Technical hard brake pedal

[D139903Q]

I have a 1997 1.7 diesel have just changed the brake servo due to a air leak. now the brake pedal is very hard to push down, any help to the problem please.

 

[Peter Pick-Up]

Did you use the same brand brake booster?

 

[D139903Q]

just changed the brake servo did not renew anything else.Had it fitted at a local garage. Servo from a car dismantlers came off a 1.7 diesel.

 

[Peter Pick-Up]

My guess: the servo is not working at all....!! ( they do fail once in a while).
Mine failed a few years ago, ( the same hard pedal you mentioned, and very few braking effect) after I changed the brake fluid and bleed the system...
I bought a new one from Fiat, was very expensive, but the brakes are perfect ever since.