Safety Clutches
PTO Safety Clutch Selector
Pick the bore that matches your implement’s input shaft. All filters are optional.
Adjusting and Fitting
Standard duty (silver or gold spring) clutches
- Compress the springs fully, then back off 2 turns.
- Fine tune so the clutch slips occasionally.
- Once a year, release the springs completely and let the clutch slip to polish the pressure plate.
- Re-tension clamp bolts after 10 hours of use, then every 100 hours.
Blue Torque heavy duty clutches
- Basic spring length: 28.6 mm (1 1/8″) for 6″ (150 mm) clutches, 31.75 mm (1 1/4″) for 8″ (200 mm) clutches.
- Adjust so the clutch slips on overload.
- At 6 months, back off the springs to polish the discs.
- Re-tension clamp bolts after 8 hours of use, then every 40 hours.
Clamp bolt torque when fitting (all clutches)
| Pair of 1/2″ dia clamp bolts | 75 ft-lb |
|---|---|
| Pair of 5/8″ dia clamp bolts | 150 ft-lb |
| Single cotter clamp bolt | 100 ft-lb |
Loose bolts = stripped splines.
Clutches must be covered with an approved safety guard: AS8209 fits 6″ clutches, AS8409 fits 8″ clutches. Confirm HP rating and bore before ordering.