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42hW-201601
CHAPTER 2 ENGINE3015R(h)/3515R(h)/4015R(h)/F36R(h)/F42R(h) TRACTOR
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6.3.4 PISTON & PISTON RING
If the main measurement value is over the limit,
replace the pistons
If there is any damage or scratch on the surface,
replace it
Piston outer diameter
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•
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ITEM SPECIFICATION LIMIT
Piston outer
diameter
87.95 ~ 87.97 87.90
Minimum
clearance
with cylinder
0.060 ~ 0.080 -
When replacing the piston ring, make the ring
groove clean. And assemble it toward top of the
piston to be saw the mark on top and make sure
it moves well.
When the piston ring assemble, ring’s cut
direction shouldn’t be in side-pressured area and
make it cross each other by 120 degree.
Measure each main area and replace it if it is over
limit.
Measure the piston ring clearance
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•
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ITEM SPECIFICATION LIMIT
First Ring 0.25~0.40 1.5
Second Ring 0.50~0.70 1.5
Oil Ring 0.20~0.40 1.5
(mm)
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