Kohler KDI 2504TM Workshop Manual page 107

INFORMATION ABOUT OVERHAULING
•
Seal rings cannot be replaced separately.
NOTE: refer to Fig. 8.19 to locate the rings.
Tab. 8.7
RINGS
U1
U2
U3
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
0.10 mm;
+0.5 for a piston with an increased diameter of 0.50 mm;
+1 for a piston with an increased diameter of 1.00 mm;
If clearance between cylinder and piston is greater than 0,074
mm, the piston and seal rings must be replaced.
Important
•
Tab. 8.1b details the dimensional values of new
components only.
Tab. 8.1b
Ø CYLINDERS
PISTON
(± 0.007 mm)
STD 88.010
+0.10 88.110
+0.50 88.510
+1.00 89.010
H (mm)
0.100 - 0.300
0.250 - 0.500
0.250 - 0.400
CLEARANCE
Ø PISTON
VALUE
(± 0.007 mm)
(mm)
87.950
88.050
0.046 + 0.074
88.450
88.950
Fig 8.16
Fig 8.17
8
107
EN