Connecting Rod - Piston Assembly - Kohler KDI 1903M Workshop Manual

INFORMATION ABOUT OVERHAULING
Important
•
The crankshaft and connecting rod must be
replaced every time they are assembled to prevent
seizure, as they are made of special lead-free
material.
•
The MAX allowed value of wear for A1 and A2 is
0.120 mm.
•
The MAX allowed value of wear for B1 and B2 is
0.120 mm.
•
To grind the crankshaft, a decrease in diameter of
the halfbearings and connecting rod is provided for
at 0.25 mm and 0.50 mm, to grind gudgeon pins
A1 and B1, measure the values of diameters A2
and B2 by assembling the decreased half-
bearings, define the diameter to grind of pins A1
and B1,
observing the clearance indicated in Tab. 8.5.
•
La Tab. 8.5 riporta i valori dimensionali solo per i
componenti nuovi.
8.4.2 Checking the axial clearance of the crankshaft
Perform the operations described in
Using a dial gauge, measure the axial shift of crankshaft E.
Axial shift must be a MIN of 0.18 mm and MAX 0.38 mm..
If the values measured do not correspond, replace shoulder
rings D.

8.5 Connecting rod - piston assembly

Important
• In case of replacement, the connecting rods and
pistons must always be replaced for all
cylinders.
Par. 9.3.5 and 9.3.6.
Tab 8.5 Connecting rod and journal
diameter
DIMENSIONS
CLEARANCE
REF.
(mm)
53.981 -
A
54.000
54.035 -
A1
54.066
63.981 -
B
64.000
64.035 -
B1
64.083
Fig 8.10
8
VALUE (mm)
0.035 - 0.085
0.035 - 0.102
101
EN