap as shown in Fig.
NOTE :
Top ring has rectangular
cross section with black
colour (Nitride coating).
NOTE :
After installation, the ring
should rotate freely
rotatable in the ring grooves.
CAUTION :
Ensure the open end of any
piston ring does not align
with the piston pin boss.
EX
IN
Locate the piston on the
connecting rod and
insert the piston pin into
the piston.
Fit the circlips on either
side and ensure they are
located properly in the
grooves.
NOTE :
Carefully fix the piston pin
clip into the piston boss
while covering Crank case
neck by shop towel /
chamois cloth as shown in
Fig.
12.27
Piston Ring Sub
Assembly
