Husqvarna TE511 - Piston Assembly; Piston Diameter Check; Piston Stroke Clearance Definition

F1.56
H06461
H01756
H01755
ENGINE DISASSEMBLY/REASSEMBLY
1
st
edition (08-2010) _Rev. 11-2010
Piston diameter check
Check
• Measure piston diameter (A) crosswise to piston pin axis.
• Size (B) denes the reading beyond piston pin lower edge.
Technical specications
Piston diameter
Tolerance group 1
New, transverse
to piston pin axis,
above piston lower
edge by 4 mm
450
97.925
+0.005
mm
- 0.005
480
100.925
+/- 0.005
mm
Piston diameter
Tolerance group 2
New, transverse
to piston pin axis,
above piston lower
edge by 4 mm
450
97.935
+0.005
mm
- 0.005
480
100.935
+/- 0.005
mm
Result: Piston diameter is outside tolerance values
Action:
Replace piston.
Piston stroke clearance denition
Check
• Piston diameter (B) less cylinder diameter (A) = piston clearance.
Technical specications
Piston installation
clearance
0.06...0.08 mm
Result: Piston stroke clearance is outside tolerance values.
Action:
Replace piston and cylinder.
Piston assembly
• Fit piston with the arrow pointing to exhaust side.
Caution
Comply with the markings for cylinders and pistons unit.
The marks denoting cylinder and piston groups must match.