Service Bulletin Number 2001-02

14 February 2000

SERVICE BULLETIN

Number 00-2
Revised Jan 02

BULL GEAR AND PINION INDEXING AND REPLACEMENT RECOMMENDATIONS

(applicable to Dynapac®, Superpac® and Ultrapac® concrete products machines)

WARNING:
At all times while working on the bull gear and pinion the machine should be locked out using appropriate procedures.

Step 1. Insure that the bull gear and pinion teeth are free of debris that may be embedded in rust proof coating.

Step 2. Run machine to 1st stop.

Step 3. At the location of maximum gear tooth engagement, place steel feeler gage stock on gap side of the center most tooth (See Figure 1). The gap side may be on the top or bottom depending on bull gear loading. The measured gap from this point forward will be referred to as backlash.

Figure 1

A bull gear and pinion backlash of 0.075 inches or greater requires the bull gear to be indexed. Once the bull gear is indexed, repeat the backlash measurement at 1st stop. To achieve optimum life of the bull gear, it is strongly recommended that the pinion be replaced when indexing the bull gear.

The bull gear requires replacement ONLY if all of the following apply:

1)The bull gear has been indexed to all new locations. The bull gear should be indexed by 2 bolt holes. Maintain a record of how many times the bull gear has been indexed.

2)The Pinion gear has been replaced with a new one. (Refer to Service Bulletin 96-5, V3-12 Pinion Shaft Assembly if you have the new pinion locking assembly).

3) If you have rotated the bull gear to a new location and the backlash is still greater than 0.075 inches at 1st stop.

Other important considerations to improve the bull gear and pinion life.

Check air pressure on the main drive Bescodyne for 70 PSI maximum on clutch and 50 PSI maximum on brake.
Insure base plate of the machine is properly grouting. Grout must be intact to insure a solid foundation for the machine.
Insure debris is not allowed to come in contact with the bull or pinion gear. Take necessary precautions to prevent material from falling onto the gears. No lubricant is used on bull gear & pinion.
Maintain recommended clearance for the feed arm shaft roller gap, refer to Besser drawing # 490754.

Specific Torque Values:	Bull Gear Bolts = 310 lb-ft
	Cam Stack Bolts = 1200 lb-ft

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.