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> Intrebare despre prezoane
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florin83
post Apr 10 2006, 10:11 PM
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Am auzit la cineva ca prezoanele se autostrang in mers.. este adevarat?
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cristic
post Apr 10 2006, 10:35 PM
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florine de ce nu incerci tu? :unibrow:
desfa prezoanele si mergi cu masina ... asa sigur o sa vezi daca e adevarat sau nu tongue.gif


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SUPERBEC
post Apr 10 2006, 10:35 PM
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desfa cateva si vezi ce se intimpla biggrin.gif biggrin.gif biggrin.gif


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316i
post Apr 10 2006, 11:42 PM
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Raspunsul cel mai simplu la obiect e "da".


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io'sŪ
post Apr 11 2006, 12:32 AM
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pe dracu !


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Viper05
post Apr 11 2006, 01:53 AM
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nu e adevarat,daca nu sunt stranse calumea se desfac
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316i
post Apr 11 2006, 02:03 AM
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Si atunci cum se explica fenomenul ca ca dupa ce mergi o vreme (o luna, doua, trei) prezoanele sunt stranse mai tare decat atunci cand le-ai strans cand ai pus rotile?
Cred ca ar fi mai frumos sa se dea si explicatii de ce "nu".


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Robert
post Apr 11 2006, 06:10 AM
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Putin off-subiect: in functie de unghiurile geometriei rotii (atunci cand unghiurile de cadere, si/sau convergenta sunt pozitive) rezulta o componenta transversala a fortei care impinge roata catre butuc, in timpul mersului in linie dreapta, astfel incat prezoanele sunt partial descarcate de tensiune.
Evident, nu e valabil si pentru roata exterioara, atunci cand intri in curbe.

Faptul ca:
QUOTE
dupa ce mergi o vreme (o luna, doua, trei) prezoanele sunt stranse mai tare decat atunci cand le-ai strans cand ai pus rotile
cred ca poate fi explicat numai prin ceea ce se intampla in timp la nivelul filetului prezoanelor, precum si a zonei de contact prezon - janta. In principiu, oxidare: la prezoane patrunde usor apa; dre asemenea, ele sunt supuse la cicluri repetate incalzire / recire, din cauza franelor.
In plus cred (aici e doar o teorie) ca "geometria" filetului de prezoane nu este aleasa intamplator.
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Sorin
post Apr 11 2006, 06:27 AM
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am uitat sa strang eu niste prezoane si s-au desfacut asa ca va rog nu incercati sa aflati cum va poate cadea masina


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Robert
post Apr 11 2006, 07:45 AM
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QUOTE (Robert)
cred ca poate fi explicat numai prin ceea ce se intampla in timp la nivelul filetului prezoanelor
Nu stiu daca am fost clar: ma refer la faptul ca se desfac mai greu, care nu inseamna in nici un caz ca s-au mai strans (tensiunea in prezon e mai mare), ci ca forta (cuplul) necesar desfacerii creste din cauza frecarilor mai mari.
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SUPERBEC
post Apr 11 2006, 11:03 AM
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da mai bine facem un test cu un anume 316 biggrin.gif


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Sorin
post Apr 11 2006, 11:19 AM
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poate facem un test pe niste inele biggrin.gif s-o comporta altfel?


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paul
post Apr 11 2006, 10:51 PM
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QUOTE (florin83)
Am auzit la cineva ca prezoanele se autostrang in mers.. este adevarat?


Cred ca se poate spune "Myth bustered" ! smile.gif
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316i
post Apr 11 2006, 11:41 PM
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QUOTE (SUPERBEC)
da mai bine facem un test cu un anume 316 biggrin.gif

Eu zic sa te tii bine de inelele alea sa nu-ti sara din mana cand trec pe langa tine.
Si P.S.: n-o sa mai fie 316 multa vreme. :finga:


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io'sŪ
post Apr 11 2006, 11:44 PM
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QUOTE (316i)
Si P.S.: n-o sa mai fie 316 multa vreme.  :finga:

adika??? :unibrow:


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alex230ro
post Apr 12 2006, 09:34 AM
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QUOTE (316i)
QUOTE (SUPERBEC)
da mai bine facem un test cu un anume 316 biggrin.gif

Eu zic sa te tii bine de inelele alea sa nu-ti sara din mana cand trec pe langa tine.
Si P.S.: n-o sa mai fie 316 multa vreme. :finga:

Te asteptam :unibrow: biggrin.gif
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SUPERBEC
post Apr 12 2006, 12:12 PM
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te lasa mamica sa ii schimbi motoru? biggrin.gif


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316i
post Apr 12 2006, 06:00 PM
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Da draga bek, nu numai ca ma lasa dar imi da si bani de el. :finger:


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316i
post Apr 12 2006, 06:04 PM
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QUOTE (jaffar)
QUOTE (316i)
Si P.S.: n-o sa mai fie 316 multa vreme.  :finga:


de ce tinere, ti-e rusine cu el ? smile.gif


Nu mi-e rusine deloc cu el, dar caroseria aia merita ceva mai bun. biggrin.gif


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florin83
post May 5 2006, 08:28 PM
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deci eu sunt in stare sa pun pariu ca se strang singure...
m-am chinuit azi cred ca juma de ora sa desfac o roata.. alex poate sa confirme ca a fost m-a ajutat..
si la autosoft cand am fost sa mi le schimb au avut aia o problema cu cateva prezoane ca nu s-au desfacut cu pistolul si nici la mana cu cheia.. a fost nevoie de o ranga pe care a bagat-o pe cheie ca sa le desfaca..
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