Bisbee daily review., 1921-03-13
TROUBLE CURES, TOPIC
 IF PAPER

In recent prize-winning article on Cures for Clutch Trouble" G. A. Luers. of Washington, D. C.. wrote:
 ''The purpose of the friction clutch is to impart the power of the engine gradually to the driven part without injurious shock to the mechanism.
 When the clutch engaging mech anism and the surfaces for frictional contact are in proper operating con, dition, a steadily increasing friction al adhesion will transmit the engine torque without perceptible jerking or thrust when the clutch is engaged.
 Clutch defects are revealed in sey- eral ways and these difficulties are either fierce engagement, grabbing ot the clutch; slipping, which is failure of the contact surfaces to engage as they should; or spinning which is continued revolving of the clutch cone when disengaged which makes it dif- ficult to shift the gears of the trans, mission.
 Where the clutch grabs it is evi- dence that the contact surfaces are brought into too rapid engagement and is caused by either loosenesS in the joints and fulcrums of the clutch release linkageS excessive tension on the clutch spring or the improper condition of the frictional surfaces.
 With the metal plate clutches the lack of oil may have roughened the faces and quick engagement of the surfaces will resBit,
 Cauee of Grabbing
 hard and ,.nnpln laathpr nrt a cone clutch is lsually the cause or grabbing.
 Slipping of the metal disc clutch, too heavy a lubricant or the clutch pedal linkage might prevent the clutch plates from engaging.
 Accommodations Of oil and grease on the leather of a cone clutch will keep the faces of the coupling apart and cause slipping.
 Clutch spinning is often due to eX- cessive friction in the spring thrust bearing, though sometimes faulty alignment of the flywheel and clutch cone prevent the engaging surfaces from entirely clearing each other. \ bent clutch shaft might be the cause ot this.
 sometimes the fault lies in the clutch. a heavy rim or cone will store up energy and continue to revOlve when disengaged.
 The amount of movement between the surfaces of clutch is small and it is important that no looseneSs in the pedal connections or bending of the levers should exist to prevent gradual engagement.
 Excessive tension or the clutch 1, S0pqT,iG{S, 0pq 4i{,. may cause the clutch 10 grab should be enough to keep the clutch i in gagement under the maximum power of the engine; in other worrs to hold without slipping on the steep est grad as a test that the car Will negotiate.
 ! Multiple disc clutches should bt operated in an oil of the proper con sistency. Oil of too thin a body vii allow the plates to grip fiercely witt the probable abrading of their sur ! faces.
 Oils For Dressings Neatsfoot and castor oils are usec as dressings for cone clutches tC prevent the leather from becoming hard and dry.
 'Where grease or oil leakage cause; l a cone clutch to slip, chalk or tale ,, dusted or sprinkled over the SurfacC ! will absorb the grease. Clutches O ! the cone type are sometimes fount i with a ridge at the rear edge of the i leather. This will prevent the Clutcl | from seating. causing it to slip. Witt | a file or rasp remove the ridge unti flush with the surface.
 i When a clutch spins from lack o alignment or adjustment the remed! is obvious, but if the fault is in th' design d retarding brake should eithe be fitted or the clutch rim liShtcne' by drilling or machining away meta at Or near the outer circumference
 If it is desired to attach a brakt or dampener to check the revolving o the cone, either cork or rubber can b. fitted into d metal bracked and thi bracket attached to the car frame.
 "The position of the brake shoul' be just to the rear of the clutch rin