V50 Brakes : - pedal going to floor

gbartling · Nov 24th, 2017, 16:02

hi all, ive got a 2010 v50 1.6d DRIVe and the brake pedal goes to the floor, if it is pumped it goes ok and brakes work but if you wait 10 seconds the pedal will go to the floor again with very little braking. if the engine is not running brake pedal will stay hard after a few pumps but as soon as the engine is started the brakes fail. is this most likely to be the master cylinder the vacuum pump or something else. i cant find anyone selling brand new genuine master cylinders and the pattern ones are not cheap so don't want to change it if it's ok. is there a way of testing the vacuum pump? have done a search of the forum and am leaning towards a vac problem but would appreciate any help.

Gary

StatusRed · Nov 24th, 2017, 16:03

Sounds like the vaccum to me, but I'm no expert.

gbartling · Dec 7th, 2017, 13:05

ok checked all vacuum pipes and ok, vacuum pump seems ok also so bought a master cylinder from scrap yard and tried to fit that but not getting any fluid out from calipers. do the master cylinders need to be primed? if so how is it done, i put brake fluid in reservoir and let it come out of where the brake pipes screw in, attached a vacuum bleeder to rear right brake caliper but when bleed nipple is opened no fluid comes out. now i have no brakes! help.

gary

StatusRed · Dec 7th, 2017, 17:24

Quote:

Originally Posted by gbartling

ok checked all vacuum pipes and ok, vacuum pump seems ok also so bought a master cylinder from scrap yard and tried to fit that but not getting any fluid out from calipers. do the master cylinders need to be primed? if so how is it done, i put brake fluid in reservoir and let it come out of where the brake pipes screw in, attached a vacuum bleeder to rear right brake caliper but when bleed nipple is opened no fluid comes out. now i have no brakes! help.

gary

I haven't done anything as involved as changing the master cylinder so I wouldn't know.

I've bled the brakes twice and the clutch once - used a one man (eesibleed) kit with no issues both times.

gbartling · Dec 7th, 2017, 18:42

managed to get some fluid through but still not as much as i expected to, now brakes rock hard but not stopping the car. going to take it to my brothers garage tomorrow and see if he has any more luck than me.

gary

gbartling · Dec 13th, 2017, 12:54

fixed!! problem with hard brakes was rubber gasket on new master cylinder missing, replaced with one from old unit and ok. bled system through with new fluid and using a pressurized bleeder instead of my vacuum one and everything is now ok. never got an answer from volvo dealer in Warrington about new master cylinder and all the new ones online are different to the original, does anybody know where i can get an original new one as i'd prefer a new one to the used one i fitted specially now iv'e proved the master was to blame.

Gary

StatusRed · Dec 13th, 2017, 19:24

Ask these guys maybe: https://www.volvoforums.org.uk/showthread.php?t=57125

Nov 24th, 2017, 16:02	#1
gbartling Junior Member Last Online: Sep 12th, 2022 10:57 Join Date: Nov 2004 Location: Liverpool	pedal going to floor hi all, ive got a 2010 v50 1.6d DRIVe and the brake pedal goes to the floor, if it is pumped it goes ok and brakes work but if you wait 10 seconds the pedal will go to the floor again with very little braking. if the engine is not running brake pedal will stay hard after a few pumps but as soon as the engine is started the brakes fail. is this most likely to be the master cylinder the vacuum pump or something else. i cant find anyone selling brand new genuine master cylinders and the pattern ones are not cheap so don't want to change it if it's ok. is there a way of testing the vacuum pump? have done a search of the forum and am leaning towards a vac problem but would appreciate any help. Gary

Nov 24th, 2017, 16:03	#2
StatusRed Premier Member Last Online: Yesterday 19:28 Join Date: Jul 2015 Location: Glasgow	Sounds like the vaccum to me, but I'm no expert. __________________ 2009 S40 SE Lux 2.0i \| 2022 Suzuki V-Strom 650 \| 2002 Audi TT 225 Previous: C70 Coupe 2.4i \| Saab 9-5 Aero \| Daihatsu SporTrak

Dec 13th, 2017, 19:24	#7
StatusRed Premier Member Last Online: Yesterday 19:28 Join Date: Jul 2015 Location: Glasgow	Ask these guys maybe: https://www.volvoforums.org.uk/showthread.php?t=57125 __________________ 2009 S40 SE Lux 2.0i \| 2022 Suzuki V-Strom 650 \| 2002 Audi TT 225 Previous: C70 Coupe 2.4i \| Saab 9-5 Aero \| Daihatsu SporTrak

Dec 7th, 2017, 13:05	#3
gbartling Junior Member Last Online: Sep 12th, 2022 10:57 Join Date: Nov 2004 Location: Liverpool	ok checked all vacuum pipes and ok, vacuum pump seems ok also so bought a master cylinder from scrap yard and tried to fit that but not getting any fluid out from calipers. do the master cylinders need to be primed? if so how is it done, i put brake fluid in reservoir and let it come out of where the brake pipes screw in, attached a vacuum bleeder to rear right brake caliper but when bleed nipple is opened no fluid comes out. now i have no brakes! help. gary

Dec 7th, 2017, 18:42	#5
gbartling Junior Member Last Online: Sep 12th, 2022 10:57 Join Date: Nov 2004 Location: Liverpool	managed to get some fluid through but still not as much as i expected to, now brakes rock hard but not stopping the car. going to take it to my brothers garage tomorrow and see if he has any more luck than me. gary

Dec 13th, 2017, 12:54	#6
gbartling Junior Member Last Online: Sep 12th, 2022 10:57 Join Date: Nov 2004 Location: Liverpool	fixed!! problem with hard brakes was rubber gasket on new master cylinder missing, replaced with one from old unit and ok. bled system through with new fluid and using a pressurized bleeder instead of my vacuum one and everything is now ok. never got an answer from volvo dealer in Warrington about new master cylinder and all the new ones online are different to the original, does anybody know where i can get an original new one as i'd prefer a new one to the used one i fitted specially now iv'e proved the master was to blame. Gary

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