[TR] Question on installing a Delco 7127 style alternator on a TR4A

[Alan Myers]

 I used the same method as Dave to mount a 7127 to TR4.

The original generator adjusting bracket worked fine, after being flattened a
bit.

As I recall, I added a couple washers under the engine-mounted end of that
bracket and the lower one, to get the pulleys to line up perfectly.

I also ended up notching a little out of the alternator housing to be able to
more fully adjust the belt tension. There was plenty of material in the
casting, so I'm sure it didn't weaken it. One downside to this is that it
might not be usable for a core, if the alternator ever needs replacing... and
in which case the replacement would need similar modifications. It might be
possible to instead have the modified alternator rebuilt locally, though.

A side note for anyone replacing the TRactor engine generator or doing an
alternator conversion... While you have the car apart, I'm pretty sure one or
more of the bolts that holds the lower mounting bracket to the engine pierces
all the way through to the engine's water jacket. If that the vibrated loose
and dropped out, the coolant would dump out and the engine will overheat very
quickly and badly. Check that those bolts are secure! Or you might even
consider drilling them and adding safety wire as a precaution.



Alan Myers
San Jose, California
amfoto1 at aol.com
'62 TR4 CT17602L
www.triumphowners.com/640





-----Original Message-----


Hi Dave,



I installed a GM 10SI alternator in my TR4 a couple of years ago. I used

exactly the method you described for the bottom mount, i.e. the long bolt

and spacer thru the generator mounting bracket. For the upper tension

bracket I used the original TR bracket. I hammered out most of the offset to

make the bracket line up with the upper mount on the alternator. The whole

setup, including the switch to negative ground, has been pretty much

bulletproof.



Best of Luck,



Pete Fullam

CT19207L (o)



-----Original Message-----

From: triumphs-bounces at autox.team.net

[mailto:triumphs-bounces at autox.team.net] On Behalf Of Dave Connitt

Sent: Sunday, July 04, 2010 1:20 PM

To: Triumphs at autox.team.net

Subject: [TR] Question on installing a Delco 7127 style alternator on a TR4A



Hi List,

I am in the process of installing a Delco 7127 alternator on my TR4A IRS and

I

have a couple of questions. I realize these questions may have been answered

before but here goes and I apologize in advance for any repetition..

1. I am planning on using a  7 inch long 3/8 grade 8 bolt thru the bottom

"pivot bolt hole on the alternator which will allow me to run thru the front

of the alternator at the bottom, thru the front engine mounting plate, and

thru the stock generator mounting bracket with a small piece of pipe fit

inside the generator mounting bracket. This should give me a fairly stout

bottom mount.  Has anybody tried this? Does anybody know of a better way?

2. Where can I get a upper tension bracket that will work on this

installation? I have no idea where my original generator tensioning bracket

and I am not real sure if it would work anyway. I have seen some

installations

that have a chrome or stainless steel bracket which would be my preference

but

anything that works will be OK.



Thanks,

Dave Connitt

'67 Triumph TR4A IRS

http://home.fuse.net/davestr4a