MAINTENANCE
Crank-Shaft Assembly - 24 inch Machine.
The Crank-Shaft on 24 inch machines has two
Counter Balance Weights ‘
A
’. They are Keyed to the
Shaft and locked with Set Screws.
It is necessary to remove one of the Weights if the
Driven Sheave needs to be removed.
To remove the Counter Balance Weight:
•
Remove the Crank-Shaft Assembly, see
page 4-8.
•
Remove a Connecting Rod.
See page 4-8.
•
Remove a Crank-Shaft Bearing.
See page 4-9.
•
Back-off the Set Screws ‘
B
’, and slide the
Weight off the Shaft. Remove the Key ‘
C
’.
•
Remove the Driven Sheave. See page 4-9.
On re-assembly the Counter Balance Weight should
be located against the Bearing Lock-Collar.
IMPORTANT
When installing the 24 inch Crank-Shaft Assembly
into the frame, the Shim Plates ‘
D
’
must be fitted
between the Bearing Flange and the Frame
to
allow the Counterweights to clear the Frame.
.
Installing Crankshaft Assembly.
•
Fit a new Drive Belt over the Drive Motor
Sheave.
•
Carefully raise the Crankshaft Assembly into
position and bolt it into place.
•
Fit the Drive Belt, with ‘slack’, onto the Crank-
shaft Sheave
•
With a ‘Straight Edge’ ‘
E
’, align the Crankshaft
and Drive Motor Sheaves, then tighten the Bolts
in the Crankshaft Sheave Taper Lock Bushing.
•
Adjust Drive Belt tension as shown on page 4-7
.
4-10
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