50cc QMB139 Based Scooters Service Manual
Contents
1. A Electric Scooter Assembly A Electric Scooter Assembly Topic Page Topic Page Important Points The electrolyte diluted sulfuric acid is very toxic DO NOT allow acid to splash onto clothes the skin or eyes to protect them from burning Eye contact with acid may cause blindness In case of contact with the acid use a large amount of clean water to ush and rinse the areas in which the acid came into contact See a Physician immediately If the electrolyte acid gets into clothes it will permeate to the skin Remove tainted clothes immediately and then put them in water to rinse The batteries can withstand numerous cycles of charging and discharging as long as it is not left in a discharged condition for a long period of time If one of the batterie2. SCREW 3 60 45 CORSE SURFACE IN EX 30mm IN EX 32mm IN 24 5mm EX 27 5mm 32 VALVE SEAT SURFACE WIDTH VALVE SEAT SURFACE WIDTH 32 60 PDF processed with CutePDF evaluation edition www CutePDF com
3. ground with electric motor facing upwards 3 Using a flat head screwdriver cautiously pry the electric motor from the rear wheel rim 4 Lift and remove electric motor from wheel assembly 5 Loosen set screw securing collar to motor spindle 6 Remove and place collar set screw in secure place for reuse A Electric Scooter Assembly 1 Using the proper screwdriver or bit type and size carefully loosen each screw that is securing the motor cover 2 Remove each screw and set aside for reuse 3 Gently lift and remove the collar from the motor spindle Attention Removing the screws in a diagonal pattern is recommended to avoid stripping and damaging the screws and the threads Attention Exercise caution with the power cable when removing set collar Motor Disassembly A Electric Scooter Assembly 4 Once again using a flat head screwdriver carefully pry motor cover from the motor assembly Attention Use very mild and steady force when prying to avoid damaging motor housing and coils Attention Always exercise caution when using any tool to pry one surface from another 5 Gently lift and remove the motor cover from the motor assembly A Electric Scooter Assembly 1 Carefully lift and remove motor coil sub assembly from motor housing Attention Once again exercise caution when removing motor sub assembly to avoid damaging motor coils 2 Thoroughly inspect coils and coil wires f
4. 4 STROKE ENGINE SERVICE AND REPAIR MANUAL Model Numbers JL50QT 18 JL50QT X1 8 JL50QT 14 GY6 50cc JL50QT 18 JL50QT X1 8 JL50QT 14 7 AIR INLET TUBE AIR SCREW 2 3 IDLING SPEED ADJUSTMENT
5. ge 48V 6 Maximum speed gt 40 kg 18 W orking efficiency gt 72 7 Mileage per charge lt 40 kg 19 Battery Sealed free protective lead acid battery 8 Brake distance lt 4 5 m 20 Battery capacity 12V 17Ahx4 9 Brake ways M M 21 Charger American 10 Climbing ability gt 8 22 Tire 3 0 10 4PR 11 Max torque 20 N M 23 W heel Pressure FR R R 175 225 kpa 12 Max noise 64dB A Problem Cause Solution Scooter does not start No power Charge or replace battery batteries Battery connection poor Reconnect battery terminals Scooter runs weak Weak battery Recharge or replace batteries Scooter starts but does not move Motor inoperative Replace 750W motor Specifications Troubleshooting A Electric Scooter Assembly Dismantling and Removing Rear Wheel Assembly 1 Loosen and remove brake cable mount from Brake Arm Attention Exercise caution when loosening and removing cable tension spring 2 Loosen and remove brake cable tension spring from Brake Arm 3 Loosen and remove fasteners securing anti rotational bracket onto frame and rear wheel axle A Electric Scooter Assembly Dismantling the Rear Brake 4 Remove the adjusting nut of the rear brake 5 Remove the x bolt of the brake arm 6 Remove the brake arm 7 Remove the brake cam When Assembling the Rear Brake A Spread grease on the moving parts of the lining and of the x
6. ing Batteries A 16 Torque The nut of the rear wheel axle 10 0kg m 75ft lbs The top of the rear buffer 4 5kg m 30ft lbs The bottom bolt of the rear buffer 3 0kg m 20ft lbs The connection nut of the silencer 1 2kg m 10ft lbs The x bolt of the silencer 3 5kg m 25ft lbs Torque Settings A 2 Motor Inspection A 12 Battery Access and Power A 13 A Electric Scooter Assembly Perform regular maintenance on the following parts as the chart indicates C Clean L Lubricate I Inspect check fix replace when necessary Mileage km Frequency Item 124 200 621 1000 1864 3000 3107 5000 4972 8000 6215 10000 7458 12000 Controller C C Charger I I Front rear detent I I I Wheel bearing I I Front rear suspension I I Front fork bearing I I Tire I I Major side kickstand L L I All other body parts L L L I All screws amp nuts I I I I I Motor bearing I I If riding the vehicle in dusty or rainy areas perform maintenance more frequently Scheduled Maintenance A Electric Scooter Assembly No Description Specifications No Description Specifications 1 Product Size 1700x760x1180mm 13 Speed changing Automatic 2 Tread 1180 mm 14 Motor type B lushless motor 3 M inimum clearance from ground 110 mm 15 Rated power 750W 4 N W 90 kg 16 Rated current 22A 5 Load weight lt 80 kg 17 Rated volta
