Section 03 ENGINE
Subsection 09 (PISTON AND CYLINDER)
PISTON DIAMETER
Nominal (new)
70.430 - 70.480 mm
(2.773 - 2.775 in)
Service limit
70.380 mm (2.771 in)
Using a small diameter bore gauge, measure pis-
ton pin bore diameter.
vmr2006-074-012
PISTON PIN BORE
Nominal (new)
17.002 - 17.008 mm
(.6694 - .6696 in)
Service limit
17.020 mm (.6701 in)
Replace piston if out of specifications.
Calculate the piston/cylinder clearance as follows.
Clearance = measured piston diameter –
piston diameter service limit
PISTON/CYLINDER WALL CLEARANCE
Nominal (new)
0.010 - 0.040 mm
(.0004 - .0016 in)
Service limit
0.10 mm (.0039 in)
If clearance exceeds specified tolerance, replace
worn part.
Piston Pin
Inspect piston pin for scoring, cracking or other
damages.
Using a micrometer, measure piston pin diameter.
vmr2006-074-010
PISTON PIN
Nominal (new)
16.994 - 17.000 mm
(.6691 - .6693 in)
Service limit
16.960 mm (.6677 in)
Replace piston pin if out of specification.
Connecting Rod
Using a small diameter bore gauge, measure small
end connecting rod diameter.
vmr2006-074-011
CONNECTING ROD SMALL END
Nominal (new)
17.016 - 17.034 mm
(.6699 - .6706 in)
Service limit
17.06 mm (.6717 in)
Replace connecting rod if out of specification.
vmr2006-074
87
Содержание BOMBARDIER DS250 2006
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