6 DEALER MANUAL FOR M820 (MM G532.250.C)
6.1 Introduction
Scope
Applies only to electrically powered bicycles, and specifically designed or licensed for Pedelec. It is suitable for road bikes on city roads, cement and asphalt roads and travel bikes on gravel roads. It should not be used commercial purposes.
Identification
Diagram showing the motor housing with identification numbers, including CE marking and a label part.
Product Model
MM G532.250.C
Note: Content in the label is important information about this product. Please do not remove the information from the motor.
6.2 Specifications
| Motor model | MM G532.250.C |
|---|---|
| Rated power (W) | 250 |
| Rated voltage (V) | 43 |
| Waterproof | IP65 |
| Certification | EMC / ISO13849 |
| Outdoor Temperatures | -20 °C ~ 45 °C |
6.2.1 Outline and Geometric Size
Diagram showing the motor's outline and geometric size with various dimensions and angles indicated.
Additional diagram showing top/front and side/bottom views with dimensions, including center of bicycle and chainwheel installation plane.
6.2.2 Surface
Shockproof black coating.
6.2.3 Storage Information
The pedelec should be stored in a ventilated dry room. Avoid storing the pedelec near strong magnetic objects.
6.3 Drive Unit Installation
6.3.1 List of Tools to be Used
| Use of the Tools | Tools |
|---|---|
| To tighten/loosen bolts onto the frame interface and the drive unit | ? Internal hex wrench (5mm) |
| To tighten/loosen nuts onto the frame interface and the drive unit | ? Socket spanner (10mm) |
| To tighten/loosen M15 waterproof screws on the crank | ? Internal hex wrench (8mm) |
| To tighten/loosen lock-nut on chain wheel | ?️ BAFANG Tool |
| To tighten/loosen screws on the speed sensor | ➕ Cross screwdriver |
| ⭐ Star screwdriver |
6.3.2 Cabling
Diagram illustrating the motor connectors and cable connections: A (Female 8 pin at drive unit), B (Male 8 pin at drive unit), C (Male power supply at drive unit), a (Male 8 pin from EB-BUS to speed sensor), b (Female 8 pin from EB-BUS), c (Female power supply at battery).
6.3.3 Motor Installation
Diagram showing motor installation components: A (M8 bolts), B (M8 Flat washer), C (M8 Lock nuts), D (Standard tool).
- Align the three mounting holes of the drive unit with the mounting holes in the bike frame.
- From the right of the bike frame, insert three M8 bolts into the mounting holes in the bike frame and the drive unit.
- From the left, use a standard tool to tighten the three M8 Lock nuts with flat washer on the bike frame.
- Tightening torque requirement: 35 N.m.
6.3.4 Drive Unit Cover Installation
Diagram showing drive unit cover installation: A (Left cover), B (Right cover), C (M3*8 star pan head screws).
Use a screwdriver (T10) and three M3*8 star pan head screws to fasten the motor cover and the interface together. The tightening torque requirement is 0.9-1.0 N.m.
6.3.5 Chain Wheel Installation
Diagram showing chain wheel installation components: A (Chain wheel), B (Lock ring), C (BAFANG's tool), D (Standard tool).
Put the chain wheel onto the spline shaft of the drive unit. Use BAFANG's tool to fasten the lock ring counterclockwise onto the spline shaft. Torque requirement: 35 N.m.
6.3.6 Crank Installation
Diagram showing crank installation components: A (Left crank), B (Right crank), C (M15 waterproof screws).
Mount right crank on the right shaft, using an internal hex wrench to fasten the M15 screws on the shaft (tightening torque is 45-50 N.m). Mount the left crank on the shaft in the same way. Please ensure the left and right crank are parallel.
6.3.7 External Speed Sensor Installation
Diagram showing speed sensor (A) installation on the frame and magnet (B) on a wheel spoke, with an indication of rotation.
Fasten the mounting screws through the speed sensor and with a cross screwdriver. Tightening the speed sensor onto the frame. Torque requirement: 1.5-2 N.m. (Note: Please make sure the gap between the speed sensor and the magnetic unit is between 10 and 20 mm.)
Now place the magnet on the spoke of the wheel ensuring it is aligned to the middle of the speed sensor. And with a star key tighten the magnet in place. Torque requirement: 1.5-2 N.m.
6.4 Maintenance
- Maintenance must be carried out by authorized personnel with the correct equipment.
- Do not disassemble the motor.
- Do not use thinners or other solvents to clean the components. Such substances can damage the surfaces.
- Avoid water submerging, to keep the components protected.
- Avoid using high-pressure cleaning jets.
- For prolonged storage, turn off the battery and avoid storing near heat sources.
