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:: Vezi subiect - Fiat Punto - Trepidat la franare

https://forum.problemefiat.ro/

Fiat Punto - Trepidat la franare
https://forum.problemefiat.ro/viewtopic.php?f=32&t=176
Pagina 1 din 2

Autor:  Radu [ Lun Aug 10, 2009 7:41 am ]
Subiectul mesajului:  Fiat Punto - Trepidat la franare

Salut,

De vreo cateva zile am observat un trepidat la franare cand merg cu viteza si franez. Ex: 100 km/h - 70km/h (posibil sa fie si la viteza mai mici dar nu asa de "violent").

Ce ar fi de stiut:
- acum 2-3 saptamani nu facea
- trepidatul nu e cel specific de ABS
- cauciucurile sunt noi (Michelin Energy Saver), ~ 4000 km
- jantele echilibrate cand s-au montat cauciucurile
- placutele de frana au aprox. 15.000 km (daca e nevoie pot fi mai precis) dar mai au material pe ele
- discurile de frana, intradevar, sunt cam tocite (foarte posibil sa fie de la ele)

Intrebari :) :

1. Cum pot verifica sa stiu sigur ca e de la discuri?
2. Cum pot verifica ca nu e de vina etrierul (vreun pistonas blocat, joc etrier)
3. E posibil sa se fi dezechilibrat vreo roata? (jantele sunt foarte bune si nu stiu sa fi luat vreo groapa)
4. Poate fi altceva? Ex. Cap de bara etc.


PS: La Ford am schimbat 2 seturi de discuri/placute in 4000 km pt. ca "desteptul" ala de mecanic nu s-a gandit niciodata ca ar fi de vina un etrier care se bleoca :(

Autor:  Florin [ Lun Aug 10, 2009 11:38 am ]
Subiectul mesajului:  Re: Fiat Punto - Trepidat la franare

Salut , cel mai bine se pot verifica pe un stand de frane ,cum sunt cele de la ITP . Se pune masina pe role se apasa frana fara a se bloca rotile si se urmareste ceasurile care trebuie sa urce egal ,daca se misca sus jos sunt ovalizate ,daca pleaca mai devreme la vreo roata atunci se poate sa fie si vrun pistonas gripat. Probabil discurile au si ceva uzura ,poate ai mai trecut si prin vreo baltoaca cand erau incinse si atunci se explica . Cel mai frecvent se intampla astfel de vivratii din cauza franelor sau anvelofelor .

Autor:  Radu [ Lun Aug 10, 2009 12:14 pm ]
Subiectul mesajului:  Re: Fiat Punto - Trepidat la franare


Autor:  Florin [ Lun Aug 10, 2009 1:10 pm ]
Subiectul mesajului:  Re: Fiat Punto - Trepidat la franare

Cred ca sau ovalizat discurile , la urcari si coborari franele sunt solicitate foarte mult si ajung la temperaturi foarte ridicate . Daca nu te grabesti o sa ne uitam cand ajungi pe la noi . In mod normal daca este gripat vreun pistonas atunci masina tinde sa ia o traiectorie spre stanga sau dreapta dupa caz . Insa daca ai ABS e greu pentru ca acesta blocheaza rotile in asa fel incat masina sa ruleze cat mai precis . Daca nu ai de lucru scoti roata fixezi o sarma ceva mai tare pe suportul de etrier sau pe amortizor asa incat varfu sa fie lipit pe disc ,dar fara sa stea presat pe el dupa care invarti discu de frana si vezi daca se abete de la comparatorul tau . E simplu :lol: .

Autor:  Radu [ Lun Aug 10, 2009 2:35 pm ]
Subiectul mesajului:  Re: Fiat Punto - Trepidat la franare

:))
Exact ca atunci cand imi centrez roata la bicicleta .. :)

Autor:  malin popescu [ Lun Aug 10, 2009 7:26 pm ]
Subiectul mesajului:  Re: Fiat Punto - Trepidat la franare

simti in pedala sau in volan?

Autor:  Radu [ Mar Aug 11, 2009 5:10 am ]
Subiectul mesajului:  Re: Fiat Punto - Trepidat la franare

Desi nu se simt tare le simt in pedala de frana

Autor:  Radu [ Mar Aug 11, 2009 7:44 pm ]
Subiectul mesajului:  Re: Fiat Punto - Trepidat la franare

Am mers acum cu ea pe DN1 si simptomele sunt urmatoarele:
- daca franez de la viteze mai mici de 110 km/h se simte foarte putin
- peste aceasta viteza (ex. 130 km/h) daca franez tremura simtitor
- tremuratul este peste tot :D Adica tremura toata masina (in nici un caz nu il simt mai pronuntat in volan)

Sper sa fie de la discuri pentru ca deja le-am comandat si nu de la o banala roata dezechilibrata

Dar care ar fi diferenta?
1. Daca se simte in volan ar fi o proiblema de directie?
2. Daca se simte in pedala e de la sistemul de franare?

Autor:  malin popescu [ Joi Aug 13, 2009 4:06 pm ]
Subiectul mesajului:  Re: Fiat Punto - Trepidat la franare

n-ai cumva depuneri de noroi pe jante?

Autor:  Radu [ Vin Aug 14, 2009 7:31 am ]
Subiectul mesajului:  Re: Fiat Punto - Trepidat la franare

Nu aveam noroi (a fost printre primele verificari) Am fost la service si am schimbat discuri si placute (atat discurile cat si placutele sunt marca ATE).

Florin a zis ca trepidatul venea intradevar de la discuri/placute. Problema era urmatoarea:

- am avut niste placute de frana mai mici care au lasat o margine de ~ 0,5 cm pe marginea exterioara a discului
- dupa care am schimbat placutele cu unele care "calcau" pe tot discul. Astfel placuta avea un sant pe ea cam de 1 mm

Ciudat e ca am mers ~15.000km cu ele fara probleme

Momentan, nici nu am mers cu viteza ca sa franez si nici nu am franat violent. Probabil ca weekendul asta am sa plec cu masina si voi veni cu detalii luni

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