BAFANG MM G333.250.C User manual

1
DEALER MANUAL FOR MOTOR
BF-DM-C-MM G333-EN November 2019
6.1 Introduction 
6.2 Specifications 3
6.2.1 Outline and geometric size 3
6.2.2 Surface 4
6.2.3 Storage Information 4
6.3 Drive Unit Installation 5
6.3.1 List of Tools to be used 5
6.3.2 Install drive unit to connection interface 6
6.3.3 Cabling 7
6.3.4 Cable connector and method of using BAFANG tool 7
6.3.5 Bash Guard and Cover Installation 8
6.3.6 Chain Wheel Installation 9
6.3.7 Crank Installation 9
6.3.8 External Speed Sensor Installation 10
6.4 Maintenance 12
CONTENT
6 DEALER MANUAL FOR M410
(MM G333.250.C)

2BF-DM-C-MM G333-EN November 2019
6.1 INTRODUCTION
•Product Model
MM G333.250.C
•Scope of Application
Only apply to electric powered bicycles, and
specifically designed or licensed for pedelec. It is
suitable for mountain bikes. It should not be
used for competition or other commercial
purposes.
•Identification
There are the unique identification of the
product on the housing, as shown in figure:
Note: Contents in Label part are important
information of this product. Please keep them
properly for updating of software or providing
after-sales service.

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DEALER MANUAL FOR MOTOR
BF-DM-C-MM G333-EN November 2019
6.2 SPECIFICATIONS
①Motor model: MM G333.250.C
Rated power (W) 250
Rated voltage (V) 36 / 43 / 48
Waterproof IP65
Certification CE / ROHS / EN14766
Outdoor Temperatures -20℃~45℃
6.2.1 Outline and geometric size

4BF-DM-C-MM G333-EN November 2019
Chain line(CL): 53.5 mm
Shaft standard: BAFANG
6.2.2 Surface
Shockproof black coating
6.2.3 Storage Information
The pedelec should be stored in a ventilated humid and dry room. Avoid storing the pedelec near strong
magnetic objects.

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DEALER MANUAL FOR MOTOR
BF-DM-C-MM G333-EN November 2019
6.3 DRIVE UNIT INSTALLATION
6.3.1 List of Tools to be used
Do not use impact wrenches.
Use of the Tools Tools
To fasten screws onto the frame interface and the drive
unit
To fasten screws on the crank
To mount the bash guard and cover
Internal hex wrench
To fasten screws on the motor cover and cable cover T10 Torx screw driver
To lock and loosen the lock nuts on the chain wheel BAFANG tool
To fasten nuts onto the frame interface and the drive
unit
Socket spanner
(BAFANG: diameter=17.7mm,
length=63mm)
(OTHER: diameter <20mm, length
>35mm)
To connect the cabling BAFANG tool
BAFANG tool

6BF-DM-C-MM G333-EN November 2019
6.3.2 Install Drive Unit to Connection Interface
M8 bolt
M8 flat washer
M8 lock nut
Tool-socket spanner
A
C
B
D
Steps:
1) Align the Hole 1 on the frame interface with the mounting hole on the motor.
2) Rotate the motor anticlockwise around Hole 1, and align the Hole 2 and Hole 3.
3) Fasten 3 M8 bolts into Hole 1, 2, 3 from the right side to the left side.
4) Fasten the 3 M8 lock nuts with flat washers on the left of the frame, with tightening torque at 35 N.m.

7
DEALER MANUAL FOR MOTOR
BF-DM-C-MM G333-EN November 2019
6.3.3 Cabling
Male connector for power supply at the
drive unit
Female connector for power supply at the
battery
Male connector (6 pin) at the drive unit
Female connector (6 pin) for other device
Female connector (8 pin) at the drive unit
Male connector (8 pin) rear BUS cable
Male connector (8 pin) at the drive unit
Female connector (8 pin) at the front BUS
cable
A
B
a
b
C
c
D
d
Steps:
1) Link the female connector (8 pin) for EB-BUS “d” to the male connector (8 pin) at the drive unit “D”.
2) Link the male connector (8 pin) for EB-BUS “c” to the female connector (8 pin) at the drive unit “C”.
3) Link the power connectors together.
Note: Whether link 6 pin EB-BUS to drive unit is based on customer functional requirements.
6.3.4 Cable connector and method of using BAFANG tool
Steps:
1) Hold the cable connector with left hand.
2) Insert BAFANG tool into the bottom of the cable connector with right hand.
3) Insert BAFANG tool clockwise to make both fit together tightly.
4) Insert the unit into the corresponding position at the drive unit.
5) After inserting it into place, turn BAFANG tool counterclockwise and take it out.

8BF-DM-C-MM G333-EN November 2019
6.3.5 Bash Guard and Cover Installation
Hexalobular socket pan head
screw M3*8
Cover
A
B
Use a T10 Torx screw driver to tighten 3 M3*8 screws through hole sites on the covering case to the
frame interface, with tightening torque at 1 N.m.
Hexagonal socket head cap
screw M5*8
Bash guard
A
B
Use an internal hex wrench to tighten 4 M5*8 screws through hole sites on the bash guard to the frame
interface, with tightening torque at 4 N.m.

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DEALER MANUAL FOR MOTOR
BF-DM-C-MM G333-EN November 2019
6.3.6 Chain Wheel Installation
Chain wheel (Chain wheel
shall be made according to
orders of the customers)
Lock ring
BAFANG tool
A
B
C
1) Put the chain wheel onto the spline shaft of the drive unit.
2) Use BAFANG tool to fasten the lock ring onto the spline shaft, with tightening torque at 35 N.m.
6.3.7 Crank Installation
Left crank
Right crank
Hexagon socket screw
M8*P1*15
A
B
C

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1) After mounting the right crank on the right shaft.
2) Alternately fasten 2 M8*P1*15 screws with an internal hex wrench. (Note: Do not fasten them from
one side at a time.) Torque is 1.5 N.m.
3) Install the left crank in the same way. (Note: Please make sure two cranks are parallel.)
6.3.8 External Speed Sensor Installation
①Model: SR SD021.01
Speed sensor
Magnet for the speed sensor
A
B
1) Fasten the mounting screws through the speed sensor with a cross screwdriver.
2) Tighten the speed sensor onto the frame.
3) Place the rubber seal on the speed sensor hiding the screw. Torque requirement: 1.5 N.m- 2 N.m.
(Note: Place make sure the gap between the speed sensor and the magnetic unit is between 10 and 20
mm.)

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DEALER MANUAL FOR MOTOR
BF-DM-C-MM G333-EN November 2019
②Model: SR SD051.02
Rear flat fork
Speed sensor
A
B
1) Place the sensor in the mounting area of the rear flat fork.
2) Tighten the M5*12 countersunk head plum screw clockwise, and install the plug. (Torque: 3N.m.)
3) Install the magnet on the disc brake, and use a screwdriver to tighten 2 M5*12 countersunk head
plum screws. (Torque: 3 N•m.)

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6.4 MAINTENANCE
• Maintenance must be carried out by autho-
rized 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 com-
ponents protected.
• Avoid using high-pressure cleaning jets.
• For prolonged storage, turn off the battery
and avoid storing near heat sources.