11.27
Assembling pistons
•
Install piston rings, using piston-ring pliers.
1st groove: rectangular-section ring
2nd groove: micro-chamfer ring (note pin
for ring gap and TOP marking).
3rd groove: equal-chamfer ring with tubular
spring, (note TOP marking).
L
Note:
The tubular spring gap must be offset by 180° from
the equal-chamfer ring gap.
Checking cylinder dimensions
•
Set the internal micrometer to the nominal cylin-
der bore diameter.
•
Measure the cylinder bore at three heights and in
a crosswise pattern: in the direction of forward
travel and at a right angle to it.
Removing and installing small-end bushing
•
Press out the small-end bushing.
•
The gap in the new bushing, when pressed in,
must be at an angle of 60° either to the left or the
right of the centre axis.
•
Ream out the small-end bushing.
•
Drill the oil hole and deburr it.
e
Caution:
It should be possible to push the piston pin through
the small-end bushing with only light pressure.
•
Check that conrod bores are parallel.
•
The difference over the measured length “P”
must not exceed 0.06 mm (0.0024 in).
Measured length “P”................... 150 mm (5.906 in)
1
2
3
LT110370
LT110380
30°
60°
60
°
LT110390
LT110400
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