Washing machines series Siemens IQ500 are deservedly considered one of the most reliable units on the household appliances market. German assembly and high-quality components ensure a long service life, but even the most advanced equipment is subject to wear. One of the most common symptoms indicating the need for serious repairs is a humming sound during the spin cycle. If you hear an increasing noise, reminiscent of the roar of an airplane taking off, or notice play in the drum, then it’s time to change bearing unit.
Many owners immediately call a specialist, fearing the complexity of the procedure. Indeed, the process requires time, accuracy and a basic set of tools. However, independent bearing replacement allows you to save a significant amount, since the cost of service work is often comparable to the price of a new car. In this article, we will analyze in detail all stages of repair, from diagnostics to final assembly, so that you can complete the job efficiently and safely.
It is important to understand that ignoring a problem in the early stages can lead to more serious consequences. A damaged bearing can damage the rotor shaft or even cause the tank to leak. In Siemens IQ500 washing machines, bearings are often pressed directly into the plastic tub, which requires a special approach when extracting them. Unlike models with a collapsible tank, this may require a complete replacement of the tank assembly or the use of special tools for pressing out.
Diagnosis of malfunction and preparation for repair
Before starting disassembly, you need to make sure that the source of the noise lies in the bearings. Sometimes extraneous sounds can come from foreign objects caught between the tank and the drum, or from a weakened counterweight. For an initial check, open the hatch and shake the drum by hand. If a noticeable play is felt up and down or a characteristic metallic knock is made, the diagnosis is confirmed.
Also pay attention to the condition of the hatch cuff. If black streaks from grease or rust are visible on it, this is a sure sign that the seal has lost its seal, water has entered the bearing and washed away the grease. In this case, replacing only the bearing without replacing the oil seal does not make sense - the unit will fail again in a short time.
To carry out the work you will need to prepare a workplace. The washing machine must be disconnected from the power supply and the water supply must be turned off. Stock up on rags in advance, as water may remain inside the tank. You will need the following tools:
- 🔧 Set of screwdrivers (phillips and flat) and wrenches (including socket).
- 🛠️ A special puller for bearings or a hammer with a drift.
- 🧼 New bearing grease (waterproof).
- 🧤 Gloves to protect hands from sharp metal shavings.
⚠️ Attention: Before starting work, be sure to drain the remaining water through the drain filter and remove the machine from the hooks of the transport bolts, if installed.
Disassembling the housing and removing the tank
Disassembly process Siemens IQ500 has its own characteristics. Unlike many other brands, here the top cover is removed by unscrewing two screws on the back and sliding it back. The side walls are usually non-removable, which requires care when removing internal components. First remove the top cover, then remove the detergent dispenser and remove the hatch cuff clamp.
Next, you need to disconnect all communications going to the tank: pipes, heating element wires, water level sensors and valves. It is recommended to take photographs of each connection step so as not to get tangled in the wires during assembly. Pay special attention to the wires going to the engine and tachometer - damage to them can lead to expensive electronic repairs.
After disconnecting all hoses and wires, the tank, along with the engine and counterweights, is removed from the housing. In the model Siemens IQ500 The tank can be quite heavy, so it is better to carry out this operation with an assistant. Place the unit on its side on a soft surface to avoid scratching the floor or damaging the plastic parts.
☑️ Checklist before removing the tank
Disassembling the drum assembly and removing old bearings
A tank that has been repaired must be disassembled. Most models The Siemens tank consists of two halves, bolted around the perimeter, or is non-separable. If your tank is collapsible, carefully unscrew the bolts and separate it. If the tank is welded (non-separable), you will need to either carefully cut it along the seam (which is risky without experience), or drill out the old bearings without removing them from the shaft, using a die cutter.
To remove bearings from their seats in an aluminum bushing (or plastic tank body), it is most convenient to use a puller. If there is no puller, you can knock them out from the back, but you need to act extremely carefully so as not to deform the seat. Often old bearings are Siemens IQ500 are marked, for example, 6203 and 6204, but it is better to double-check the dimensions after removal.
