Pozdravljeni
Sem v dvomih glede delovanja zadnjih zavor pri jeepu. Namreč ko se po makadamu zaletim z neko brzino in na šusn pritisnem pedal zavor do konca mi zablokirajo samo prvi dve kolesi, zadnji pa ne. Avto sem doma dvignil zadaj, pregledal cilindre v bobnih, tudi lepo odmika obloge, zgleda vse ok. Potem sem dvignjen avto dal v 1.prestavo in zaviral z zavoro, ne prime skoraj nič. Če potegnem ročno avto prime tako da ugasne. Ima kdo kako idejo kaj bi lahko bilo? Mislim da xj l.96 nima ventila, ki bi reguliral moč zadaj glede na težo, vsaj videti ga ni.
Zadnje zavore cherokee xj
Combination valve sections
Metering Valve
The metering valve section of the combination valve is required on cars that have disc brakes on the front wheels and drum brakes on the rear wheels. If you have read How Disc Brakes Works and How Drum Brakes Work, you know that the disc brake pad is normally in contact with the disc, while the drum brake shoes are normally pulled away from the drum. Because of this, the disc brakes are in a position to engage before the drum brakes when you push the brake pedal down.
The metering valve compensates for this, making the drum brakes engage just before the disc brakes. The metering valve does not allow any pressure to the disc brakes until a threshold pressure has been reached. The threshold pressure is low compared to the maximum pressure in the braking system, so the drum brakes just barely engage before the disc brakes kick in.
Having the rear brakes engage before the front brakes provides a lot more stability during braking. Applying the rear brakes first helps keep the car in a straight line, much like the rudder helps a plane fly in straight line.
Pressure Differential Switch
The pressure differential valve is the device that alerts you if you have a leak in one of your brake circuits. The valve contains a specially shaped piston in the middle of a cylinder. Each side of the piston is exposed to the pressure in one of the two brake circuits. As long as the pressure in both circuits is the same, the piston will stay centered in its cylinder. But if one side develops a leak, the pressure will drop in that circuit, forcing the piston off-center. This closes a switch, which turns on a light in the instrument panel of the car. The wires for this switch are visible in the picture above.
Proportioning Valve
The proportioning valve reduces the pressure to the rear brakes. Regardless of what type of brakes a car has, the rear brakes require less force than the front brakes.
The amount of brake force that can be applied to a wheel without locking it depends on the amount of weight on the wheel. More weight means more brake force can be applied. If you have ever slammed on your brakes, you know that an abrupt stop makes your car lean forward. The front gets lower and the back gets higher. This is because a lot of weight is transferred to the front of the car when you stop. Also, most cars have more weight over the front wheels to start with because that is where the engine is located.
If equal braking force were applied at all four wheels during a stop, the rear wheels would lock up before the front wheels. The proportioning valve only lets a certain portion of the pressure through to the rear wheels so that the front wheels apply more braking force. If the proportioning valve were set to 70 percent and the brake pressure were 1,000 pounds per square inch (psi) for the front brakes, the rear brakes would get 700 psi.
Če prav razumem, kar sem našel so potem zavore naštimane prav?!
Olje pride,cilindrčki delajo super, vse lepo podmazano, nikjer ne napihuje cevi, pedal ko tiščiš se nič ne pogreza.
Če je res, da zadnji del prime samo 30% potem bo to to.
Ročna prime odlično.
Kaj pa na tehničnem?
Metering Valve
The metering valve section of the combination valve is required on cars that have disc brakes on the front wheels and drum brakes on the rear wheels. If you have read How Disc Brakes Works and How Drum Brakes Work, you know that the disc brake pad is normally in contact with the disc, while the drum brake shoes are normally pulled away from the drum. Because of this, the disc brakes are in a position to engage before the drum brakes when you push the brake pedal down.
The metering valve compensates for this, making the drum brakes engage just before the disc brakes. The metering valve does not allow any pressure to the disc brakes until a threshold pressure has been reached. The threshold pressure is low compared to the maximum pressure in the braking system, so the drum brakes just barely engage before the disc brakes kick in.
Having the rear brakes engage before the front brakes provides a lot more stability during braking. Applying the rear brakes first helps keep the car in a straight line, much like the rudder helps a plane fly in straight line.
Pressure Differential Switch
The pressure differential valve is the device that alerts you if you have a leak in one of your brake circuits. The valve contains a specially shaped piston in the middle of a cylinder. Each side of the piston is exposed to the pressure in one of the two brake circuits. As long as the pressure in both circuits is the same, the piston will stay centered in its cylinder. But if one side develops a leak, the pressure will drop in that circuit, forcing the piston off-center. This closes a switch, which turns on a light in the instrument panel of the car. The wires for this switch are visible in the picture above.
Proportioning Valve
The proportioning valve reduces the pressure to the rear brakes. Regardless of what type of brakes a car has, the rear brakes require less force than the front brakes.
The amount of brake force that can be applied to a wheel without locking it depends on the amount of weight on the wheel. More weight means more brake force can be applied. If you have ever slammed on your brakes, you know that an abrupt stop makes your car lean forward. The front gets lower and the back gets higher. This is because a lot of weight is transferred to the front of the car when you stop. Also, most cars have more weight over the front wheels to start with because that is where the engine is located.
If equal braking force were applied at all four wheels during a stop, the rear wheels would lock up before the front wheels. The proportioning valve only lets a certain portion of the pressure through to the rear wheels so that the front wheels apply more braking force. If the proportioning valve were set to 70 percent and the brake pressure were 1,000 pounds per square inch (psi) for the front brakes, the rear brakes would get 700 psi.
Če prav razumem, kar sem našel so potem zavore naštimane prav?!
Olje pride,cilindrčki delajo super, vse lepo podmazano, nikjer ne napihuje cevi, pedal ko tiščiš se nič ne pogreza.
Če je res, da zadnji del prime samo 30% potem bo to to.
Ročna prime odlično.
Kaj pa na tehničnem?
tejo179 napisal/-a:Evo, bil pri mehaniku. Zadnje zavore primejo le 30%, tako je prav in mora bit tako. Sistem pa deluje točno tako kot je napisano v prejšnjem postu v angleščini.
Meni primejo 100%
Sicer se je treba mal navadit delat potem z nožno....ampak mi je všeč, ker pri kakem strmem vzratnem spustu avto dejansko obstoji....prej pa se je premikal kljub blokiranim prednjim kolesom.Vrni se na “Avtomobili in oprema”
Kdo je na strani
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