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

Question

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

ociz · Answer

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

lukaszlublin · Answer

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.

kwok · Answer

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.

Hart3 · Answer

The reason may be the ABS pump, for this condition I have prepared connectors for test elimination from the system.

janczuro · Answer

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).

Staszek49 · Answer

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.

janczuro · Answer

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.

Megawe · Answer

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.

janczuro · Answer

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.

Soltysc11 · Answer

Hello. I with a similar problem, braking on a remote engine. After regenerating the terminals. Someone solved the problem?

Dawid_d153 · Answer

Hello, was the problem with the falling brake resolved?

jacZek · Answer

Hello. I also have such a problem after replacing the rear calipers. The brake goes down

sebek0614 · Answer

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

automister · Answer

Hello, have you managed to sort out the problem with the brake sticking?

kwok · Answer

Why bother fixing this problem? As long as the pedal is high when the engine is off, it’s fine. The only real solution is to bypass the ABS/ESP pump if it bothers you that the pedal sinks to the floor when the car is stationary. The important thing is that when you’re driving, it brakes effectively, and that’s all that matters. I used to drive a Renault where the pedal would drop when the car was stationary if you pressed it harder, and the braking was brilliant.

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

Why does the brake pedal on an Iveco Daily 35C15 sink to the floor while driving even after replacing the pump, pads/calipers and bleeding the system?

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Bypass ABS/ESP pump if pedal sinks stationary

Bypass ABS/ESP pump if pedal sinks stationary

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