CYLINDERS
AND
PISTONS
ENG
PISTON PIN INSPECTION
1.1nspect:
• Piston pin
Blue discoloration/grooves
~
Replace,
then inspect the lubrication system.
2.Measure:
• Piston pin-to-piston clearance
**********************************
• Measure the piston inside diameter
C£>.
• Calculate the piston pin-to-piston clear-
ance using
the
following
formula:
Piston
pin-to-piston
clearance =
Bore size (piston pins)
(6)
-
Outside
diameter
(piston pins) ®
Outside
diameter
(piston pin):
19.995 20.000
mm
(0.1872 0.7874 in)
.If
out
of
specification, replace the piston.
Clearance (piston
pin
to
piston):
0.004
,..,
0.020
mm
(0.00016
....
0.0008 in)
Measurement
steps:
• Measure the piston pin outside
diameter
®.
If
out
of
specification, replace the piston
pin.
**********************************
4 -
32
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