Brake pedal hard first thing in the morning

[BrianJ]

2006 T5 Kombi Beach

Once the engine started the brake pedal went back to being normal, but harder to press first time before engine started. I suddenly got the thought that the brake vacuum reservoir might have got a leak or one of the pipes, so I had a look around and got lucky straight away. The pipe that supplies vacuum from the tandem pump goes up to a disk looking valve with a smaller pipe that leads away to the bowels of the engine bay. The pipe from the other side of the disk valve to the brake booster had a huge crack where it went onto the valve end.

I replaced this entire plastic pipe which had become hard and brittle with a new rubber pipe from supercheap and problem solved.

[Rebuild]

same here a while back. Split at a t-piece to the brake servo, no vacuum assist.