Nanni 5.280HE Workshop Manual page 106

03-M Series, WSM
Correcting Cylinder (Oversize)
1. When the cylinder is worn beyond the allowable limit, bore and
hone it to the specified dimension.
Factory
spec.
Oversize cylinder I.D.
Allowable
limit
Hone to 2.2 to 3.0 mm μR max.
∇∇∇
Finishing
(0.00087 to 0.00118 in. μR max.)
2. Replace the piston and piston rings with oversize ones.
Oversize : 0.25 mm (0.0098 in.)
Parts Name Model
D1503-M
D1703-M
Piston
D1803-M
V2203-M
V2403-M
D1503-M
D1703-M
Piston ring assembly
D1803-M
V2203-M
V2403-M
NOTE
• When the oversize cylinder is worn beyond the allowable
limit, replace the cylinder block with a new one.
(1) Cylinder I.D. (Before Correction)
S-89
DIESEL ENGINE
83.250 to 83.272 mm
D1503-M
3.27756 to 3.27843 in.
D1703-M
D1803-M 87.250 to 87.272 mm
V2203-M 3.43504 to 3.43591 in.
V2403-M
83.400 mm
D1503-M
3.2835 in.
D1703-M
D1803-M 87.400 mm
V2203-M 3.4409 in.
V2403-M
Code Number Marking
1A021-21900 0.25 OS
1A091-21900 0.25 OS
1A021-21090 0.25 OS
1A091-21090 0.25 OS
(2) Cylinder I.D. (Oversize)
W1034448
KiSC issued 08, 2012 A