SECTION F14
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CHECKING REAR SHIMMING
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1
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Slide the right side gaiter back to give access
to the shims and polyurethane washer.
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2
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Insert feeler gauges as required between the
shims and polyurethane washer (see Fig F12). The
ideal clearance is 0.010 in. (0.025 mm). Make a
note of the actual clearance.
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SECTION 15
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ADJUSTING FRONT SHIMMING
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There are two methods of adjusting front
shimming, the quicker method (Method 1) deals with
the mounting in situ and is intended for checking
as an item of routine maintenance. Method 2 deals
with removal of the complete front mounting without
removing the power unit. This method is preferred
where the mounting has seen a great deal of service
and requires a thorough cleaning and the
replacement of worn components.
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METHOD 1
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1
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Remove the self locking nut and plain washer
from the mounting bolt.
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2
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Align the flats on the hexagon of the mounting
bolt with the timing case casting of the engine.
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3
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Using a soft metal drift to avoid damaging the
threads drive the bolt through sufficiently that
the gaiter, spacer and polyurethane washer can be
removed together.
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4
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Remove the end cap and note the shim
thicknesses.
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Shims are available in 0.005 in., 0.010 in.,
0.020 in. and 0.030 in. thickness. If at the time
of stripping, the clearance was found to be, for
example, 0.030 in., then a shim of 0.020 in.
thickness should be added. It is obviously more
desirable to use one 0.020 in. shim than a
collection of shims to this thickness which tend to
deteriorate faster. Prior to reassembly, clean all
the parts including inside the gaiters, and grease
lightly. Examine the polyurethane washer for
excessive wear producing uneven thickness and
replace if necessary. Proceed as follows:
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5
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Reassemble the gaiter, spacing collar and shims
after attention, in the order shown in Fig. F14.
Note that the reassembly procedure is a reversal of
that used in dismantling but take care to fit the
cap with shims well over the actual mounting to
allow room for the gaiter, spacing washer and
polyurethane washer to be fitted together.
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6
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Secure the mounting bolt to a torque reading of
25 Ib./ft. (3.456 Kg/m).
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