Perkins 103-06 - Page 23

Standard diameter
Allowable limit
71.9225-71.9375mm
(2.8316-2.8322")
71.7mm
(2.8228")
c. Oversized piston
When the cylinder is oversized, ensure
that oversized piston is used.
Piston Part
Larger diameter
size number of piston skirt
Standard 115317560 71.9225-71.9375mm
(2.8316-2.8322")
0.5mm
115317564 72.4225-72.4375mm
oversize (2.8513-2.8519")
1.0mm
115317567 72.9225-72.9375mm
oversize (2.8710-2.8716")
PB041
PB042
103-10 Piston/Perama M30
Standard clearance
Allowable limit
0.0425-0.0665mm
(.0017-.0026")
0.25mm
(.0098")
Piston Part Largerdiameter
size number of piston skirt
Standard 115317382 74.9425-74.9575mm
(2.950-2.951 ")
0.5mm 115317386 75.4425-75.4575mm
oversize (2.970-2.9706")
1.0mm 115317389 75.9425-75.9575mm
oversize (2.9898-2.9904")
103-06 Piston
Standard diameter
(Piston)
63.948-63.963mm
(2.5176-2.5182")
Piston size Largerdiameter
of piston skirt
Standard
63.948-63.963mm
(2.5176-2.5182")
0.5mm 64.448-64.463mm
oversize (2.5373-2.5379")
1.0mm 64.948-64.963mm
oversize (2.5570-2.5576")
d. Clearance between gudgeon pin hole and
gudgeon pin.
Check the inside diameter of the gudgeon
pin hole and the outside diameter of the
gudgeon pin, and calculate the clearance
between them.
If the clearance is more than allowable
limit, replace.
Standard diameter Allowable limit
74.9425-74.9575mm
(2.950-2.951 ")
74 7mm (2.
9409 )
Standard clearance Allowable limit
0.038-0.072mm
(.0015-.0028")
0 25mm (
.010)
Allowable limit
63 7mm (
2 5079")
Standard
clearance
Allowable limit
-0.004-+0.004mm
(.00015±.00015")
0.02mm
(00078 )