Autolube Oil Pump; Checking The Crankshaft - Yamaha CS50 Service Manual

INSPECTION AND REPAIR

AUTOLUBE OIL PUMP

Internal wear or poor operation may cause the
pump to deviate from its factory adjustment.
However, this is very uncommon. If incorrect
operation is suspected, inspect the following:
1. Inspect:
• supply line Obstruction Apply air under
pressure.
Wear/Damage
2. Inspect:
• drive gear teeth of the autolube oil pump
• gear teeth driven by autolube oil pump
Pitting/Wear/Damage
EAS00394

CHECKING THE CRANKSHAFT

1. Measure:
• crankshaft runout
Out of specification
haft, bearing or both.
NOTE:
Turn the crankshaft slowly.
2. Measure:
• big end side clearance
Out of specification
bearing, crankshaft pin, or connecting rod.
3. Measure:
• crankshaft width
Out of specification
haft.
4-17
Replace.
k
C
Replace the cranks-
Maximum crankshaft runout
0.03 mm
k
D
Replace the big end
Big end side clearance
0.2 ~ 0.5 mm
k
A
Replace the cranks-
Crankshaft width
37.90 ~ 37.95 mm
ENG
Replace