Many Xiaomi electric scooter owners sooner or later face the need to maintain the chassis, and the most vulnerable element here is the rear wheel.Puncture of the camera, tread wear or the appearance of backlash in bearings require immediate intervention to avoid more serious breakdowns of the electric motor. Disassembling the rear wheel on a Xiaomi scooter is a task that seems difficult only at first glance, but requires attention, the right tool and understanding of the design of the unit.
Unlike the front wheel, the rear hub is integrated with the motor, which imposes certain limitations and requires safety when working with electrical components. Xiaomi M365, Pro and Pro 2 have a similar design, but the Pro and Pro 2 models have added additional wiring protections that can not be damaged. The main difficulty is to remove the stop rings on the inside of the hub, which often stick or require specific effort to dismantle. In this material, we will discuss each step of the process in detail so that you can perform the repair efficiently and safely.
Workplace preparation and necessary tools
Before you start dismantling the wheel, you need to organize a comfortable workspace, as the process can take from 30 minutes to several hours depending on the condition of the fasteners. You will need a clean, flat surface, good lighting and a set of tools that will provide access to all mounting units. Lack of preparation often leads to the loss of small parts or damage to the plastic elements of the scooter body.
To successfully complete the work, you will need the following set of tools:
- 🛠️ Set of hexagonal keys (mandatory presence of 5 mm and 8 mm).
- 🔧 Special key for the engine nut (usually included or purchased separately for the size) 10 mm/12 mm).
- 🔨 Hammer and set of pins or strong screwdrivers for knocking out axles.
- 🧤 Gloves to protect hands from sharp edges and lubrication.
- 🧴 Penetrating lubricant (WD-40 or analogues) for the treatment of acidic compounds.
Special attention should be paid to the specialized key for the engine nut, as standard carob keys can lick the edges or not provide enough effort. If you do not have a factory key, you can use a jack key of the appropriate size, but you need to act extremely carefully. It is also recommended to prepare a container for folding screws and bolts, so as not to lose them in the process of operation.
☑️ Preparation for disassembly
Dismantling the wheel from the frame of the scooter
The first step is always to turn off the power of the scooter, which is a critical safety requirement when working with the high-voltage battery and controller. Turn the scooter upside down or install it on a special stand, providing free access to the rear and the ability to rotate the wheel. Make sure that the device is stable and does not fall during the removal of the fasteners.
The removal process begins by disconnecting the motor-wheel connector, which is under the protective cover on the inside of the pendulum, carefully remove the plastic plug by unscrewing the locking screw, and disconnect the chip, trying not to pull the wires sharply, and then you can begin mechanical dismantling, unscrewing the bolts of the brake caliper mount and removing it from the disk so that it does not interfere with the extraction of the axle.
To remove the wheel, the axis holding it in the pendulum must be knocked out:
- 🔩 Treat the axis with penetrating lubricant and wait 10-15 minute.
- 🔨 Carefully knock out the axis on one side using a hammer and a fit diameter embroidery.
- 🌀 Remove the locking washer and nut from the opposite side (if the design provides for the).
- 🛴 Remove the axle completely and remove the wheel along with the brake disc.
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Photograph the position of all washers and parcel rings before removing them - this will help to properly assemble the knot back and avoid skewing the wheel.
Disassembly of the motor-wheel and removal of the tire
Once the wheel is removed from the frame, you are challenged to separate the two halves of the hub to get to the camera or the insides of the engine. In Xiaomi M365 and Pro models, the halves are fastened around the perimeter with a variety of screws that often sour due to moisture and dirt. Cross screws can have broken hats, so use only quality bits with a good grip, so as not to aggravate the situation.
If the screws are unscrewed, but the halves are not moving apart, they may be stuck or pinched in the tire. In case you change the camera, first completely flush the air and select the tire on one side. To remove the rubber from the disc, use mounting blades, acting carefully so as not to damage the cable inside the tire or not to catch the stator winding.
It is important to take into account the differences in the design of different versions:
- 🔋 In the version M365 The screws are arranged in a circle and require complete twisting.
- ⚡ The Pro model has a reinforced design and additional wiring protection.
- 🛡️ In the Pro 2 version, the wiring scheme has been changed, which requires special attention when disconnecting the halves.
What to do if the screws do not unscrew?
Work with bearings and locking rings
The most difficult part of disassembling the rear wheel on a Xiaomi scooter is working with bearings and their retainers. Inside the hub, bearings are held by locking rings (clips) that are inserted into the slots on the inside. These rings are often oxidized and require considerable effort to extract, which can lead to tool breakage or injury if not followed carefully.
To remove the locking ring, use a thin flat screwdriver or special forceps, carefully putting the ring in several places in a circle. Do not try to pull it out with one jerk, as the metal can burst or slip with great force. After removing the lock, the bearing is knocked out of the landing place on the outside of the hub with a stick that rests on the inner edge of the bearing.
When installing new bearings, pay attention to the following points:
- 📏 The bearing should sit in the seat without distortion and excessive effort.
- 🧼 Before installation, clean the seat from old lubrication and corrosion.
- 🔒 Make sure the locking ring sits in the groove before clicking around the perimeter.
⚠️ Warning: When you knock out an old axle or bearings, never hit the motor body or magnets directly – this can lead to demagnetization and irreversible damage to the engine.
Diagnostics and table of compatibility of details
During the disassembly process, it makes sense to conduct a complete revision of all elements of the chassis, since access to them in assembled form is limited. Check the condition of the winding for overheating (blackening of the varnish), assess the integrity of the wires and check the backlash of the shaft. Often the problem of wheel beat is not only in the bearings, but also in the wear of the seats on the shaft or the hub itself.
Below is a table that helps identify the main nodes and their typical faults when disassembling the rear wheel:
| Element | Typical malfunction | Method of diagnosis | Decision |
|---|---|---|---|
| Bearing 6004 | Crunch, booze, hum | Hand-spinning, swaying | Replacement with a new one |
| Camera. | Puncture, etching. | Visual inspection, immersion in water | Salary or replacement |
| Wiring | Break, short circuit. | Multimeter vertebrating | Pike, isolation. |
| Hub screws | Corrosion, thread failure | Visual examination | Stainless replacements |
If the diagnosis revealed damage to the winding or a strong beating of the shaft, repair may require the use of a press or contact a specialized service. At home, you can only replace bearings and a camera, the rest of the work requires high qualification.
Build a node and eliminate common errors
The assembly is done in reverse disassembly order, but there are some nuances that can lead to repeated failures. When connecting the halves of the hub, make sure that the wiring is laid in its channels and will not be clamped or rubbed during rotation. The tightness of the connection is a key factor in durability, so it is recommended to smear the joint of the halves with a thin layer of silicone sealant.
When twisting the screws of the hub, use a cross-to-cross scheme, gradually tightening them to ensure that the surfaces fit evenly. Do not drag the screws, especially if they are screwed into aluminum, as this can lead to the pulling of the thread. After assembly, check the free rotation of the wheel and the absence of foreign noise before installing it on the frame.
Frequent errors in assembly:
- ❌ A forgotten bearing locking ring that will cause it to fall out.
- ❌ Incorrect installation of wires, leading to their rubbing.
- ❌ Lack of sealant, allowing water to get inside again.
⚠️ Attention: Before the first trip after assembly, be sure to check the tightening of the wheel axis and the mounting of the brake caliper on a static scooter, scrolling the wheel and pressing the brake.
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High-quality rear wheel assembly requires not only the right actions, but also the use of sealants and fixation of threaded joints so that moisture and vibration do not destroy the knot again.