Kohler KDI Series Workshop Manual page 125

8.6.2 Valve seats check
Thoroughly clean the valves and their seats with.
B
Measure indentation of each valve with regard to the cylinder
head surface C, which is to be a MIN of 0.60 mm and MAX
of 0.85 mm.
B MAX indentation allowed on worn components is 1.10
The
mm.
If the measured value does not correspond with the values
indicated, replace the worn component.
Important
• The seats must be worked after driving to reach value B, go
to a rectification workshop for such operations.
8.6.3 Valve springs
Using a dynamometer, subject the spring to two different
forces (in Tab. 8.9) and check that the length of the spring
corresponds to the values indicated in the table.
The code ED0057551850-S is installed from S/N 4418801760
(*1)
Tab. 8.9
WEIGHT (kg)
ED0057552810-S ED0057551850-S
0
13.5
19.5
8.6.4 Valve guides check
Measure the diameters D
(Tab. 8.10).
The MAX allowed value of wear for
Observe values G from surface F when assembling guides
H (Tab. 8.10).
Important
• Carry out the measurements in different points to detect any
ovalisation and/or concentrated wear.
• Tab. 8.10 details the dimensional values of new components
only.
Valve stem - valve guide dimensions
Tab. 8.10
DIMENSIONS
REF.
(mm)
D 5.978 - 5.990
E 5.030 - 6.042
G 7.000 - 7.020
ED0053029590 _07
INFORMATION ABOUT OVERHAULING
LENGTH (mm)
*1
Z 48.34
0
20.4 Z1 30.00
29.8 Z2 22.00
and E of the rods and guides valve
D and E is 0.10 mm.
CLEARANCE VALUE (mm)
0.040 - 0.064
B
Fig. 8.21
Z
Fig. 8.22
D
Fig. 8.23
8
C
Z1
Z2
F G H
E
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