BMW Service Bulletin Archive

clutch-complaints-270-295-supplement-1270

( SERVIINCFEO RMATION Teohn.Cu โ–  t.Scrvice YKT 20 fm/cb/ca Motor cycle R50/5,R60/5,R75/5 Groups Tranโ– โ–  i โ–  eion Munich, Dec.2nd 70 po. 2/70 (295) โ€ข Bet.a Clutch Coโ– plaiat. โ–  Dear Sirs, aa main reason fOr the elutch knock=lika E~l~โ€ขโ€ขโ€ขโ€ขโ€ขt of the clutch which got known in varioue aa โ–  ea, ia dae to a too lar1e axial clearance of the aaim drive11haft of the t.ran โ– = 111is11loni n con.oie~tic:m with the a1uยท.r1d,l111J:oi!fi l th<5 d:rยทi-ve โ€ขhaft, formed by fretting corrosion, As a remedy adJuat trau โ– โ–  iaaion main drive โ€ขhaft corrdctl7J the 1iTen axial clearance ia O + 0,1 mm - clean the serration and lubricate slightly with Molykote-, graphite or BD bearin1 lubricant. To be sure also c4eck whether ath the enr;tne aide t.be tranaai. โ– โ–  ioa houain1 ia in order. (transmission abaft) A knock=like clutch ea1a1ement cu also reault from the fact that the pressure rod,ordering Noa 2] 211230106,in tbe pide drilliac of the pres โ– ure body,orderina No. 23 21 1 230 107, of the pressure bearing (ball cage with balls)orderi111 Ho .. 2ยทJ 21 1 2:,0 961, e.1e the centering of the pre โ–  aare,ordering Ho .. 23 21 1 251 801, aeiโ€ขโ€ขโ€ขโ€ข Reme~ys 1. Remove transmission according to shop manual article 23 00 020 2. Di โ– mount pressure rod, preaave piston and prea โ– are beariaa and check for seiae areas. J. Remove minor seize marks on the pressure rod with emery paper. At big damage renew defective parts. The guide drilling-in pressure piston should have a diameter of 6.2 H9 mm; if necessary take care for a 0.2 mm clearance of the pressure rod in the pressure piston. ยทtt you renew the pressure bearing, control the outer diameter (22t7 h 11 mm). . 4. Installation should be in the opposite procedure. By insertio of the pressure piston the oil seal should not be turned backwards. - 2 - Kenntnls genommen โ€ข Pris connalssance - Noted - Tomado nota - Preso conoscenza Beltiebsleitur,g Direction Management nrrr-i,::cit.in Werkstatt Atelier workshop Toller KD-Anoohme Gew11hrl.-Sachb. E-Teildienst R~ceptlon client6Ie lnspecIeur garanlle Service pi6ces d6tach6es Cust. recepllon Warranty inspector Spare parts service ~eceoci6n clienlela lnsaeclor aamntlo Servicโ€ขo de recamblos Ablage - Archives โ€ข Fire - Atehlvo Belrlebsleitung Direction MonogemenI 0irecci6n werks1011 Atelier workshop Tolleโ€ข No. 2/70 (295) e โ€ข 2 - The serration should be slightly greased with Kolykote, 'graphite or HD lubricant. Remarks It is recollllD.ended to removt' the t.ransmission for this repair work, because theppressure rod can be inserted from the clutch aide and the felt seal, ordering No. 2j 21 1 230 41tO, will not be damaged at all.with this repair method. Before mounting the felt seal, rinse with grease for hot bearings. With these two repair methods all cases of knock-like clutch engagement have been repaired. Other sources of clutch complaints and repairs are to be done as follows 1 1. Clutch difficult to operate 1.1. At half pulled hand brakP lbc rlutab release bearing should be rectangular to the transmission axle. 1.2 Dry mechanically operated elements. Hand lever, cable line, release lever and all friction areas should be lubricated. 2. Clutch slipping 2.1. Hot enough clearance. Given release lever clearance of 2 mm to be adjusted, 2.2. At R75/5 cup spring of the R50/5 or R60/5 was installed. Indicated cup "!J'ing should be installed. 2.J. Preยทssure ring deformed or pressure plate worn out. Replace worn out parts. Very truly yours BAYEnISCHEM OTORENW ERKE Akt1engesellschaft ppa. r--ยท~.- \.ยท'" '~,.'ยท .- 1te 11es1ie ) ./ _\ I >:;II I Bennewitz$ (

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