Cub-cadet Yanmar 3TNV72 User Manual download pdf (Page 160)

ENGINE

TNV IDI Service Manual

6-61

Cylinder Block

4. Lubricate the camshaft lobes and tappets with

clean oil or assembly lube. Reinstall the tappets

in their respective locations in the cylinder

block. Push the tappets fully into the tappet

bores until they make solid contact with the

camshaft.

5. If removed, reinstall the fuel injection pump.

Adjust the fuel injection timing after installation.

See Checking and Adjusting Fuel Injection

Timing on page 7-19.

Installation of Timing Gears

1. Set No. 1 piston to top dead center.

2. Rotate the camshaft until mark

(Figure 6-98, (C)) is approximately at the

9 o’clock position.

3. Lubricate the idler gear (Figure 6-97, (3)),

bushing (Figure 6-97, (2)) and idler gear shaft

(Figure 6-97, (1)) with clean engine oil or

assembly lube.

Figure 6-97

4. Align the timing gears as shown in Figure 6-98.

5. Reinstall the idler gear and idler gear shaft. Be

sure the oil hole in the bushing is facing toward

the top of the engine.

6. Ensure all three timing marks

(Figure 6-98, (A, B, and C)) are aligned.

1 – Fuel Injection Pump Gear

2–Camshaft Gear

3 – Optional Accessory Drive Gear

4 – Crankshaft Gear

5 – Idler Gear

Figure 6-98

7. When all gears are properly aligned, tighten the

idler gear retaining bolts to specified torque.

See Special Torque Chart on page 6-14 for

specifications.

Installation of Gear Case Cover

1. Apply a continuous bead of ThreeBond Liquid

Gasket No. 1212, Yanmar Part No.

977770-01212 to the mounting area of the gear

case cover (Figure 6-99, (1)). Be sure to circle

the bolt holes.

Figure 6-99

2. Reinstall the dowels (Figure 6-99, (3)) and a

new O-ring (Figure 6-99, (2)).

0002182

(3)

(2)

(1)

0002190

(1)

(2)

(3)

(4)

(5)

0002181

(3)

(2)

(1)

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