Checking/Measuring The Piston - Husqvarna FE 350 2016 Repair Manual

18.4.15

Checking/measuring the piston

e -' ­
•
Info
The cylinder size
-
Using a straightedge and the special tool, check the sealing
area of the cylinder head for distortion.
I
Feeler gauge (59029041100)
Cylinder/cylinder head - dis-
tortion of sealing area
If the measured value does not meet specifications:
-
Change the cylinder.
305004-10
-
Use the special tool to measure clearance
rings in the piston ring groove.
Guideline
Piston ring - groove clear­
ance
I
Feeler gauge (590290411 00)
6)
If play
-
Change the piston and piston rings.
400995-10
-
Check/measure the cylinder.
-
Check the piston sliding surface for damage.
If the piston sliding surface is damaged:
-
Replace the piston and, if necessary, the cylinder.
-
Check that the piston rings move easily in the piston ring
grooves.
If the piston ring is stiff:
-
Clean the piston ring groove.
305017-10
-
Check the piston rings for damage.
If the piston ring is damaged:
-
Replace the piston ring.
•
I
-
Check the piston pins for discoloration or signs of wear.
If the piston pin shows severe discoloration/signs of wear:
-
Change the piston pin.
-
Place the piston pin in the connecting rod and check the
seating for play.
If the piston pin seating has excessive play:
-
Change the connecting rod and piston pin.
O
is marked on the cylinder collar.
(� p. 360)
:;; 0.10 mm (:;; 0.0039 in)
:;; 0.08 mm(:;; 0.0031 in)
(� p. 360)
is larger than the specified value:
(� p. 206)
Tip
An old piston ring can be used to clean the
piston ring groove.
Info
Mount the piston ring with the marking facing
upward.
18 ENGINE
6)
of the piston
207