Timing Belt - Westerbeke 5.0KW BCG-60Hz Operator's Manual

ENGINE ADJUSTMENTS
NOTE:
WESTERBEKE recommends that the following engine
adjustments be peiformed by a competent engine mechanic.
The information below
is
provided to assist the mechanic.
Tensioner Spring/Timing Tensioner Installation
1. Install the tensioner spring and timing belt tensioner.
2. Hook the tensioner spring onto the bend of the timing belt
tensioner bracket and the stopper pin on the cylinder
block.
3. Move the timing belt tensioner as close as possible to the
water pump; temporarily tighten the tensioner nut.
TIMING BELT
TENSIONER
Timing Belt Insiallation
1. Align the trlangular marking on ,the camshaft sprocket
with a marking on the timing belt rear cover.
2. Align the notch in the crankshaft sprocket flange with
the marking on the front case.
3. Align the triangular marking on the oil pump sprocket
with the marking on the front case, and then insert a 65
mm (2.56 in.) or longer, 8 mm (0.31 in.) diameter
round bar into the plug hole in the left side of the
cylinder block.
MARKING ON
TIMING BELT
REAR COVER
TRIANGULAR'
MARKING ON
CAMSHAFT
SPROCKET
TIMING BELT
TENSIONER,
MARKING
ON
FRONT
At this time, check that the moveable range of teeth on
the oil pump sprocket is according to specifications.
Standard value: 4 to 5 teeth in forward direction.
1 to 2 teeth in reverse direction.
REVERSE
OIL PUMP
SPROCKET
4. If the movable range of the oil pump sprocket exceeds
the specified range, correct as follows:
a. Pull out the round bar from the plug hole in the left
side of the cylinder block.
b. Turn the oil pump sprocket one turn at a time until
the round bar can again be inserted.
c. Check that the movable range of the oil pump
sprocket is in the specified value.
S. Set the timing belt over the crankshaft sprocket and
then over the oil pump sprocket and camshaft sprocket,
in that order.
NOTE:
Ensure that the tension side of the timing belt is
not slack. Keep the round bar inserted until the timing
belt has been placed. After this step, be sure to remove
the round bar.
6. Apply counterclockwise force to the camshaft sprocket
to make the belt taut on the tension side, and make
sure that ail timing marks are lined up.
CAMSHAFT
SPROCKET
TENSION SIDE
7. Loosen the temperorarily tightened tensioner nut on
the water pump side 1 or 2 turns, and tension the belt
making use of spring force.
NOTCH IN
CRANKSHAFT
SPROCKET
flANGE
CASE
-~----'WESTERBEKE
Engines & Generators
24