After removing the bearings, thoroughly clean the rotor shaft and seats from old rust and dirt. Use fine grit sandpaper to polish the shaft. Any roughness on the shaft will quickly damage the new seal, and water will again begin to seep into the bearings.
What to do if the rotor shaft has wear?
If a deep groove has formed on the shaft where the oil seal sits due to wear, simply replacing the oil seal will not help - it will quickly leak. In this case, you can try to move the cuff a little deeper (if the design allows) or use a repair seal with a spring, but the safest thing to do is to replace the entire drum assembly or rotor shaft.
Selection of new parts and lubricants
The quality of new bearings directly affects the service life of the machine after repair. Don't skimp at this stage: choose products from well-known brands such as SKF, FAG, NSK or Koyo. Cheap Chinese analogues may begin to make noise after just a few months of active use. For Siemens IQ500 Typically a pair of bearings are required, one smaller (pulley side) and one larger (drum side), as well as a new oil seal.
Pay special attention to the choice of lubricant. Regular Litol-24 or solid oil will not work, as they are washed out with water at high temperatures. A special waterproof lubricant for washing machines is required, which retains its properties at temperatures up to 95°C and above. It provides protection against corrosion and reduces friction.
Below is a table with the bearing sizes most commonly found on Siemens machines, but always check the markings on your parts:
| Position | Standard size | Dimensions (mm) | Features |
|---|---|---|---|
| Near (to the tank) | 6204 (2RS) | 20x47x14 | Closed, takes the main load |
| Far (towards the pulley) | 6203 (2RS) | 17x40x12 | Closed, smaller diameter |
| Oil seal | 20x40x7/10.5 | Depends on model | Must have a spring |
⚠️ Attention: Bearings marked "Z" or "ZZ" (metal shields) are not suitable for washing machines. Use only bearings with "2RS" or "RS" rubber seals.
Installing new bearings and assembling the unit
Before installing new bearings, they must be generously lubricated. Fill the space between the balls with grease and place it under the O-rings. This will ensure quiet operation and a long service life. We also lubricate the new oil seal outside and inside before installing it on the shaft.
Installation of bearings on the shaft is carried out carefully; hammer blows should fall only on the inner ring. If you hit the outer ring or cage, the bearing will be damaged. It is best to use a mandrel of the appropriate diameter. The oil seal is installed in the tank seat and pressed evenly in a circle.
After assembling the unit, check that the shaft rotates easily. It should rotate smoothly, without jamming or extraneous sounds. Make sure there are no distortions. Reassemble the tub halves (if collapsible) using new washing machine sealant and let it dry according to the instructions.
Uniform pressing of the bearing and high-quality lubrication is the key to ensuring that the machine will last another 5-7 years without repair.
Final assembly and testing
Place the assembled tank and drum back into the machine body. Connect all the wires and pipes, focusing on the photographs taken earlier. Pay special attention to grounding and reliability of contacts. Attach the counterweights and check the tension of the drive belt (if it is not straight).
Before installing the top cover and panels, run a test wash without any laundry. This will allow you to check the tightness of the connections and the absence of vibrations. If the machine runs quietly and water does not drip from under the tank, the repair can be considered successful.
During operation after repair, it is recommended to carry out the first couple of washes in a gentle mode so that the new lubricant is distributed over the bearings and the oil seal is ground in. Check the condition of the cuff regularly and use special products to descale the machine.
How long does it take to replace a bearing?
For an experienced master, the process takes about 2-3 hours. For a beginner doing this for the first time, it is worth setting aside 4-6 hours, including time for searching for information, careful disassembly and cleaning parts from rust.
Is it possible to lubricate the bearing without removing it?
There are methods of “treating” a bearing by injecting lubricant through a syringe with a needle, but this is a temporary measure. In a washing machine, where there is water and high loads, such a bearing will not last long. Complete replacement is the only reliable solution.
Why is the new car buzzing?
If a hum appears after replacing the bearings, check whether the belt is installed correctly (not twisted), whether the wires are touching the drum, and whether the tank bolts are tightened evenly. Also, a new bearing may hum during the first 10-15 minutes of operation while the lubricant is distributed.