Hyena MRT-A250 User manual

Product Manual
MRT-A250
Original Instruction
Version 220818
Copyright © 2022 HYENA INC. All Right Reserved.

HYENA E-BIKE SYSTEMS
Table of Contents
Introduction
Product Features
Product Description.............................................................................................1
Parts Description .................................................................................................1
Product Dimension..............................................................................................2
Technical Data
Function ................................................................................................................4
Characteristic .......................................................................................................4
Mounting Parameter ...........................................................................................5
Connection ...........................................................................................................5
Certification ..........................................................................................................5
Mounting
Tool List.................................................................................................................6
Accessory List......................................................................................................6
Mounting Instructions .........................................................................................7
Safety Instructions
Important Notice ..................................................................................................9
Moving and Storage Instructions ......................................................................9
Maintenance.........................................................................................................9
Disposal ................................................................................................................9

HYENA E-BIKE SYSTEMS
1
Introduction
This manual is intended primarily for the trained technician to install, disassemble, or maintain the Hyena e-bike system
only. Please read all the safety warnings and instructions carefully. Failure to follow the warnings and instructions may
result in death or severe injuries. Save this manual for future reference.
Product Features
Product Description
The MRT-A250 rear hub motor provides power for the e-bike. In addition, it features an excellent torque/weight ratio,
compact size, and is maintenance-free.
Parts Description
*Item D can be replaced by a Flat washer and a Hex nut.
Item
Description
Item
Description
A
Cover for disc mount plastic seal
E
Nut cap
B
M5 Disc screw (Button head socket screw)
F
Cassette mounting base
C
Torque washer
G
Motor cable
D*
Flange nut
A
C
D
D
E
E
B
C
G
F

HYENA E-BIKE SYSTEMS
2
Product Dimension
PN: 56R034, 56R037 (O.L.D. 120mm)
Item
Dimension
A
18xΦ3.2 (PCD=128)
B
Φ141.0
C
Φ33
D
10
E
15±0.5
F
40
G
23.5±1
H
9
I
1
J
120±1
K
181±2
L
(WL) 220±10
M
35
N
Φ10
+0.2
-0
0
-0.15
Unit: mm

HYENA E-BIKE SYSTEMS
3
PN: 56R009, 40010M21B, 40010M21C (O.L.D 135mm)
Item
Dimension
A
18xΦ3.2 (PCD=128)
B
Φ141.0
C
Φ33
D
10
E
11.3±0.4
F
40
G
38.7±0.6
H
9
I
5.6
J
135±1
K
195±2
L
(WL) 180
M
35
N
Φ10
+0.2
-0
+0.2
-0.15
Unit: mm

HYENA E-BIKE SYSTEMS
4
Technical Data
Function
Rated power
250 W
Rated voltage
36 V
Wheel size
26-28 inches
Max. speed
25 km/hr
Max. torque
40 Nm
Max. RPM (w/o loading)
230 ± 5%
Max. current @ max. RPM (w/o loading)
≤ 1.7 A
Max. noise @ max. RPM (w/o loading)
< 60 dB
Max. efficiency
≥ 78 %
Weight
2.7 kg (5.95 lb)
Waterproof level
IPX4
Hall sensor
Yes
Speed sensor
Yes
1 Magnet
Temperature sensor
N/A
Characteristic
Protocol
N/A
Control type
Sine wave
Reduction ratio
1:5.2
Operating temperature
-10℃~+40℃80%RH
Storage temperature
-20℃~+70℃80%RH
Insulation
≥ 50 MΩ

HYENA E-BIKE SYSTEMS
5
Mounting Parameter
Mounting position
Rear wheel
Outer dimension
141 mm
Shaft length
197 mm
O.L.D (over-locknut dimension)
120 mm/135 mm
PN. 56R009, OLD=135mm
PN. 56R034, OLD=120mm
PN. 56R037, OLD=120mm
PN. 40010M21B, OLD=135mm
PN. 40010M21C, OLD=135mm
Axle type
10 mm
Spoke hole
36 H
Spoke hole type
13G
Brake type
Disc brake BCD 44 mm, 6 bolts
Freewheel type
Freewheel 6-7 speed
Cable outlet
Drive side
Cable length
180mm or 220 mm
PN. 56R009, Cable =180mm
PN. 56R034, Cable = 220mm
PN. 56R037, Cable = 220mm
PN. 40010M21B, Cable=180mm
PN. 40010M21C, Cable=180mm
Standard connector
JL-F-Z910AG
Connection
N/A
Certification
EN 15194:2017
Yes
CE
Yes
RoHS
Yes

HYENA E-BIKE SYSTEMS
6
Mounting
Tool List
Open-ended wrench M17, M18
Hexagon key M5
Freewheel tool (freewheel remover)
Accessory List
Flange nut (2 pcs)
Torque washer (2 pcs)
Nut cap (2 pcs)
M12xP1.25xt10mm
OD20XID12xW10xt4
OD26xID17.5x29mm
Plastic gasket (1 pc)
(attached on the motor)
Button head socket screw
(6 pcs) (attached on the motor)
OD56xID34xt2mm
M5x7mm

HYENA E-BIKE SYSTEMS
7
Mounting Instructions
• Use the proper bicycle tools during the installation or removal process.
• Carefully installing this product is necessary, do not strike it with any tool such as a hammer or wrenches.
• CAUTION! Please strictly follow these steps for assembly; otherwise, an incorrect assembly may cause permanent
damage.
• NOTE: The bike image in the manual may be different from the actual bike, but will be enough to help you understand
related instructions.
Exploded View of Assembly
Installation
Install and fasten the threaded freewheel (right side).
Remove the screws and plastic gasket from the motor
(left side).
STEP
1
STEP
2

HYENA E-BIKE SYSTEMS
8
Install the disc, then replace and fasten the screws.
Insert the torque washer through the motor shaft
(washer bulge aligns with the flat side of the shaft).
Install the motor (rear wheel).
Insert the flat washer and fasten the hex nut then
install the nut caps.
Complete the installation.
STEP
3
STEP
5
STEP
6
STEP
7
STEP
4