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General Discussion / Kymco Maxer 4U issues
« on: December 11, 2019, 04:16:32 PM »
Hello this is my first post here and i hope it is in the correct place.
Basically i have a faulty Kymco Maxer 4U and am looking for advice. The mobility scooter is about 2 years old and
suffers from a few "showstopper issues". I have come to the forum since the local shop who supplied the machine is
clearly a "box-shifter" and has no service/technical skills to resolve the problems. He charged me $100 for a service in which he did nothing,
oher than spray WD40 on the axles , so i will have to sort it out myself.
The issues are as follow :-
1.)Pulling the forward and reverse lever does nothing for about a second or two before there is any forward or reverse motion. This is NOT how the scooter behaved when new. I mean there was no delay when the scooter was new.
2.)There is a lack of power and the scooter never seems to have full power although both batteries are new.
3.)One of the brushes appears to burn out very quickly and i have replaced it a few times, but the lifetime of the one located brush seems shorter than the rest. I mean the brush in the one position on the armature seems to burn out.
I am a fairly competent electronics engineer and have had a quick look "under the hood". All i really see of interest is a so called "S-drive" which i guess is a current controller for the obvious motor. The two batteries are wired in series and seem to deliver 48v , and seem healthy under load conditions.
My guess is it's the "s-drive" and it is not controlling the delivered current properly and perhaps it is damaging the brush mentioned earlier.
Sadly in the UK i see no sign of the service manual which would be very handy. I have heard rumors of a diagnostic device that plugs into the "dash" but have not seen any evidence of this physically myself.
Any help/guidance would be appreciated
Basically i have a faulty Kymco Maxer 4U and am looking for advice. The mobility scooter is about 2 years old and
suffers from a few "showstopper issues". I have come to the forum since the local shop who supplied the machine is
clearly a "box-shifter" and has no service/technical skills to resolve the problems. He charged me $100 for a service in which he did nothing,
oher than spray WD40 on the axles , so i will have to sort it out myself.
The issues are as follow :-
1.)Pulling the forward and reverse lever does nothing for about a second or two before there is any forward or reverse motion. This is NOT how the scooter behaved when new. I mean there was no delay when the scooter was new.
2.)There is a lack of power and the scooter never seems to have full power although both batteries are new.
3.)One of the brushes appears to burn out very quickly and i have replaced it a few times, but the lifetime of the one located brush seems shorter than the rest. I mean the brush in the one position on the armature seems to burn out.
I am a fairly competent electronics engineer and have had a quick look "under the hood". All i really see of interest is a so called "S-drive" which i guess is a current controller for the obvious motor. The two batteries are wired in series and seem to deliver 48v , and seem healthy under load conditions.
My guess is it's the "s-drive" and it is not controlling the delivered current properly and perhaps it is damaging the brush mentioned earlier.
Sadly in the UK i see no sign of the service manual which would be very handy. I have heard rumors of a diagnostic device that plugs into the "dash" but have not seen any evidence of this physically myself.
Any help/guidance would be appreciated