Cub-cadet Yanmar 3TNV72 User Manual download pdf (Page 128)

ENGINE

TNV IDI Service Manual

6-29

Cylinder Head

Squareness

Use a flat surface and a square to check each

spring for squareness (Figure 6-22). See Valve

Spring on page 6-6 for the service limit.

Figure 6-22

Free Length

Use a caliper to measure the length of the spring

(Figure 6-23). See Valve Spring on page 6-6 for

the service limit.

Figure 6-23

Reassembly of Cylinder Head

Use new gaskets, O-rings and seals on reassembly

of cylinder head.

IMPORTANT

Liberally oil all components during

assembly to prevent premature wear or

damage.

Reassembly of Valve Guides

1. The valve guides are installed into the cylinder

head with an extremely tight press-fit. Before

installing the valve guides, place the valve

guides in a freezer for at least twenty minutes.

This will cause the valve guides to contract,

making it easier to install the valve guides in

place.

2. Immediately after removing the valve guides

from the freezer, insert the valve guides

(Figure 6-24, (1)) in their proper positions.

Figure 6-24

0000201

0000200

(1)

0002152

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Cub-cadet Yanmar 3TNV72 User Manual Page 128