Flange mounted clutches do not have a field bearing and therefore the field has to mount directly on the face of the engine. Please make sure that the engine bearing bore and bolt hole locations are compatible with our clutch field. In these types of applications, an inboard ground drive pulley cannot be used. In general, field mounted clutches are not as flexible as bearing mounted clutches and with the cost of installation time, they are not as widely used.
The assembly consists of four separate items. They are the:
field Provides magnetic flux for engagement
Rotor Connected to the engine shaft and is the input to the clutch
Armature/pulley Is the output of the clutch
Brake shroud assembly Assists in slowing the mower blades to a stop
Mount the field on the engine. Pilots on the back of the field line up and locate on the bearing bore on the engine block. Once this pilot is slid into the bearing bore, the four bolts to hold the field onto the engine face should be installed and tightened. (Torque to be determined by bolt used and engine thread size.)
Place the key (customer supplied) into the shaft keyway. Slide the rotor onto the shaft. The rotor should be slid back all the way until it contacts the step on the engine shaft. If no contact is made or the rotor can slide all the way until it contacts the field, there is a problem in using this clutch. You need to adjust installation at this point by putting some type of spacer between the engine shaft step and the clutch rotor. Please refer to individual clutch drawing for this dimension.
Slide the pulley/armature onto the shaft. This should fit flush against the rotor face. Depending upon clutch style, there may or may not be a keyway underneath this area. (If there is no keyway underneath this area, make sure your key does not extend into this piece.)
The center bolt and washer is then installed to keep the entire assembly together. The center bolt should be tightened down to the bolt manufacturer recommendations. Usually 20-50 lb. ft. of torque is required. Please make sure that the washer contacts the inner race of the bearing. The washer can extend beyond the inner race as long as it does not contact the outer race because the seal is recessed. Please make sure the washer is not cupped in the direction of the seal or the seal will be damaged.
The springs and the brake shroud are then placed on the units and the gap adjustment nuts are loosely tightened down.