Kohler KDI 1903M Workshop Manual page 102

8
8.5.1 Connecting rod dimensions check
Important
•
Before assembling the connecting rod and pistons
(Par. 9.3.7 e
weight between the complete connecting rod and
piston units do not exceed 8 gr to prevent weight
imbalances during rotation of the crankshaft and
consequent damage.
•
Mark some references on the connecting rods,
caps Q, pistons and gudgeon pins to prevent
unintentionally confusing the components during
assembly. Failure to do this may result in engine
malfunctions.
•
Connecting rod half-bearings S must be there with
each assembly.
Check that the contact surfaces are perfectly clean and
intact.
Assemble the connecting rod cap Q to the connecting rod
with the half-bearings S and tighten capscrews P
(tightening torque at 25 Nm).
With a dial gauge, measure diameters B and D.
The MAX allowed value of wear for B and D is 0.06 mm.
Tab 8.6
REF. DIMENSIONS (mm) CLEARANCE VALUE (mm)
A 169.980 - 170.020
B 30.020 - 30.030
C 29.995 - 30.000
D 54.035 - 54.066
E 67.700 - 68.000
F 29.750 - 29.790
Important
•
Tab. 8.6 details the dimensional values of new
components only.
•
Check that the connecting rod and crankshaft half-
bearings are coupled properly.
•
Refer to the warnings in
decreased.
•
If the clearance value between B and C is not
observed, you are required to replace bearing R
(Fig. 8.12).
EN 102
INFORMATION ABOUT OVERHAULING
9.3.8), check that the difference in
0.025 - 0.030
Par. 8.4.1 for value D
Fig. 8.11
Fig 8.12
Fig 8.13