Alternator problems

jayvee1980
Little Belter

Daf mad!!

Posts: 55

Alternator problems Nov 14, 2016 22:40:39 GMT

Quote

Post by jayvee1980 on Nov 14, 2016 22:40:39 GMT

I have an issue with my 66 which I hope someone can help with.

I noticed the other day that my lights had stopped flickering and the voltmeter was down about half way into the red. The alternator is still working because if I touch the regulator by the battery you can hear it whir and the engine tone drops. I have tried to adjust it, but it will only be on or off and when it's on the volt meter goes up into the danger red zone.

The volt meter has until now, always been in the middle of the green section when driving and the lights would always flicker. Is that normal?

Any advice would be gratefully appreciated.

1974 Daf 66 SL and another 1974 Daf 66 SL and a 1986 Volvo 340 DL CVT

macplaxton Technical Advisor Posts: 1,373	Alternator problems Nov 15, 2016 3:23:38 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by macplaxton on Nov 15, 2016 3:23:38 GMT Voltage regulator kaput?
	1972 DAF 44 Estate. Just the one DAF, honest.

andrewthe33
Bigger Belter

I don't know what you've done to me, sir, but you've done me the power of good!

Posts: 158

Alternator problems Nov 17, 2016 18:31:17 GMT

Quote

Post by andrewthe33 on Nov 17, 2016 18:31:17 GMT

The voltmeter sitting right in the middle of the green zone IS correct, but a digital voltmeter is the best thing to use when assessing the state of health of your car's electrics! The voltmeter half-way into the red means the alternator is not charging the battery properly, but even more of a problem is the voltmeter going into the red zone above the green-this will cook the battery and could cause a fire, aside from possibly damaging the alternator itself!

I also think the voltage regulator is damaged in some way, as it seems to be delivering either NO current to the battery or FAR too much. Repairing voltage regulators is a complex operation and best left to the experts, of which I know one! Whereabouts is your car and would the address & contact details of the experts help?

Major Denis Bloodnok IND Army (RET) Coward and Bar

Tuning Data
Model	Plugs gap	Points gap	Timing	In. valve	Ex. valve	Idle
33-> Jul'71	0.8mm	0.5mm	6 BTDC	0.1mm	0.15mm	725
33 Jul'71->	0.8mm	0.5mm	5 ATDC	0.1mm	0.15mm	900
44-> Jul'71	0.8mm	0.5mm	6 BTDC	0.1mm	0.15mm	725
44 Jul'71->	0.8mm	0.5mm	5 ATDC	0.1mm	0.15mm	900
55	0.6mm	0.5mm	TDC	0.15mm	0.20mm	700
55 Marathon	0.7mm	0.5mm	TDC	0.15mm	0.20mm	700
66 all 1108cc	0.7mm	0.5mm	TDC	0.15mm	0.20mm	725
66 1289cc	0.7mm	0.5mm	6 BTDC	0.15mm	0.20mm	725

Title 1
Here is the text content that you want to add. Here is the text content that you want to add. Here is the text content that you want to add. Here is the text content that you want to add. Here is the text content that you want to add. Here is the text content that you want to add.
Title 2
And here is some more text content. And here is some more text content. And here is some more text content. And here is some more text content. And here is some more text content. And here is some more text content. And here is some more text content.
Title 3
And here is some more text content. And here is some more text content. And here is some more text content. And here is some more text content. And here is some more text content. And here is some more text content. And here is some more text content.

Post by jayvee1980 on Nov 14, 2016 22:40:39 GMT

Post by macplaxton on Nov 15, 2016 3:23:38 GMT

Post by andrewthe33 on Nov 17, 2016 18:31:17 GMT