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14 March 1995

SERVICE BULLETIN

Number 95-1

TO CHECK THE BESCODYNE CLUTCH/BRAKE STACKS FOR WEAR


Procedure for checking Brake and Clutch Stacks for wear.

An easy procedure has been established to visually check the Brake and Clutch stacks for Wear to determine whether or not they need to be replaced. 

Two (2) "Stack Wear" Grooves have been machined in the Input Shaft (#2) Lugs to facilitate this visual check. (See Figure 1)

Stack Wear Grooves


Figure 1

CAUTION

Disconnect and lock-out all Electrical Power to the Drive Motor. This step must be taken to avoid any possibility of personal injury or damage to the Drive Unit

 

  1. Remove the Inspection Pipe Plug (#14) from the top of the Input Housing.


    A. CLUTCH STACK WEAR (See Figure 2)

  2. Apply air pressure to the Clutch Port.

  3. Using a flash light, observe the Clutch Stack through the Inspection Port.

    If the rear surface of the Clutch Thrust Plate (#5) has moved up to or past the "Stack Wear" Groove #2, the Clutch Stack needs to be replaced.

  4. Exhaust the air pressure from the Clutch Port.    



    B. BRAKE STACK WEAR (See Figure 2)

  5. Apply air pressure to the Brake Port.

  6. Using a flash light observe the Clutch Stack through the Inspection Port.

    If the rear surface of the Clutch Thrust Place has moved up to or past the "Stack Wear" Groove #1, the Brake Stack is worn and needs to be replaced.

IMPORTANT NOTE:

Even though both the Brake Stack and the Clutch Stack can individually be checked for wear. If either Stack is worn and needs to be replaced, both Stacks should be replaced as a complete set. Refer to Service Manual and Repair Parts for Clutch/Brake Drives (502-03/20-001) Besser Catalog No. 437629F001, Section 7-DISASSEMBLY and Section 9 - REASSEMBLY for Brake and Clutch Stack Replacement.

Check Brake and Clutch Stacks for Wear.

Figure 2

 

SAFETY BULLETIN

This notice is issued to advise you that some previously accepted shop practices may not be keeping up with changing Federal and State Safety and Health Standards. Your current shop practices may not emphasize the need for proper precautions to insure safe operation and use of machines, tools, automatic loaders and allied equipment and/or warn against the use of certain solvents or other cleaning substances that are now considered unsafe or prohibited by law. Since many shop practices may not reflect current safety practice and procedures, particularly with regard to the safe operation of equipment, it is important that you review your practices to ensure compliance with Federal and State Safety and Health Standards.

IMPORTANT

The operation of any machine or power-operated device can be extremely hazardous unless proper safety precautions are strictly observed. Observe the following safety precautions:

Always be sure proper guarding is in place for all pinch, catch, shear, crush and nip points.

Always be sure that all personnel are clear of the equipment before starting it.

Always be sure the equipment is properly grounded.

Always turn the main electrical panel off and lock it out in accordance with published lockout/tagout procedures prior to making adjustments, repairs, and maintenance.

Always wear appropriate protective equipment such as safety glasses, safety shoes, hearing protection and hard hats.

Always keep chemical and flammable material away from electrical or operating equipment.

Always maintain a safe work area that is free from slipping and tripping hazards.

Always be sure appropriate safety devices are used when providing maintenance and repairs to all equipment.

Never exceed the rated capacity of a machine or tool.

Never modify machinery in any way without prior written approval of the Besser Engineering Department.

Never operate equipment unless proper maintenance has been regularly performed.

Never operate any equipment if unusual or excessive noise or vibration occurs.

Never operate any equipment while any part of the body is in the proximity of potentially hazardous areas.

Never use any toxic flammable substance as a solvent cleaner.

Never allow the operation or repair of equipment by untrained personnel.

Never climb or stand on equipment when it is in operation.

It is important that you review Federal and State Safety and Health Standards on a continual basis. All shop supervisors, maintenance personnel, machine operators, tool operators, and any other person involved in the setup, operation, maintenance, repair or adjustment of Besser-built equipment should read and understand this bulletin and Federal and State Safety and Health Standards on which this bulletin is based.