HER CHEE ADLY RT-50 Manuale utente
SERVICE MANUAL
RT-50
January 2008
High power Engine
HER CHEE INDUSTRLAL CO., LTD.
INTRODUCTION
This Service Manual is provided as the technical information
for the check & preparation of ADLY RT-50 scooter, and the
direction edited is given in diagrams with "Operation Sequence",
"Key Points", and "Adjustment of Check" for reference of the
service staffs.
This Service Manual is finished in accordance with the model
of RT-50. Taking new model as standard if there are differences
between the models described in this manual and the actual
scooter.
HER CHEE INDUSTRIAL CO., LTD.
CONTENTS
Chapter 01 Chapter 1 INFORMATION FOR PREPARATION………… 1
Chapter 02 CHECK AND ADJUST………………………………………….
Chapter 03 ENGINE REMOVAL…………………………………………….
Chapter 04 CYLINDER HEAD / CYLINDER / PISTON…………………..
Chapter 05 CRANK CASE & CRANK SHAFT…………………………….
Chapter 06 Transmission……………………………………………………
Chapter 07 Final Transmission Mechanism……………………………..
Chapter 08 Fuel System……………………………………………….........
Chapter 09 Front Wheel / Front Suspension / Front Brake……………
Chapter 10 Rear Wheel / Suspension / Brake……………………………
Chapter 11 Electrical Device………………………………………………..
Chapter1 InformationforPreparation
Attention on Operation
zAll washers, oil rings, clamp rings, opening pins shall be duly replaced by a new
item when dismounted.
zLocking of all screws, nuts, cross screws shall be performed in the order of first
the large screws and then the small ones and from inside to outside in opposite
angles by tightening the torque locks.
zAll items must use original parts, pure oil and greases.
zAll service shall use special tools and general tools to repair.
zAll dismounted items requiring for checks shall be duly cleaned and for assembly,
all items shall be duly lubricated.
Chapter1 InformationforPreparation
Attention on Operation
zCertified lubricants in cans shall be used on all the elements to be lubricated.
zAfter assembly, performance of all elements shall be duly checked and the
locking shall be duly verified.
zIn case of an operation is performed by over 2 people, the assignment shall be
conducted in coordination and safety shall be the first priority.
zDefinition of signs:
The sign given in the Service Manual shall refer to the operation methods and
observation.
OIL: Lubrication by designated lubricant.
GREASE: Lubrication by grease
Special Tool: Parts on which special tools shall be
used
General Tool: General tools shall be used
New: Replace by new items after dismounting
Attention
Dangerous and important operations
Chapter1 InformationforPreparation
SPECIFICATION
TYPE RT 50
LENGTH 1585mm
WIDTH 700 mm
HEIGHT 960 mm
WHEEL BASE 1070 mm
NET WEIGHT
ENGINE TYPE 2-STROKE, Single Cylinder
COOLING AIR COOLED
DISPLACEMENT 49.26 C.C.
BORE×STROKE 40.0×39.2
COMPRESSION RATIO 7.2:1
IGNITION C.D.I
STARTER ELECTRIC / KICK
SUSPENSION Hydraulic Shock Absorber
TRANSMISSION AUTOMATIC
TIRE
FRONT/REAR Front 120/90-10 (Option
Rear 120/90-10 (Option
FRONT BRAKE Disc
REAR BRAKE Drum
Chapter1 InformationforPreparation
LOCKING TORQUE
Adopt the standard torque locking for the item unlisted.
STANDARD TORQUE：
Type Locking Torque (kg-m)
5 mm Screw 0.4
6 mm Screw 1.0
6 mm Hex Washer Face Bolt / Nut 1.2
8 mm Hex Washer Face Bolt / Nut 2.7
10 mm Hex Washer Face Bolt / Nut 4.0
CHASSIS：
Locking Place Quantity Dia. (mm) Locking Torque (kg-m)
Spanner Nut of Handle Steering
Steam 1 25 7.0
Front Wheel Axle Nut 1 10 4.5
Rear Axle Nut 1 14 11
Rear Brake Arm Screw 1 5 0.6
Upper Screw of Rear Shock Absorber 1 10 4.0
Lower Screw of Rear Shock Absorber 1 8 2.7
Engine Mounting Bracket 1 8 6.0
ENGINE：Locking Place Quantity Dia. (mm) Locking Torque
(kg-m)
Screw of Cylinder Cap 4 6 1.0
Flywheel Nut 1 10 3.8
Clutch Jacket Nut 1 11 3.8
Driving Disc Nut 1 28 5.5
Nut of Transmission Disc 1 10 3.8
Oil-check Screw 1 8 1.3
Joint Screw of Exhaust Manifold 2 6 1.2
Exhaust Pipe Support Screw of
Muffler 2 6 1.2
Spark Plug 1 14 1.4
Bolt of Crank Shaft Case 6 6 10
Bolt of Engine Installation 1 8 5.0
Chapter1 InformationforPreparation
The following drawing that shows the disassembling situation of the cover parts for
RT50 scooter.
Chapter1 InformationforPreparation
normal abnormal
INFORMATION FOR PREPARATION
REVOLUTION NOT STABLE (LOW R.P.M.)
Diagnose Check and Adjust
adjusting is correct adjusting isn't
correct
no sucking air sucking air
sparking normal sparking abnormal
normal abnormal
ignition timing adjusting
adjust the carburetor fuel
adjuste screw
carburetor sucking air
loosen spark plug,
connecct with spark cap
and contract with frame,
check the spark plug
sparking ?
check A.C.G
end
Reason of Trouble
C.D.I damage
pulser coil damage
mixture gases too lean
(loosing screw)
mixture gases too rich
(locking screw)
spark damage or stain
C.D.I damage
A.C.G damage
coil damage
spark plug cable damage odr short
main switch damage
A.C.G damage
air hole damage or blocking
(-) pressure tube damage
gasket damage
the screw of carburetor is
loosen
(-) pressure tube broken
Chapter1 InformationforPreparation
normal abnormal
INFORMATION FOR PREPARATION
REVOLUTION NOT SMOOTH(HIGH SPEED)
Diagnose
Check and Adjust
normal abnormal
normal abnormal
no blocking blocking
valve timing is
correct valve timing isn't
correct
adjusting ignite timeing
adjusting valve gap
check fuel cup supply
normal ?
carburetor blocking
check and adjust valve
timing
Reason of Trouble
C.D.I damage
ACG pulse coil damage
fule filter blocking
air hole of fuel tank blocking
fuel cup damage
fuel of tank is too less
camshaft gear mark position is not
correct
normal spring broken or
elastic deformation
end
check the spring of valve
adjusting isn't correct
valve set damage
cleaning
spring damage
Indice
