V/S 70s -- Thoughts on Preventive Maintenance -- Brakes

Post by **MrPc** » 17 Apr 2015, 09:37

Reading this, I feel like I got lucky when I replaced my brake hoses--I managed to change both fronts and rears and bleed the system in a short afternoon.

The rear hose over the delta link was the most daunting. It was in good shape, and I approached it with a "what the heck" attitude. I had already ordered the part and figured I could just leave the old one in if I couldn't remove it. It did take some patience, and a good flare nut wrench, but I found it wasn't nearly as hard I was expecting.

One of the secrets to my good luck is having a Pacific Northwest car. There was practically no corrosion on any of the fittings. If rust or the need or great leverage had been involved, I suspect I would still be running the old delta link hose, or still be under the car...

Post by **erikv11** » 17 Apr 2015, 10:02

I agree, it's going to vary car by car, some may be impossible some pretty easy, you won't know until you try.

Last fall when I dismantled the rear brakes on my parts car while it was in the driveway, I did not have much trouble with the brake hose above the delta link so I was able to just remove it all piece by piece, from caliper to metal lines to hose (I threw out the hose, kept the lines and calipers). I think it took about an hour and a half to remove everything, including the rear hubs.

Post by **abscate** » 17 Apr 2015, 10:49

Don't forget to replace all the brake fluid on major brake work - its due every 2 years!!

Post by **abscate** » 08 Apr 2021, 01:35

The delta link design on the p80 is a wonderful marriage of design, simplicity, and performance. Basically, two major wear parts.

Post by **Clemens** » 08 Apr 2021, 02:11

Yet the design never really got popular, right?

Post by **Eddystone** » 08 Apr 2021, 10:05

I would never allow my rear suspension to get into the deplorable sort of condition this one pictured is in.

Some people just don't maintain their Volvos.

cn90 wrote: 17 Apr 2015, 08:58 Further to what I said above...
I "borrowed" this photo from the web to show you how I'd approach the hose above delta link.

VolvoRearHose.JPG

Post by **abscate** » 11 Apr 2021, 06:32

Eddystone wrote: 08 Apr 2021, 10:05 I would never allow my rear suspension to get into the deplorable sort of condition this one pictured is in.

Some people just don't maintain their Volvos.

cn90 wrote: 17 Apr 2015, 08:58 Further to what I said above...
I "borrowed" this photo from the web to show you how I'd approach the hose above delta link.

VolvoRearHose.JPG

Look at the grease stains on those delta links....horrible

Post by **BlackBart** » 11 Apr 2021, 19:59

Learn me something here about this geometry please.

If one wheel is at full droop (as in extreme cornering), is the lateral link from the opposite side affected to the point it changes camber or toe? There's a "bit" of a swing arm length from the bushing to where the cross link is attached.

Post by **abscate** » 12 Apr 2021, 04:10

BlackBart wrote: 11 Apr 2021, 19:59 Learn me something here about this geometry please.

If one wheel is at full droop (as in extreme cornering), is the lateral link from the opposite side affected to the point it changes camber or toe? There's a "bit" of a swing arm length from the bushing to where the cross link is attached.

I think that’s right but the weight of the wheel would be so small compared to the cornering force I think they thought this through in the design. These cars certainly corner on rails.

The rear sway bar also helps on that if you have it

befarrer · Post by **befarrer** » 12 Apr 2021, 06:05

Wow, one thing that is easier on AWD cars. Rear brake hoses. But there are 2 on them. As for the rear suspension, I think the design of the AWD multi link rear suspension significantly increases camber on compression due to the unequal length upper and lower control arms, and also increases toe due to the longer rear lower toe rod.