Cub-cadet Yanmar 3TNV72 User Manual download pdf (Page 140)

ENGINE

TNV IDI Service Manual

6-41

Cylinder Block

Removal of Camshaft

1. Before removing the camshaft, check the

camshaft end play.

• Method A: Install a dial indicator

(Figure 6-46, (1)) on the cylinder block. Move

the camshaft and gear (Figure 6-46, (2)) in

and out to measure the end play. Record the

measurement. See Camshaft on page 6-7 for

the service limit.

Figure 6-46

• Method B: Use a feeler gauge to measure the

clearance between the thrust plate

(Figure 6-47, (1)) and front camshaft bearing

(Figure 6-47, (2)). Record the measurement.

See Thrust Bearing on page 6-9 for the service

limit.

Figure 6-47

2. Remove two bolts (Figure 6-48, (3)) retaining

the camshaft thrust plate (Figure 6-48, (1)).

Figure 6-48

3. Extract the tappets (Figure 6-48, (5)) through

the top of the cylinder block. Mark the tappets

so they can be reinstalled in the same location.

4. Slowly pull the camshaft (Figure 6-48, (2))

assembly out of the engine being careful not to

damage the front camshaft bushing.

5. Remove the camshaft gear (Figure 6-48, (4))

only if the gear or camshaft require

replacement. Use a knife-edge puller and a

press to remove the gear. The gear is a

shrink-fit and will need to be heated to

356° - 392°F (180° - 200°C) to remove.

0002191

(1)

(2)

(1)

(2)

0001710B

0002186

(4)

(3)

(1)

(2)

(5)

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