Cub-cadet Yanmar 3TNV72 User Manual download pdf (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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