BD and BDS installation, operation, maintenance

OVER-CENTRE CLUTCH UNITS Selection: Select the clutch unit taking into account the power and torque to be transmitted, maximum speed and radial load. BD units will require specific flywheel and housing sizes and BDS units must not be subjected to radial loads on the input shaft. Data required for selection is available in published literature and advice concerning service factors relating to specific applications should be obtained from the jbj Techniques Limited technical department, telephone: 01737 767493 or email: Installation: Type BD: Ensure that axial and radial alignment between clutch and engine are correct with satisfactory location of input shaft in pilot bearing. Before assembly check that the pilot bearing turns freely when fitted into flywheel recess. Type BDS: take care to mount the unit with shaft axis horizontal and on a common base with the prime mover. Good alignment between drive shaft and input shaft should be achieved in order to avoid axial and radial loads on the input shaft. When fitting the coupling to the input shaft, special care should be taken. The coupling should extend beyond the shaft end so that when it is secured with bolt and washer (A) it makes contact with shaft shoulder (B). Coupling bore tolerance of N8 is recommended. Note: Coupling should be fitted to the input shaft by using securing bolt as axial shock loads are not permitted. Operation: A) When disengaged, the clutch unit may be driven for extended periods. B) To engage, reduce engine speed to idle or tickover before engaging. Avoid slipping the clutch to bring the machinery up to operating rpm. After engagement increase engine rpm to operating speed. C) Before disengaging, reduce engine speed to idle to avoid snatch on drive plates. Maintenance: Lightly grease bearings and cross shaft every 300 hours and on BD1100-BD3500 and BDS2200 units grease release bearing every 100 hours. Use high quality density 2 grease such as BP ENERGREASE LSEP2. DO NOT OVER-GREASE. Your jbj clutch is a quality unit with self adjustment capability to compensate for moderate wear. However after considerable usage manual adjustment will be necessary. Ensure that the clutch is adjusted correctly. If the lever requires a little effort to engage or if the clutch begins to slip, adjust immediately as follows: To adjust the clutch: set the lever in the release position. Remove the inspection cover (8) and rotate clutch until the spring loaded pin (49) becomes accessible. Depress the lock pin and turn the adjuster ring (36) clockwise to the next groove. Move the lever to engage clutch, if only slight resistance is felt return lever to release and repeat adjustment procedure. If the clutch is over adjusted the lever will be excessively