This section makes it possible to find the solutions to use in troubleshooting.
For each breakdown, a list of the possible causes and respective interventions is given.
Engine
Poor performance
POOR PERFORMANCE
Possible Cause
Operation
Defective fuel pump or damaged depression line
Replace the pump or control lines
Carburettor nozzles clogged or dirty
Dismantle, wash with solvent and dry with compressed air
Fuel filter on the tank outlet fitting dirty or clogged
Clean the fitting filter
Excess of encrustations in the combustion chamber
Remove the encrustations
Lack of compression wear of the piston rings or cylinder
Check the worn parts and replace them
Exhaust pipe clogged due to excessive encrustations
Replace the exhaust pipe and check the carburation and mixer
timer
Air filter blocked or dirty
Clean according to the procedure
Starter inefficient (stays on)
Check the mechanical sliding, continuity of the circuit, the pres-
ence of power and electrical wiring
Clutch slipping
Check the centrifugal brake shoe assembly and /or clutch bell
and replace if necessary
Defective mobile pulley sliding
Check the parts, change the faulty parts and lubricate the driv-
en pulley using only Montblanc-Molibdenum Grease (dis.
498345) grease
Transmission belt worn
Replace
Roller wear; Presence of oil; Dirt
Clean the speed variator, replace the rollers if worn out
Rear wheel spins at idle
REAR WHEEL
Possible Cause
Operation
Idling rpms too high
Check the idling speed and, if necessary, adjust the C.O.
Clutch fault
Check the spring/friction mass and the clutch bell
Air filter housing not sealed
Correctly refit the filter housing and replace it if it is damaged
Starting difficulties
DIFFICULTY STARTING
Possible Cause
Operation
Carburettor nozzles clogged or dirty
Dismantle, wash with solvent and dry with compressed air
Defective fuel pump or damaged depression line
Replace the pump or control lines
Starter inefficient
Check: electric wiring, circuit continuity, mechanical sliding and
power supply
Battery flat
Check the state of the battery. If it shows signs of sulphation
replace it and bring the new battery into service charging it for
eight hours at a current of 1/10 of the capacity of the battery
itself
- Engine flooded.
Start up keeping the throttle fully open alternating approximate-
ly five seconds of turning it with five seconds still. If however it
does not start, remove the spark plug, the engine over with the
throttle open being careful to keep the cap in contact with the
spark plug and the spark plug grounded but away from its hole.
Refit a dry spark plug and start the vehicle.
Altered fuel characteristics
Drain off the fuel no longer up to standard; then, refill
Defective spark plug or with incorrect electrode gap
Remove the encrustation, restore the plug gap or replace being
sure to use the types of spark plug recommended at all times.
Troubleshooting
DNA 50
TROUBL - 36
Содержание DNA 50
Страница 1: ...WORKSHOP MANUAL 633507 DNA 50 ...
Страница 4: ......
Страница 6: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Страница 16: ...INDEX OF TOPICS TOOLING TOOL ...
Страница 25: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Страница 35: ...INDEX OF TOPICS TROUBLESHOOTING TROUBL ...
Страница 41: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Страница 44: ...Ignition 1 Electronic ignition device 2 Sparkplug 3 Magneto 6 Key switch Electrical system DNA 50 ELE SYS 44 ...
Страница 58: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Страница 60: ...Engine from vehicle DNA 50 ENG VE 60 ...
Страница 61: ...INDEX OF TOPICS ENGINE ENG ...
Страница 92: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Страница 99: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Страница 107: ...INDEX OF TOPICS COOLING SYSTEM COOL SYS ...
Страница 113: ...INDEX OF TOPICS CHASSIS CHAS ...
Страница 121: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...
Страница 125: ...INDEX OF TOPICS TIME TIME ...
Страница 127: ...Crankcase CRANKCASE Code Action Duration 1 001133 Engine crankcase Replacement DNA 50 Time TIME 127 ...
Страница 139: ...Brake shoes BRAKE SHOES Code Action Duration 1 002002 Rear brake shoe s Replacement DNA 50 Time TIME 139 ...
Страница 154: ...Swing arm SWINGING ARM Code Action Duration 1 001072 Engine frame swinging arm fitting Replacement Time DNA 50 TIME 154 ...