DeLuxe Stitcher M27 Series, Operation And Maintenance Manual

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To disassembly the Clutch-Brake unit (850677 or 850678) it will be necessary to remove the Drive
Pulley (7678) from the stitcher by removing the V-Belt (850730), Retaining Ring (P7863), and
Clutch Anchor Screw (7681). Disconnect the Ground and Solenoid wires, and swing the anchor strap
(FC9656) clear of the Drive Pulley Assembly and slide it off of the Drive Shaft. Remove the three
(3) Screws (UA4812.7) connecting the Drive Pulley to the Clutch-Brake unit.
When disassembling the Clutch-Brake unit, always mark the Spring Tang locations with reference to
which slots they go in if the same Springs are to be used for reassembly. To disassemble the Clutch-
Brake unit, proceed as follows:
Release the Actuator Lever so that the Clutch is engaged and the Brake is released. Remove the
Retaining Ring and the Shim Washer, if any, from the Input Hub (851321) end. Remove the Input
Hub by rotating opposite to the drive direction. Remove the Retaining Ring and the Shim Washer, if
any, from the Mounting Plate end.
Remove the Output Shaft Springs and the Control Collar (850888) Assembly by rotating the Output
Shaft (850891) in the drive direction. (Do not disassemble the brake Hub (850892) from the
Mounting Plate. (850890)) Remove the Control Collar from the Output Shaft and the Spring
Assembly by extracting toward the Brake Spring end.
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Disassembly (Figure 12)
Replace the Clutch (850888), Brake (850889) and Anti-Back (850962) Springs as required. Assemble
the Springs concentric and square to the Output Shaft.(850891) Assemble the Control Collar over the
Output Shaft and Spring Assembly by inserting it from the Brake Spring End (it will be necessary to
extend the Brake Springs using long nose pliers.) Place the Brake Spring Tang in any one (1) of the
nine (9) Control Collar slots at random.
Assemble the Output Shaft, Springs and Control Collar assembly to the Mounting Plate Assembly by
rotating the Output Shaft in the drive direction. Assemble the Retaining Ring (850886) to the Output
Shaft at the Mounting Plate end (the smooth surface facing the Brake Hub.) Check the end play
between the Hub and the Retaining Ring with a feeler gauge. There should be 0.004” to 0.010” end
play. Use a Shim Washer to adjust if necessary.
Rotate the Output Shaft in the drive direction until it reaches a full brake position. With the Clutch
Spring Tang NOT in slot, insert the Input Hub (851321) by rotating opposite to the drive direction.
Select one (1) of ten (10) Control Collar slots for the Clutch Spring Tang that will provide a 0.38” to
0.50” circumferential overtravel of the Control Collar when released.
Assembly (Figure 12)