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Iveco Daily 35C15 Catching Brake Issue: Falling Brake, New Pump & Blocks, Servo, ABS System

lukaszlublin 20037 13
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  • #1 16413343
    lukaszlublin
    Level 2  
    Hello forum members,

    The topic has already been raised several times but not resolved.
    Problem in the falling brake on Iveco. When braking by car, the brake goes all the way to the floor.
    At a standstill, it hardens several times under the pumped one. Everything looks like it's OK.

    -new blocks
    -new terminals
    -new pump
    - servo working
    -tight cables
    - 100% vented system
    -no errors on the computer regarding the ABS pump
    - ABS functional
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  • #2 16413570
    ociz
    VIP Meritorious for electroda.pl  
    lukaszlublin wrote:
    -new terminals

    Which? The rear are falling apart, especially after unskilled handling. Check the effectiveness of the handbrake.
  • #3 16414216
    lukaszlublin
    Level 2  
    ociz wrote:
    lukaszlublin wrote:
    -new terminals

    Which? The rear are falling apart, especially after unskilled handling. Check the effectiveness of the handbrake.



    The car brakes while driving, but the brake takes too low and it is hard to brake with increased load weight.
    The handbrake works fine.
  • #4 16414273
    kwok
    Level 40  
    There is no air and nowhere is leaking and the pedal falls in, i.e. the pump passes and there will be no other reason. Buy ori pump, pour branded liquid and not no name from the station (I use Organika successfully) and the problem should disappear for a long time. LPR iveco pump substitutes are often broken from the news or fall after a week.
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  • #5 16414922
    Hart3
    Level 26  
    The reason may be the ABS pump, for this condition I have prepared connectors for test elimination from the system.
  • #6 17188441
    janczuro
    Level 11  
    Hello. Did your friend solve a problem with the brake pedal? I have the same Iveco 35C15 from 2010. Brake discs and pads have been replaced, rear calipers after regeneration, manual functional. The system is 100% vented. I checked the brake pump so it also falls off. I wonder if the ABS pump can be this reason (abs is good).
  • #7 17188515
    Staszek49
    Level 35  
    Gentlemen, before replacing the brake pads, etc., the ABS pump was operational, because if so, the brakes were not properly bled.
    The braking system with ABS requires a slightly different way of bleeding - the forum contains detailed descriptions and videos.
  • #8 17189861
    janczuro
    Level 11  
    Staszek49 wrote:
    Gentlemen, before replacing the brake pads, etc., the ABS pump was operational, because if so, the brakes were not properly bled.
    The braking system with ABS requires a slightly different way of bleeding - the forum contains detailed descriptions and videos.

    For me, ABS normally switched on in winter. I have had this problem with the brake since I bought the car, i.e. for about a year, but before the repair the brake, despite the fact that it was quite effective. And now it is much weaker, the car traveled about 1000 km so the blocks should have already reached. I vented the system in several ways, the pedal does not just grow soft and falls into the floor as if the master cylinder is not efficient enough. I wonder if it is possible that the ABS pump is so airy that no way of venting by pressing the brake pedal it will not be effective but connecting the venting pump can help.
  • #9 17190003
    Megawe
    Level 34  
    You can check the clearance between the pump and the stem in the servo. The pump diameter is important because they can be 25.04 mm or 28.58 mm. If there is a brake power corrector in the system, it can also cause that the pedal will be as low as the "pig tails" on these copper wires. The brakes can be bled without leaking the system. Unscrew the caliper, press the brake pedal several times so that the piston extends, set the caliper so that the fluid inlet is on top and quickly press the piston. We do this several times, the second person can check if the fluid with air is returning in the tank. It's a good idea to apply special brake cylinder grease.
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  • #10 17190167
    janczuro
    Level 11  
    Megawe wrote:
    You can check the clearance between the pump and the stem in the servo. The pump diameter is important because they can be 25.04 mm or 28.58 mm. If there is a brake power corrector in the system, it can also cause that the pedal will be as low as the "pig tails" on these copper wires. The brakes can be bled without leaking the system. Unscrew the caliper, press the brake pedal several times so that the piston extends, set the caliper so that the fluid inlet is on top and quickly press the piston. We do this several times, the second person can check if the fluid with air is returning in the tank. It's a good idea to apply special brake cylinder grease.

    Thank you for your answer. Can a colleague write if the dimensions of the diameter of the master cylinder which he gave are the dimensions of the piston or the whole pump. Because maybe my car has the wrong master cylinder. The car had a replaced cabin and the pump probably came from this cabin. with pushing the piston, I did so with the rear calipers (Brembo with handbrake) with the difference that the rear calipers are screwed in and I unscrewed the vent when screwing in. I had them disassembled (replacing the rubber bands) and after folding and filling with the liquid, there is always air in them somewhere so I vented them. Of course, the vented system was also a traditional method.
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  • #11 17909542
    Soltysc11
    Level 2  
    Hello. I with a similar problem, braking on a remote engine. After regenerating the terminals. Someone solved the problem?
  • #12 19290934
    Dawid_d153
    Level 6  
    Hello, was the problem with the falling brake resolved?
  • #13 19457516
    jacZek
    Level 14  
    Hello. I also have such a problem after replacing the rear calipers. The brake goes down
  • #14 19640155
    sebek0614
    Level 2  
    Hello, can anyone share information on how to deal with the brakes because I have no idea anymore. I have already spent many hours on this car, two workshops have been lost, including ASO and the car still does not brake as it should
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Topic summary

The discussion revolves around a persistent issue with the braking system of the Iveco Daily 35C15, where the brake pedal falls to the floor during operation. Despite replacing various components such as brake blocks, terminals, and the pump, and ensuring the ABS system is functional and the brake system is vented, the problem remains unresolved. Participants suggest potential causes including the ABS pump, improper bleeding techniques, and the possibility of using non-original parts. Recommendations include using a branded brake fluid, checking the master cylinder dimensions, and ensuring proper bleeding methods specific to ABS systems. Several users report similar experiences, indicating a common issue among this model.
Summary generated by the language model.
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