Perkins 103-06 Workshop Manual page 23

Allowable limit
Standard diameter
71.7mm
71.9225-71.9375mm
(2.8228")
(2.8316-2.8322")
c. Oversized piston
When the cylinder is oversized, ensure
that oversized piston is used.
Piston Part
size number
Standard 115317560
115317564
0.5mm
oversize
115317567
1.0mm
oversize
103-10 Piston/Perama M30
Allowable limit
Standard clearance
0.25mm
0.0425-0.0665mm
(.0098")
(.0017-.0026")
Larger diameter
of piston skirt
71.9225-71.9375mm
(2.8316-2.8322")
72.4225-72.4375mm
(2.8513-2.8519")
72.9225-72.9375mm
(2.8710-2.8716")
PB041
PB042
Standard diameter Allowable limit
74.9425-74.9575mm 74 7mm (2.
(2.950-2.951 ") 9409 )
Piston Part
size number
Standard 115317382
0.5mm 115317386
oversize
1.0mm 115317389
oversize
103-06 Piston
Standard clearance Allowable limit
0.038-0.072mm 0 25mm (
(.0015-.0028") .010)
Allowable limit
Standard diameter
(Piston)
63.948-63.963mm 63 7mm (
(2.5176-2.5182") 2 5079")
Piston size Largerdiameter
of piston skirt
63.948-63.963mm
Standard
(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 Allowable limit
clearance
- 0 . 0 0 4 - + 0 . 0 0 4 m m 0.02mm
(.00015±.00015") ( 0 0 0 7 8 )
Largerdiameter
of piston skirt
74.9425-74.9575mm
(2.950-2.951 ")
75.4425-75.4575mm
(2.970-2.9706")
75.9425-75.9575mm
(2.9898-2.9904")