Cub-cadet Yanmar 3TNV72 User Manual download pdf (Page 142)

ENGINE

TNV IDI Service Manual

6-43

Cylinder Block

1. Using a feeler gauge, measure the connecting

rod side clearance (Figure 6-50). See

Connecting Rod on page 6-12 for the standard

limit. If the measurement is out of specification,

replace the crankshaft, connecting rod, or both.

Figure 6-50

IMPORTANT

Mark the connecting rod caps and

connecting rods so the caps and connecting

rods stay together.

2. Remove the bearing cap. Do not remove the

bearing inserts at this time.

3. Wipe oil from the bearing insert and crankshaft

journal surfaces.

4. Place a piece of PLASTIGAGE

(Figure 6-51, (1)) along the full width of the

bearing insert.

Figure 6-51

IMPORTANT

Do not rotate crankshaft when using

PLASTIGAGE. A false reading may result.

5. Reinstall the bearing cap and tighten to

specification. See Special Torque Chart on

page 6-14.

6. Remove the bearing cap.

Figure 6-52

7. Compare the width of the flattened

PLASTIGAGE (Figure 6-52, (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 measurements. See

Crankshaft on page 6-8.

8. Repeat with the remaining connecting rods.

IMPORTANT

Do not allow the connecting rod to contact

the crankshaft journal during piston

removal. Damage to the bearing journal

may result.

9. Use a wooden dowel against the connecting

rod and tap the piston / connecting rod

assembly out of the cylinder.

10. Mark the cylinder number on the piston and

connecting rod.

000021

0001898

(1)

0001899

(1)

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