Westerbeke 6.5 SBCG-60HZ Service Manual page 62

CRANKSHAFT
I
BEARINGS AND OIL SEAL
NUMBERS INDICATE THE
SUGGESTED ORDER OF
DISASSEMBLY
CYLINDER BLOCK
8
CRANKSHAFT BEARING (UPPER)
INSPECT THE JOURNALS
FOR UNEVEN .wEAR.
CHECK FOR CRACKS, BENDS,
AND CLOGGED OIL HOLES.
PULLEY BOLT
_d
TORQUE 98- 105 FT-LBS ·
(135- 145 Nm)
_@)
MAIN BEARING BOLT
TORQUE 36- 40 FT-LBS
[50-56Nm] ·
CRANKSHAFT INSPECTION
1. Check the journals and pins for damage, seizure and
cracks. Check the journals ·contact surface for uneven
wear and replace if badly damaged.
2. Measure the outside diameter of the journal and the
inside diameter of the main bearing. If the clearance (oil
clearance) exceeds the limit, replace the main bearing and
also the crankshaft, if nece-ssary. Otherwise, fabricate an
undersized cranksh'aft and replace the main bearing with
an undersized one.
Standard Limit
O.OQ08- 0.00181n (0.021 - 0.045mm) .004in (0.1mm)
3. When grinding the crankshaft to under-size, take note of
the "R" dimensions of the fillets of the journal and pin
area.
MEASURING THE
CRANKSHAFT O.D.
_ AND BEARING I.D.
MEASURING POSmON
-c)~
Engines & Generators
51
OIL SEAL
MEASURING
DIRECTION