Perkins 103-06 Workshop Manual page 27

Assemble the connecting rod and connecting
rod cap, and tighten to the specified torque (3.0-
3.5kgf.m) (21.7-25.31bf.ft) - 103-09/10/Perama
M25/M30, (2.1-2.6kgf.m) (15.2-18.81bf.ft) - 103-
06
NOTE: Never rotate the connecting rod.
Remove the connecting rod cap. Measure the
oil clearance with the scale printed on the gauge
bag.
NOTE: Measure the widest area.
103-09/10/Perama M25/M30
Standard clearance Allowable limit
0.035-0.083mm 0.2mm (.
(.001-.003") 0078)
103-06
Standard clearance Allowable limit
0.031-0.079m m ( 0.2mm (.
.0012-.0031 ") 0078)
If the oil clearance exceeds the allowable limit,
replace the bearing. Or, grind the crankshaft
and use oversize bearing.
NOTE: When grinding the outside diameter of
the crankshaft, ensure that the oil clearance is
correct before reassembly.
103-09/10/Perama M25/M30
Bearing Partnumber
size
Standard 198517130
0.25mm 198517134
U.S.
(.0098")
0.50mm 198517137
U. S.
(.0196")
- Reassembly
PB047
Crankshaft pin
O.D. dimension (mm)
38.964-38.975mm
(1.5340-1.5344")
38.714-38.725mm
(1.5241-1.5246")
38.464-38.475mm
(1.5143-1.5147")
103-06
Bearing Crankshaftpin
size O.D. dimension (mm)
S.TD. 34.964-34.975mm
(1.3765-1.3770")
0.25mm 34.714-34.725mm
U. S. (1.3667-1.3671")
(.010")
0.50mm 34.464-34.475mm
U. S. (1.3568-1.3573")
(.020")
A. Reassemble the piston on the connecting rod as
follows.
B. With a piston heater or the like, heat the piston to
approximately 100°C.
piston to the connecting rod by aligning the set
marks.
C. Set the 'SHIBAURA' marks or 'F' mark as
shown in the illustration PB048. Align the set
marks (figures) at (A) on the connecting rod.
Arrow mark or 'F'
Shibaura mark
D. Replace the piston ring on the piston. Position
scribe mark uppermost.
E. When the connecting rod or piston/gudgeon pin
has been replaced, difference in weight of the
assembly (connecting rod plus piston rings)
should not exceed 10 grams between cylinders.
Part No.
198517310
198517314
198517317
Then, assemble the
(103-06)
(103-09/10)
PB048