Login Register

94 850 brake switch on booster

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

Post Reply
User avatar
skloon
Posts: 526
Joined: 17 June 2010
Year and Model: 94 850 95 850 04 S60
Location: Edmonton AB
Been thanked: 2 times

94 850 brake switch on booster

Post by skloon »

When installing my new engine I smacked the sensor #271892 and broke it- a friend was helping and he used waterpump pliers and broke the grommet thingy out of the booster- I have a spare switch but is the grommet available separately or do I have to buy an entire booster ?

Sommerfeldt
Posts: 1148
Joined: 29 July 2008
Year and Model: 2018 S90 T8
Location: Oslo Area, Norway
Has thanked: 55 times
Been thanked: 42 times

Post by Sommerfeldt »

Neither.
#271892 is a kit w/ "grommet" and sensor. 100 bucks. I'm not sure what switch you're talking about...

- S
2018 S90 T8 Inscription - glossy black with amber interior and dark as night rear windows.
[Gone] '96 855 T5 - R bumper and spoiler, Koni Yellows & blue H&R springs all 'round.
[Sold] '97 S70 T5
[Gone] '95 855 T5-R - one of the black ones... sadly stolen and wrecked.

Ozark Lee
MVS Moderator
Posts: 14798
Joined: 7 September 2006
Year and Model: Many Volvos
Location: USA Midwest
Has thanked: 4 times
Been thanked: 76 times

Post by Ozark Lee »

Through the '95 model year the brake booster had a range switch in the brake booster that told the ABS how hard the brake was being applied. The switch isn't on/off but rather it is segmented.

The bad thing about removing the switch is that the O ring will pop off and get sucked into the booster unless you relieve the vacuum by pressing the brake pedal several times (car off). Once it gets sucked in you can't really fish it out.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

User avatar
skloon
Posts: 526
Joined: 17 June 2010
Year and Model: 94 850 95 850 04 S60
Location: Edmonton AB
Been thanked: 2 times

Post by skloon »

What broke is the plastic collar that is on the booster- I have the switch and o-ring but not that part

User avatar
skloon
Posts: 526
Joined: 17 June 2010
Year and Model: 94 850 95 850 04 S60
Location: Edmonton AB
Been thanked: 2 times

Post by skloon »

P1030364.JPG
P1030363.JPG
Here are some pics if it makes it clearer

Post Reply
  • Similar Topics
    Replies
    Views
    Last post