The belt that was on it was a 15A 1030, It run out of adjustment so I used a 15A 1015, now the adjustment is right in the middle.
I removed battery and the a/c pump out of the way (yes I refitted all the bolts to the pump when I refitted it
).It turns out that there was no adjusment left and the adjuster bolt was bent.
Before I did the belt the voltage was at (engine running at idle) 12.65 volts with everything on, after the belt change the voltage is now 13.8 volts (engine running at idle).
