Crankshaft Main Bearing Inspection - Suzuki GF60A Service Manual

1D-60 Power Unit Mechanical:
Out-of-Round and Taper (Uneven Wear) of Journals
An unevenly worn crankshaft journal shows up as a
difference in diameter at a cross section or along its
length (or both).
This difference, if any, is determined by taking
micrometer readings.
If any journal is badly damaged or if measurements
exceed service limit, replace crankshaft.
Special tool
(A): 09900–20202 (Micrometer (25 – 50 mm))
Out-of-round and taper
Service limit: 0.01 mm (0.0004 in.)
Out-of-round: A – B
Taper: a – b
Crankshaft journal outside diameter
Standard: 44.982 – 45.000 mm (1.7709 – 1.7717 in.)
(A)

Crankshaft Main Bearing Inspection

Crankshaft Main Bearing Visual Inspection
Check bearings for pitting, scratches, wear or damage.
If any improper condition is found, replace both upper
and lower halves.
Always replace both bearing halves, never replace only
one half of a bearing set.
Crankshaft Journal Oil Clearance
Check clearance using Plastigauge according to the
following procedure.
NOTE
Assemble each bearing in its original
position before checking clearance.
1) Clean surface of bearing holder (crankcase, and
cylinder), bearing, and main bearing journal.
2) Install main bearing (1) to cylinder and crankcase.
NOTE
• Align tab "A" of bearing with notch in
cylinder and crankcase.
• Do not apply engine oil to bearing.
• Install lower bearing half with oil hole /
groove towards cylinder side.
IAJ611140224-01
ZAJ6111406027
I9J011140073-01
1
"A"
1
1. Oil hole / groove
1
IAJ611140225-01
IAJ611140226-01