The noise was stronger when I turned right and it was almost gone when I turned left.
Yep...a worn out left wheel bearing. Left because the car puts more weight on the left side when turning right.
I decided to replace the rear wheel bearings on both sides. The name wheel bearing is a bit misleading because the bearing is not somewhere in the wheel but inside the rear axle. When replacing the wheel bearings it's smart to replace the oil seals,gaskets and retainers with the felt seals as well.
|Complete set for one side|
|New Timken rear wheel bearing|
Now you have to remove the 4 nuts holding the retainer with felt seal, the two gaskets and the thick metal plate between the gaskets and of course the big black brake backing plate..
|brake backing plate with old gasket, retainer with felt seal and metal plate with other gasket|
Now you can remove the left side half shaft. Well...it's not that easy, according to the Haynes manual you need a special tool to press it out. The outer race is pressed in the hollow axle and will give you a hard time.
|Half shaft with rear wheel bearing Volvo 122S|
But as always there's a nice little trick to get this thing out. I put back on the drum brake and gave the big nut a couple of turns. Now get under the car and hammer (not too hard) on a piece of wood held against the drum. Do this on the left, right, top en bottom side of the drum and after a while it will come loose. You can use the drum as a nice handle to pull the half shaft out of the axle housing.
|Drum used as a "special tool" to get the half shaft out of the axle housing|
|Half shaft coming out of the rear axle housing of the Volvo 122S|
|Removing the woodruff|
|Inner and outer half of the rear wheel race still on the half shaft|
|Half shaft with inner and outer race of the wheel bearing|
When I took a closer look at the outer race of the old wheel bearing I could see why it made such a noise; half of the inside was damaged. There was almost no grease left in the bearing.
|Old Bower outer race of the wheel bearing|
|Old SKF inner race of the wheel bearing|
Next thing to do is removing the oil seal inside the hollow axle. And again you need a special tool... This time I used a water pump plier. You'll damage the old oil seal but that doesn't matter as long as you don't damage the inside of the rear axle housing, so be care full again.
|Old oil seal inside the rear axle Volvo 122S|
|Taking out the old oil seal|
|Old oil seal rear axle removed Volvo Amazon|
|Parts of the old oil seal and also the new oil seal|
I used a 36mm socket and a bit of thin oil to tap the new oil seal back in place. (Before installing the new oil seal make sure everything inside the outer axle housing is really clean). Now carefully tap the new inner wheel bearing on the half shaft and slide it back in the axle. be careful not to damage the new oil seal and the diff. Fill the bearing with lithium grease or some other high temp resistant grease and carefully put back the new outer bearing. Carefully because it's a bit difficult to get it nice and even in the hollow axle. I pushed the first mm in and used the old retainer plate and the 4 nuts to drive it in evenly till it was almost flush with the axle.
|36 mm socket to tap in the new oil seal|
|New oil seal rear axle back in place|
|Castrol Wheel bearing grease|
|Inner rear wheel race back in place and filled with grease|
|Outer race half way in Spicer 3010 axle housing|
|Using the retainer to press the outer wheel bearing back in place|
|Rear wheel bearing back in place Volvo 122S|
After removing all the brake parts I could take off the brake backing plate and have a look at the shims between the backing plate and the end of the axle housing.
|Shims on the right side of the Spicer rear axle|
Then I tried to measure the play of the half shaft with a dial indicator. According to the manual it should be between 0.07 and 0.20 mm. Well, I tried but I couldn't get an accurate reading because the end of the shaft isn't that smooth so even with the slightest turn you get an incorrect reading on your dial indicator.
|Measuring the rear axle play with a dial indicator|
I couldn't feel any play so I decided to leave it like the first set up and after fitting back all the brake parts , wheels and bleeding the brakes I took the Amazon for a test drive... All good.