oakleyb
Well-Known Member
I'm just in the process of fitting my Yanmar 3ym30 ae and noticed the 120 amp alternator doesn't have a dedicated BAT connection - anyone fitted one of these engines
New Yanmar
- Thread starter oakleyb
- Start date
Spi D
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RichardS
N/A
Is the alternator the usual Hitachi manufactured one? My 3YM30s are both Hitachi 80A and have the large +ve BAT terminal near the T connector. Something has obviously been changed on the 120A version but if it is Hitachi it would help to pin down the connectors.
Richard
oakleyb
Well-Known Member
Hi thanks for the replies, not sure of the make - the manual shows an alternator with obvious BAT connector, this isn't the case with new 3ym and 125 amp alt
RichardS
N/A
The manufacturer's name should be embossed on the back or side and a label on the side might also give the same info plus a model number unless its been removed. You can then look online for the actual model and should find all the connection information.
Richard
Ceirwan
Well-Known Member
If its anything like my 1GM then the negative is earthed to the engine, and the positive comes from the positive terminal on the starter motor.
RichardS
N/A
My understanding is that the OP doesn't have a terminal on the alternator with BAT alongside it so doesn't know which terminal to connect the positive to. Presumably there isn't one with a big + sign either.
Richard
oakleyb
Well-Known Member
OK I've had a look, its a Valeo part number 128990-77250 - looking at the cables I will end up with a starter battery connected to starter motor which in turn is connected to the alt, can I supply split charge relay from here ?
