Kohler KDI 1903 TCR

177
EN
described in
Tab.8.6
.
If the measured values do not follow those described in
Tab.8.6
,
replace connecting rod
T
.
8.5.2 Checking the gudgeon pin-pin axes are parallel
Lubricate gudgeon pin
A
and bearing
R (Fig. 8.12)
.
Insert the gudgeon pin into bearing
R
. Use a dial gauge to check
the axis parallelism of the connecting rod big end and small end.
Parallel deviation (value V ) measured at the tip of the
gudgeonpin, must be a MIN of 0,015 and MAX of 0,030 mm.
If the parallelism values do not comply with the specified
ones,replace the connecting rod with a new one.
8.5.3 Piston rings check
Insert ring
U
into the cylinder, measure value H (distance between
the points of ring
U
). Repeat for all the seal rings.
If the measured value H does not correspond to the values
indicated in the table (Tab. 8.7) , replace the seal rings U .
Important

Seal rings cannot be replaced separately.
NOTE:
refer to
Fig. 8.19
to locate the rings.
Tab. 8.7
RINGS
H (mm)
U1
0.100 - 0.300
U2
0.250 - 0.500
U3
0.250 - 0.400
Fig 8.14
Fig 8.15
8.5.4 Piston dimension check
Clean the piston thoroughly.
Measure the diameter of the piston at 12 mm (quota
L
) from the
base of the skirt in correspondence with the graphite lubrication
windows
M
.
Refer to
Tab. 8.1b
to establish the clearance value of the pistons
with a decreased diameter.
In correspondence with point
W
, there are: 3 digits for the STD
piston;
3 digits followed by R for a piston with an increased diameter of
0.20 mm; +0.5 for a piston with an increased diameter of 0.50
Fig 8.16