Dnepr MT10 - Page 52

[::g
Number and des-
cription of campo-
nent part (shaft)
MT801238
piston pin
(outsi-
de di
amete r)
6101217
compression pis-
tor. r ing- (ring
width)
72012 1 8-A
oil piston ring
(ring ,,·idth)
Nominal size nnd
tolerance, mm
Green
20.9925 -2 0.9900
77.98
77.98- 77.97
21
-0 .01
White
"1 1. 0000-20.9975
Black
20.9975-20.9950
Red
20.9950 -2 0.9925
Green
20.9925-20.9900
2.5 -0 .0 10
-0.022
5-0.013
Tolerance zone, mm
Number and des-
Nominal size a nd
clearance interf erence
cripti
on oi mating
tolerance, mm
member
(opening)
mini -[ rn" x i-
mini ·[ ma xi-
mum mum mum mum
Green
0.0045 10. 009!)
20.9855- 20.9830
78.04- 78.03
0.05
0.07
MT80 1
2-2
21 +0.007
connecti n ~
rod,
ass'y (opening of
-0.003
the
connecti
ng
r od small end)
S i ze Groups
MT801237
pi ston (grooye
widt h)
MT 801 1237
pi ston (groove
width)
White
21.0070-21.00 45 0.0045 0.0095
Blncl<
2 1. 0045-21.0020 0.0045 0.0095
Red
21 .0020-20 .9995 10.0045 0.0095
Green
20.9995-20.99 70 0.0045 0.0095
+0.055
2.5 + 0.030
2
_ .,.o.o;§
.0 ...LQ .O_v
5
-o .o :;o
+0023
0.040 I 0.077
0.025 0.057
0.025
I 0.065
Continued
Remarks
bosses inside lhe
piston
Ellipticity
and co-
nicily of t
he co n-
ne cting r od small
end within 0. 0025
The col our indi-
ces are marked
on one of the
in-
ternal end sides
of the pins
and on
the conn
ecting
rod bl ade at the
SJila ll end
Top compression
ri
ng
Bottom compres-
sion ring