Mercedes W168 rear wheel bearing replacement
Content
I have a Mercedes W168, 2003 release. When driving at a speed of more than 40 km / h, noise appeared in the rear of the chassis. After diagnosing, I determined that I needed to replace the right rear wheel bearing.
Diagnostics
To diagnose, lift the wheel that makes you suspicious. Then turn it by hand, if the bearing is worn, you can clearly hear the balls rolling in the bearing. Still hold the wheel upright and rock it sideways, there should be no bumps or noticeable play.
Selection of spare parts
I bought a bearing from the manufacturer FAG under the article 713 6681 80. The bearing is of good quality, I hope it will last a long time since the replacement process is laborious.
Tools and materials for work:
- Penetrating lubricant;
- Copper grease;
- Silicone Grease;
- Metal brush;
- Wrench;
- Bit Torx T30 and adapter to it;
- Socket for twelve, sixteen, thirty;
- James;
- Wheel bolt wrench;
- Various mandrels for pressing the bearing;
- Ratchet collar;
- Chisel;
- Wrench;
- Screwdriver;
- Extension;
- A hammer;
- Rubber hammer;
- Impact driver;
- Pliers;
- Mounting lever.
Photo Report
1. Open the hood and unscrew the plug of the brake fluid expansion tank.
2. We loosen the wheel bolts, raise the jack, completely unscrew the bolts and remove the wheel. If your tires are worn out, you can buy new ones online at one of the popular tire shops.
3. Using a flathead screwdriver, press down on the brake piston a little to make it easier to remove the caliper. We focus on the caliper and the non-working part of the pickup.
4. We process the bolts of the WD-40 caliper and unscrew them with a twelve head. After unscrewing the bolts, remove the caliper and tie it to the spring.
5. We unscrew the screws of the caliper caliper and disassemble it. The bolts must first be cleaned and treated with a penetrating lubricant. Sixteen bolts.
6. Unscrew the locking screw of the brake disc with a drummer and remove it. The screw must be pre-cut and treated with a penetrating lubricant. If the brake disc is stuck to the hub, hit it with a rubber mallet and it will disengage. Drive fixing screw for Torx T30.
7. Using a pry bar and hammer, knock out the hub nut cap.
8. With a hammer and a chisel, we knock out the rolled plugs of the hub nut.
9. Unscrew the hub nut with an electric wrench with a thirty head.
10. Remove the hub from the shaft and proceed to re-press the bearing.
11. You can replace the bearing in a vise or hydraulic press. First, hit the retaining ring and remove it with tweezers.
12. We select mandrels and take out the bearing.
13. We clean the seat and apply silicone grease.
14. Lubricate the outer race of the bearing and press it into place until it stops. Please note that when pressed, the stop can only be placed on the outer clamp. If you focus on the inside, the bearing will be damaged.
15. Install retaining ring and assemble.
When assembling, pay attention to some nuances:
- Clean and treat with copper grease the surface of the hub, as well as the brake disc;
- Service the caliper guides. Check the integrity of the anther and, if necessary, replace the lubricant;
- Check the condition of the brake pads and guide springs. Replace if necessary.
Tightening torques
- Hub nut - 180 Nm (after tightening, do not forget to turn the stopper). Use a new nut, it usually comes with the bearing.
- Caliper bracket bolts - 70 Nm.
- Caliper mounting bolts - 35 Nm.
- Wheel bolts - 120 Nm.
