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99 V70. Handbrake works in forwards motion only.

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

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
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1997 - 2000 V70, V70 AWD
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Liggywuh
Posts: 10
Joined: Wed Oct 15, 2014 12:02 pm
Year and Model: V70 1999
Location: Sweden
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Liggywuh

99 V70. Handbrake works in forwards motion only.

Post by Liggywuh » Sat Feb 01, 2020 12:42 pm

Hey!

After a little bit of advice, as in, what I need to do to fix the issue. Base V70, 2.5 manual.

About 2 or 3 years ago, the car got 2 new rotors, pads and handbrake shoes and cables (all blue box). Got stuff installed, probably not perfectly adjusted, but the car stood still on hills, pointing in either direction.

Gradually, the car has started rolling backwards with just the handbrake on. If I put the car in reverse and gently lift the clutch, the car will roll backwards (on flat ground). If I put in in first gear, and lift the clutch, the handbrake bites, and the rear suspension compresses. Lift the clutch and repeat with reverse gear, and the car rolls back. I tried basic adjustment at the handbake lever, it makes the handbrake come on "earlier", but has no effect on the overall power of the handbrake.

Is this just a screwdriver through the hole adjustment issue, or maybe something else (there was a fairly "complicated" bit in the hub that was basically seized when I did the repair, that I got working smoothly, has the same happened again?)

The car has done 50k km in the last 7 years, we don't travel a lot with it, so I guess stuff has had more time to seize up due to rust, than I would like.

Many thanks for your input, and let me know if you need more help to help me diagnose the issue!
99' V70 Greyline. 165HP, 2.5L 20V (Swedish)

scot850
Posts: 5665
Joined: Mon Apr 05, 2010 2:46 pm
Year and Model: 2000 V70 R
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scot850

Re: 99 V70. Handbrake works in forwards motion only.

Post by scot850 » Sat Feb 01, 2020 1:25 pm

Remove the rear rotors and clean the inside of the brake drum portion. Use fine sandpaper or steel wool to make sure there is a little 'texture' to the drum surface. A build up of brake shoe dust and environmental dirt polishes the drum and due to the design of the shoes, they then work only in the forward motion. The second issue is de-laminating of the shoes which has a similar affect, or polishing of their surface. Again roughening the surface of the shoes will also help.

Volvo had a process for cleaning the shoes involving driving the car with the parking brake on for a short distance. It was to clean any dirt or debris from the inside of the drum face. I can't recall if that was in the handbook or in an older version of Vida. Wish I could remember but my old Vida laptop has died and don't have time currently to try to fix it, sorry.

Finally, check the parking brake cables have not split or are sticking. That will also have a similar effect. Make sure they are moving smoothly on both sides.

Then adjust the shoes on each side until they lock the rotor up completely, and then back off 2-3 clicks. Then adjust at the hand-brake lever to allow 3-5 clicks when pulling the lever up.

Good Luck.

Neil.
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Liggywuh
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

Liggywuh
Posts: 10
Joined: Wed Oct 15, 2014 12:02 pm
Year and Model: V70 1999
Location: Sweden
Has thanked: 1 time
Been thanked: 0
Sweden
Liggywuh

Re: 99 V70. Handbrake works in forwards motion only.

Post by Liggywuh » Sat Feb 01, 2020 1:34 pm

Thank you very much, I can defo make sure to clean them up at lower speeds. I barely uise the brakes so the rear rotors are rustier than I would like as well :)
99' V70 Greyline. 165HP, 2.5L 20V (Swedish)

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