Cub Cadet Yanmar 3TNV72 - Manual (Page 123)

ENGINE
6-24 TNV IDI Service Manual
Cylinder Head
Removal of Intake / Exhaust Valves
1. Put the cylinder head on the work bench with
the combustion side down (Figure 6-8).
Figure 6-8
2. Remove the valve stem cap (Figure 6-9, (1))
and keep with the valve it was installed on.
3. Using the valve spring compressor tool,
compress one of the valve springs (Figure 6-8).
4. Remove the valve keepers (Figure 6-9, (2)).
5. Slowly release the tension on the valve spring.
6. Remove the spring retainer (Figure 6-9, (3))
and valve spring (Figure 6-9, (4)).
Figure 6-9
7. Repeat procedure with all remaining valves.
Note: If the valves are to be reused, identify
them so they can be reinstalled in their
original location.
8. Turn the cylinder head so the exhaust port side
faces down. Remove the intake and exhaust
valves (Figure 6-9, (6)) from the cylinder head.
9. Remove the valve stem seals (Figure 6-9, (5)).
Removal of Valve Guides
Note: Removal of valve guides should be
postponed until inspection and
measurement procedures have been
performed. See Inspection of Valve
Guides on page 6-26.
If the valve guides are not within specifications, use
a drift pin and hammer to drive the valve guides
(Figure 6-10, (1)) out of the cylinder head.
Figure 6-10
0000191
(1)
(2)
(3)
(4)
(5)
(6)
0002151
(1)
0002152
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