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TurboDiesel2006 · Apr 27th, 2024, 11:04

Thank you for the suggestions.

Problem now fixed. After my last entry I decided to bite the bullet and ordered a new vacuum pump, in my case a Pierburg unit from Autodoc. It took a week to arrive but having fitted the new unit I checked the vacuum at each outlet and was now getting 22 inHg at the the engine mount (secondary) outlet. Previously the servo (primary) outlet was ok but the engine mount (secondary) was only 10 inHg. The brake pedal is now back to normal.

So to conclude if you have a hard brake pedal on your 2005-2007 Euro IV D5 with a manual gearbox (I think the auto box cars have an electric pump) check the vacuum at both outlets of the engine driven vacuum pump. Both should be more than 22 inHg. If they are not then it is probably time to replace the pump.

Apr 27th, 2024, 11:04	#6
TurboDiesel2006 V70 D5 185 Owner Last Online: May 12th, 2024 10:49 Join Date: Nov 2014 Location: Ipswich	Thank you for the suggestions. Problem now fixed. After my last entry I decided to bite the bullet and ordered a new vacuum pump, in my case a Pierburg unit from Autodoc. It took a week to arrive but having fitted the new unit I checked the vacuum at each outlet and was now getting 22 inHg at the the engine mount (secondary) outlet. Previously the servo (primary) outlet was ok but the engine mount (secondary) was only 10 inHg. The brake pedal is now back to normal. So to conclude if you have a hard brake pedal on your 2005-2007 Euro IV D5 with a manual gearbox (I think the auto box cars have an electric pump) check the vacuum at both outlets of the engine driven vacuum pump. Both should be more than 22 inHg. If they are not then it is probably time to replace the pump.