Piston Disassembly; Cylinder Check - Husqvarna TC449 Workshop Manual

H01754
H01895
1 edition (08-2010) _Rev. 11-2010
st
ENGINE DISASSEMBLY/REASSEMBLY

Piston disassembly

• Watch stop rings correct position: ring opening shall be pointing up (arrow).
• Disassemble the following parts:
- Left and right stop rings (1).
- Piston pin (2)
- Piston (3)

Cylinder check

Check
• Check cylinder liner and sealing surface for damages.
• Measure bore using an inside micrometer gauge in three points (A, B, C).
Technical specifications
Cylinder bore diameter
Tolerance group 1
Cylinder bore diameter
Tolerance group 2
Result: Damaged cylinder or outside tolerance values
Action:
• Replace cylinder.
F1.55
New, 40 mm from
450 cc
upper edge
98.000
480 cc
101.000
New, 40 mm from
450 cc
upper edge
98.012
480 cc
101.012
+0.012
mm
- 0
+0.012
mm
- 0
+0.012
mm
- 0
+0.012
mm
- 0