Nanni N4.40, Workshop Manual

Page: 168 / 175

ENGINE
03-M-E3B, 03-M-DI-E3B, 03-M-E3BG, WSM
1-S98
Cylinder Correction (Oversize)
1. If the cylinder wear is more than the allowable limit, bore and
hone it to the specified dimension.
2. Replace the piston and piston rings with oversize ones.
Oversize : 0.25 mm (0.0098 in.)
NOTE
• If the maximum I.D. or the difference for the oversize
cylinder is more than the allowable limit, replace the
cylinder block with a new one.
M00000003ENS0144US1
Oversize cylinder
I.D.
Factory
spec.
D1503-M,
V2003-M,
V2003-M-BG,
V2003-M-T-BG
83.250 to 83.272 mm
3.2776 to 3.2784 in.
D1703-M,
D1803-M,
V2203-M,
V2403-M,
V2403-M-T,
D1803-M-DI,
V2403-M-DI,
V2403-M-DI-T,
D1703-M-BG,
V2203-M-BG,
V2403-M-BG
87.250 to 87.272 mm
3.4351 to 3.4359 in.
Allowable
limit
D1503-M,
V2003-M,
V2003-M-BG,
V2003-M-T-BG
83.420 mm
3.2843 in.
D1703-M,
D1803-M,
V2203-M,
V2403-M,
V2403-M-T,
D1803-M-DI,
V2403-M-DI,
V2403-M-DI-T,
D1703-M-BG,
V2203-M-BG,
V2403-M-BG
87.420 mm
3.4417 in.
Difference between
maximum I.D. and
minimum I.D.
Allowable limit
0.15 mm
0.0059 in.
Finishing
Hone to 2.2 to 3.0 µmRz
(0.000087 to 0.000118 in.Rz)
(1) Cylinder I.D. (Before Correction) (2) Cylinder I.D. (Oversize)
KiSC issued 06, 2009 A