Piston And Piston Pin Inspection - Linhai HY740STL 2018 Service Manual

CHAPTER 3 ENGINE

PISTON AND PISTON PIN INSPECTION

1. Measure:
⚫Piston skirt diameter
Out of specification → Replace .
○,
10.0mm from the piston bottom edge.
a
Valve skirt diameter:
101.95-101.97 mm
< Limit: 101.87 mm>
2. Calculate:
⚫Piston-to-cylinder clearance
Piston-to-cylinder clearance=
Cylinder bore-Piston skirt diameter
Refer to "CYLINDER" section for cylinder
bore measurement.
Out of specification → Replace the piston
and piston rings as a set.
Piston-to-cylinder clearance:
0.03 - 0.062 mm
<Limit:0.15mm>
3. Measure:
⚫Piston pin bore diameter
Out of specification → Replace.
Piston pin bore diameter:
23.002-23.008mm
<Limit: 23.03mm>
4. Measure:
⚫Piston pin outside diameter
Out of specification → Replace.
Piston pin bore diameter:
22.99-23.0mm
<Limit: 22.98mm>
5. Inspect:
⚫Piston pin
Blue discoloration/groove →
replace.
Clean or
M750L SERVICE MANUAL 18.0
CHAPTER 3 ENGINE PAGE 3- 40