Westerbeke BCGB Service Manual page 19

TIMING BELT DISASSEMBLY
5. Remove the timing belt.
NOTE:
lfthe timing belt is to be reused, draw an arrow on
the belt to indicate the direction of rotation (clockwise) ..
Camshaft Sprocket Removal
1. Remove the camshaft sprocket bolt without turning the
camshaft.
SPROCKET BOLT
Oil Pump
Sprock~
Flange Nut Removal
1. Remove the plug from the left side of the cylinder block.
2. Insert an 0.31 in (8 mm) diameter round bar to lock the
counterbalance shaft.
3. Remove the oil pump sprocket flange nut.
OIL PUMP SPROCKET
Crankshaft Bolt Removal
1.
Lock the crankshaft in position.
NOTE:
Do not tum the crankshaft.
2. Remove the crankshaft bolt.
Timing Belt Inspection
Replace the belt if any of the following conditions exist:
• Hardening of the back rubber, leaves no indent when
pressed with fingernail (back side is glossy).
• Cracks on rubber back.
• Cracks or peeling of canvas.
• Cracks on tooth bottom.
• Cracks on belt
• Abnormal wear of belt sides. The sides are normal if they
are
sharp as if cut by
a
knife.
• Abnormal wear on teeth.
• Tooth missing and canvas fiber exposed.
HARDENING
~
CRACKS ON UNDERSIZE
CRACKS ON TOP
Tensioner Inspection
CRACKS ON EDGE
ROUNDED EDGES
FLUFFY STRANDS
TOOTH MISSING
CANVAS EXPOSED
1. Replace the tensioner if the pulley binds, rattles or is noisy
when turned.
Engines & Generators
12