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5.4 Barrel Drive Assembly
The barrels are driven at a 1:1 ratio opposite the rotation of the turret by a 50 series sprocket and chain
system. The chain type is classified as Diamond Chain and is resistant to stretching after the brake-in
period of 30-40 hours of operation. During this brake-in period, some adjustment may be necessary.
Inspection
A butterfly configuration is used to drive the cradle assemblies that
accommodate the barrels. Each butterfly configuration drives two
(2) cradle assemblies and is adjusted by an idler arm assembly. The
operator can check for chain slack and determine if an adjustment
is necessary simply by rocking the cradle assembly in a forward and
reverse rotation while the CPC is powered OFF and the door is open.
If movement is present then adjustment is necessary. Visually
examine the chains and sprockets for signs of wear or
misalignment. If indications of wear are present use the following
procedure for further inspection:
Drive Component Removal
To remove and replace barrel drive components follow these procedures:
1.
Empty ALL barrels.
2.
Turn OFF the power at the safety disconnect and lock the handle in this position.
3.
Release the motor brake by pulling on the brake release
.
4.
Position the turret so that the drive components to be repaired or replaced are conveniently
located then set the motor brake.
5.
Remove the two (2) bolts holding the idler arm assembly in place and remove the idler arm from
the turret.
6.
Check the idler sprocket bearing for ease of movement and side play and inspect the sprocket for
wear. Replace bearing/sprocket assembly if necessary. Torque sprocket retainer nut to 50 ft-lbs.
7.
Remove the chain by means of the master link. Clean with mild solvent if necessary and lubricate
with penetrating oil such as “Slick 50
One Lube
”.
8.
Inspect the Barrel Drive Sprockets and Power Locks for movement. Visually inspect for rust
between the sprocket and cradle shaft and physically grasp the sprocket and check for movement
on the shaft. If movement is evident remove sprocket and examine Power Locks for wear. Replace
Power Locks, shaft or sprocket if wear is excessive.
9.
Install Idler Arm Assembly and any sprockets removed and slightly tighten, do not torque.
10.
Align Barrel and Turret Sprocket to Idler Sprocket using a measuring device. First measure the
distance from the turret disc (disc that the Idler Assy. is mounted on) the center of the Idler
Sprocket, record the distance. Next adjust the Barrel and Turret Sprockets so that the centerline of
the sprocket equals that of the recorded distance. Refer to photo
5-7 Align Sprockets
for a
Idler Assembly