7. or damage Motor Inspection A Electric Scooter Assembly 1 Loosen and remove fasteners securing left and right side panels 2 Loosen and remove fasteners securing floor panels and panel beneath scooter seat 3 Carefully remove body panels as shown Attention Exercise caution when removing body panels and fasteners to avoid damage Battery Access and Power A Electric Scooter Assembly 4 Access battery power switch located in rear storage compartment of scooter 5 Remove power to motor by flipping the power switch to the OFF position Attention Be sure not to sperate the ground wire connections that are seperate for the connector Attention Confirm that power is removed from motor before beginning work on vehicle 6 Once power has been removed disconnect power connection to motor by carefully unclipping and seperating the wire connectors A Electric Scooter Assembly Attention Confirm that power is removed from motor before disconnecting and removing batteries 7 Loosen and remove fasteners securing battery restraining bracket 8 Remove bracket 9 Disconnect battery terminals Battery Access and Removal Attention Disconnect and reconnect positive terminal first followed by the negative battery terminal A Electric Scooter Assembly 10 Use a volt meter to check battery voltage as shown Recharging Batteries 1 Access charging input recepticle located inside sco
8. oter rear storage compartment 3 Allow batteries to continue charging until indicator shows that batteries are fully charged 2 Plug charger into charging recepticle as well as into wall outlet standard AC B Retro Model Scooter Panels C Scooter Panels
9. pin locating pin B Spread grease on the moving part of the brake cam shaft and then assemble it C Install the brake lining 8 Remove anti rotational brackets 9 Remove smaller restraining bracket 10 Remove restraining bolt A Electric Scooter Assembly 11 Assemble the wear indication board and the brake arm 12 Assemble the brake arm and the brake cam Attention Point the gullet mark of the brake arm to the dot mark of the brake cam and then assemble them 13 Install and tighten the bolt of the brake arm 14 Install and tighten the x bolt of the set arm 15 Install the return spring of the brake arm 16 Install the pin of the brake arm 17 Install the adjusting nut of the brake cable 18 Assemble the rear wheel refer to 13 2 19 Adjust the clearance of the brake lever refer to 13 8 A Electric Scooter Assembly 20 Slide rear wheel away from frame mounting slots 21 Slowly remove rear wheel from cam Attention Give particular attention to the power cable when removing rear wheel 22 Carefully loosen all four mounting bolts securing electric motor to rear wheel Attention The 750 watt electric motor is very heavy Exercise caution while removing motor mounting bolts 1 Loosen and remove four mounting bolts securing 750 watt motor to rear wheel Electric Motor Removal A Electric Scooter Assembly 2 Carefully place rear wheel onto
10. s are overcharged it can be detected by close inspection of the battery itself If the battery is exposed to an extreme overcharged condition it can break down and short circuit internally In this condition the battery will produce zero voltage under all load and charge conditions An overcharged battery can boil off the electrolyte solution This problem can be due to excessive time on a battery charger or a failed voltage regulator If the scooter is left to sit for a long time or is stored the battery will slowly discharge It is advisable to recharge the battery before attempting to start the scooter after a period of storage When lling a new battery with acid allow it to sit and breath for fteen minutes before installing it into the scooter or charging it It is advisable to charge a new battery after lling with acid even though it may appear to have suf cient charge When working on the scooter s electrical system make sure that the main switch is turned off and or the battery is disconnected Disconnecting and reconnecting of live circuits can cause high instantaneous currents that can damage the battery and cause injury Any short circuiting of the wiring can cause damage to the battery Important points A 2 Scheduled Maintenance A 3 Speci cations A 4 Troubleshooting A 4 Rear Wheel Dismantling A 5 Rear Wheel Removal A 5 Electric Motor Removal A 8 Motor Dissasembly A 10 Recharg
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