Driveline Design and Safety Checklist
This "Checklist" is primarily intended for usage by farm implement designers. It provides safety information/reminders important for the design, selection, labeling and testing of PTO drivelines.
NOTE: This manual may be downloaded and reproduced for non-commercial usage.
The first step is to specify and test the driveline to operate properly under expected field conditions.
- Specify and test the proper size joints and telescoping members based upon the power required by the implement, speed of rotation, joint angles, joint phasing, shock loads and expected life.
- Design and test the hitch geometry to prevent the driveline from:
- Extending beyond the recommended maximum length.
- Bottoming out.
- Reaching a position which would allow the joints to lock.
- Exceeding the maximum allowable angle for constant velocity (CV) joints.
- Provide a proper operational clearance zone for the driveline to avoid damage to the driveline or guard components. Some common areas of interference are:
- Three point linkage
- Extended or eye loop hitch pins
- Hydraulic hoses
- Hitch jacks
- Tractor tires
- Tractor drawbar clevice / hammerstrap hitch
- Implement tongue
- Implement frame members
- Specify and test telescoping members to allow the lowest possible thrust loads, considering the expected working conditions.
- Specify and test torque limiters to control excessive shock loads.
- Where necessary, specify and test overrunning clutches to prevent inertial loads from overpowering the tractor.
- Provide a support location to secure the driveline on the implement when it is disconnected from the tractor to prevent damage during storage or transportation of PTO shafts.
- On stationary implements provide a means to limit the extension of the driveline.