Ogden Standard-Examiner | 1926-04-04 | Page 12 | Study Cause of Squeaky Brakes

I STUDY STUDY CAUSE OF SQUEAKY BRAKES Test Tests show that brake squealing I is caused caud by the scratching of the tho brake brak drum by brass brus bra wIre In Inthe inthe Inthe the brake brak lining high rivet heads head particles of ot steel teel from the drums or grit frit from the th road which set et setup setup up vibrations vibration In the th drum Dr F FC C Stanley chIef engineer of ot the Co told engineers at atthe atthe the annual meeting ot or the th So So- So Society So ot of o Automotive Engineers The Tho note not gIven out by tile the vibrations vibrations tlona Is of ot the th same Ime tone ton as the ringIng ringIng- note noto not produced by striking the drum with a a hammer The Th sound Bound can be damped or muffled by applying slight alight pressure pressur to the drum at a point directly opposite the cause caus of or the tho th vibration JL STEEL Preventive measures that can be taken by the th manufacturer are areto areto arto to make mak the th drums drum of harder barder carbon high carbon steel lUring assuring a true circularity ot of o the th brake bands and sinking the rivet heads one one- sixteenth one sixteenth of ot an Inch below bow the surface ot of the th brake linIng It If these measures are taken said Pr Dr Stanle Stanley the th adjustment of the brakes brake toIve to give dve uniform clear clear- clearance clear clear-anc ance of ol the lining from the drum drums drumst at t all points point wilt will result In quiet brakes brake Various methods of ot overcoming squealing brakes brake In the th station were described by the speaker B who said laId ald that In the tho th cue case of badly worn drums on used cars care carea cara L a very successful remedy iv h 1 the Insertion of ot thin metal shims under un- un under un under der the lining between the th riv- riv rivet riv-els riv et eta The Th ur use of ot an oily or greasy lubricant Is dangerous and often orten leads to the th violent nt seizing of the tho brakes and serious damage to the car ar such as a a broken axle sheared rivets or stripped gear gears The only lubricant that should be used In any case cas Is I dry pow pow- powdered powdered dered graphite which will not collect dirt dirt and anil oven this Is a makeshift I M I I tenth NIne of ot the brake job jobs that come corn to the th servIce station are found to have hav no free tree move move- movement move ment at the external rear anchor support of ot the th brake This must he be eased used up to permit the th lining lininI to make mak contact with the tho In drum at the th rear so 10 that It will act as asa asa a damper to vibrations caused by hard particles at the thi forward area ot of high pressure AJI All foreign matter malter should be removed from between the th drum and lining and It the h drum Is scored leered It should hould be b smoothed with fine CIne emery cloth It th the band Ls is not per perfectly circular and concentrIC with the drum It should be b ham ham- merd Into conformity with the drum The Th perfection of ot the rounding of ol the band can an be b test test- tested test tested ed by applyIng the th brake brak and trying to Insert a thin feeler gage lalO a between the th lining and drum to find a place where the lining lining falls taUs to grip rip the gage cace