The Volvo 122S rear wheel brakes are of the drum type. In order to remove the drums you need a special drum brake puller. And because I didn't had this special puller I postponed this job for months. Finally I decided to buy one of those pretty expensive pullers and last weekend the brakes saw daylight after decades of darkness...
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| Original Volvo 122S drum brake puller |
Don't try to use universal pullers because you will certainly damage the brakes.
Instead of most universal pullers this original one has a big bolt with a flat end. Most other pullers have a center point end which can easily damage the drive shaft. I used a special hammer spanner to loosen the drums. After hammering the spanner a couple of times the drum came loose with a big bang.
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| Volvo 122S rear drum brake |
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| Volvo Drum brake puller with 32mm hammer spanner |
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| Finally the drum came loose |
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| Inside the right drum brake |
As you can see in the pic above the brake shoes in the right drum were upside down. The lining of the brake shoe at the end should start on top of the shoe. If the shoes are fitted the wrong way round the handbrake won't work correctly.
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| New drum brake shoes |
The latest model Volvo 122S has self adjusting drum brakes. Every time you pull the handbrake the brakes will be adjusted. Unfortunately this system isn't very reliable so it's a good idea to check 'm every now and then. They can also be adjusted by hand just by putting a screwdriver into the little hole in the drum and turn the adjuster screw a couple of notches.
After taking all the old parts out I gave the brakes a good clean and took off the sharp edge of the lining before putting in the new brake shoes.
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| Grinding off the sharp edge of the brake lining |
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Shaved lining brake shoe
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I also replaced the wheel cylinders and brake hoses, they aren't too expensive and I was pretty sure the old wheel cylinders wound't work after doing nothing for more than 15 years. The flexible hoses can be very tricky because the look good on the outside but after many years they are swelling on the inside en thus are often blocked. Don't forget the copper ring between the brake hose and the brake valve
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| Old flexible brake lining removed |
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| Fitting the new brake hoses with copper ring |
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| Left drum brake Volvo 122S with new parts |
Make sure the big bolts are fully tightened. I used the 32 mm hammer spanner to tighten them.
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| Drum brake ready for the wheel |
Time for fresh brake fluid and bleeding the brakes.
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