Yamaha XV17ASZ Service Manual download pdf (Page 70)

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ENG

CRANKSHAFT AND CONNECTING RODS

CRANKSHAFT AND

CONNECTING RODS

EAS00398

CHECKING THE CRANKSHAFT AND

CONNECTING RODS

1. Measure:

• crankshaft runout

Out of specification

→

Replace the crank-

shaft.

2. Check:

• crankshaft journal surfaces

• crankshaft pin surfaces

• bearing surfaces

Scratches/wear

→

Replace the crankshaft

and bearings.

• generator shaft drive gear

Damage/wear

→

Replace the crankshaft.

3. Measure:

• crankshaft pin-to-big end bearing clearance

Out of specification

→

Replace the big end

bearings.

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The following procedure applies to all of the

connecting rods.

CAUTION:

Do not interchange the big end bearings

and connecting rods. To obtain the correct

crankshaft pin-to-big end bearing clear-

ance and prevent engine damage, the big

end bearings must be installed in their orig-

inal positions.

a. Clean the big end bearings, crankshaft pins,

and the inside of the connecting rod halves.

Maximum crankshaft runout

0.04 mm (0.0016 in)

Crankshaft pin-to-big end bearing

clearance

0.037 ~ 0.074 mm

(0.0015 ~ 0.0029 in)

<Limit>: 0.09 mm (0.0035 in)

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Yamaha XV17ASZ Service Manual Page 70

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