Cub-cadet Yanmar 3TNV72 User Manual download pdf (Page 144)

ENGINE

TNV IDI Service Manual

6-45

Cylinder Block

• Method B: Use a feeler gauge to measure the

clearance (Figure 6-56, (3)) between the

thrust bearing (Figure 6-56, (1)) and

crankshaft (Figure 6-56, (2)). Record the

measurement. See Thrust Bearing on

page 6-9 for the service limit.

Figure 6-56

4. Remove the bearing cap. Do not remove the

bearing inserts at this time.

5. Wipe oil from the bearing insert and crankshaft

journal surfaces.

6. Place a piece of PLASTIGAGE

(Figure 6-57, (1)) along the full width of the

bearing insert.

Figure 6-57

IMPORTANT

Do not rotate crankshaft when using

PLASTIGAGE. A false reading may result.

7. Reinstall the bearing cap and tighten to

specification. See on page 6-14.

8. Remove the bearing cap.

Figure 6-58

9. Compare the width of the flattened

PLASTIGAGE (Figure 6-58, (1)) to the

graduation marks on the package. The mark

that most closely matches the width of the

flattened PLASTIGAGE will indicate the bearing

oil clearance. Record the measurement. See

Crankshaft on page 6-8 for clearance

specifications.

10. Repeat with the remaining main bearings.

Note: Be sure to note the markings on the main

bearing caps, or make marks so they can

be reinstalled in the same order as they

were removed. The “arrows” on the main

bearing caps point to the flywheel end of

the engine.

(1)

(2)

(3)

0001962

0001898

(1)

0001899

(1)

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