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Engine – Cub Cadet Yanmar 3TNV72 User Manual

Page 149

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ENGINE

6-50

TNV IDI Service Manual

Cylinder Block

Figure 6-69

2. Measure the connecting rod twist

(Figure 6-70, (1)) and bend (Figure 6-70, (2))
using a connecting rod alignment tool
(Figure 6-71). Record the measurements. See
Connecting Rod on page 6-12 f
or
specifications.

Figure 6-70

Figure 6-71

3. Place the connecting rod bearing inserts into

the connecting rod and connecting rod cap.
Install the rod cap and tighten the bolts to the
specified torque.

4. Measure the inside diameter. Record the

measurements. See Crankshaft on page 6-8 for
specifications.

Inspection of Tappets

1. Inspect the tappet contact surfaces for

abnormal wear (Figure 6-72, (1)). Normal wear
will be even as shown in (Figure 6-72, (2)).
Slight surface defects can be corrected using
an oilstone.

Figure 6-72

2. Measure the outside diameter of the tappet

stem (Figure 6-73, (1)). Record the
measurements. See Tappet on page 6-12 for
the service limit.

Figure 6-73

3. Measure the tappet bores in the cylinder block.

Record the measurements. See Tappet on
page 6-12 f
or the service limit.

0001724A

(1)

(2)

0001896

(1)

(2)

0000242

0002194

(1)

(2)

0002195

TNV_IDI_ServiceManual_(3TNV72 for YN only).book 50 ページ 2007年11月29日 木曜日 午後2時58分