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18 ENGINE
18.4.22 Checking the valves
200193-10
302809-10
18.4.23 Checking the valve springs
305015-10
-
Check the valve plate for run-out.
Valve - run-out
At the valve plate
s; 0.05 mm (s; 0.002 in)
If the measured value does not meet specifications:
-
Change the valve.
-
Check sealing seat
O
on the valve.
Valve - sealing seat width
Intake
Valve - sealing seat width
Exhaust
1 .40 mm (0.0551 in)
1.40 mm (0.0551 in)
160
If the sealing seat is not centered on the valve seat or deviates from the speci
fication:
-
Rework the valve seat.
-
Check the valve springs for breakage and wear (visual check).
•
Info
I
Intake valves are marked with a green color coding.
Exhaust valves are marked with a brown color coding.
If the valve spring is broken or worn:
-
Change the valve spring.
-
Measure the length of the valve springs.
Valve spring
Minimum length of intake valve
Minimum length of exhaust valve
I
42 mm (1 .65 in)
I
42 mm (1 .65 in)
If the measured value does not meet specifications:
-
Change the valve springs.
18.4.24 Checking the valve spring seat
305014-10
-
Check the valve spring seat for breakage and wear (visual check).
If the valve spring seat is broken or worn:
-
Change the valve spring seat.
-
Measure the thickness of the valve spring seat.
I
Valve spring seat - thickness
I
0.90 ... 1.10 mm (0.0354 ... 0.0433 in)
If the measured value does not meet specifications:
-
Change the valve spring seat.
Содержание FE 250 AU 2014
Страница 2: ......
Страница 87: ...12 FUEL TANK SEAT TRIM Remove the special tools Join the fuel hose connection 85 ...