Note the 1/4" aluminum plate bolted onto the rear of this 7074 Ford 100 amp alternatorThe plate has 12 rectifiers (diodes)These are negative rectifiersUnseen within the case are 12 positive rectifiers. 24 totalThe original had six total rectifiers 3+3Notice the rear bearing. It has a nipple on the end to hold more greaseHeads up performance versus a Nippondenso hairpin alternator leaves this one in the dustYet the rectifiers in the Ford are light years more durable than those in the NippondensoThere are few "free lunches" in the alternator design deptI have redesigned and built more than two dozen special purpose alternatorsI am all too familiar with what can and cannot be done mechanically, electrically, and durbility-wise

this for Marine use ?maximum reliability ?

It serves as an example. It is a 160 amp alternator.Two shortcomings with the Ford 70-100 amp alternator seriesVery short brushes. Part of the brush holderOriginal has a 6203 front (DE) bearing -- inferior for heavy serviceOEM has gone to larger 6303 bearing on newer altsI do not know if unit shown has an upgraded drive end frame to use the 6303 bearing.The two screws near the regulator plug _May Be_ for the brushes. The field connection. Insulated brushes can be connected to an A or to a B circuit voltage regulator.The 5/16" bat bolt on the right looks like it is insulated, making it the + bolt. The one one the left looks like a chassis negative bolt being it's not insulated from the case.When I was building these things, I had Saint Mary's Carbon build graphite copper brushes that were 5/32" longer than the originals. The absolute longest possible. The brush retaining pin slid across fully depressed brushes during assembly.

SOME GM DELCO ALTERNATOR PERFORMANCE CURVES

Looks good. Two of those bolted on to the Hemi and a 3000 watt psw inverter, I could run my trailer air while driving - no more climbing into an oven when stopping for the night.

i used to use truck alternators on my vehicles in the 70's and 80's. that was before the automotive manufacturers got smart and started to install higher amp alternators. Leece Nevill and delco remy

An Image Of A Properly Designed High Amp Alternator

GordonThree
Explorer
Jan 21, 2018
Looks good. Two of those bolted on to the Hemi and a 3000 watt psw inverter, I could run my trailer air while driving - no more climbing into an oven when stopping for the night.
MEXICOWANDERER
Explorer
Jan 21, 2018
SOME GM DELCO ALTERNATOR PERFORMANCE CURVES
MEXICOWANDERER
Explorer
Jan 21, 2018
It serves as an example. It is a 160 amp alternator.

Two shortcomings with the Ford 70-100 amp alternator series

Very short brushes. Part of the brush holder
Original has a 6203 front (DE) bearing -- inferior for heavy service
OEM has gone to larger 6303 bearing on newer alts
I do not know if unit shown has an upgraded drive end frame to use the 6303 bearing.

The two screws near the regulator plug _May Be_ for the brushes. The field connection. Insulated brushes can be connected to an A or to a B circuit voltage regulator.

The 5/16" bat bolt on the right looks like it is insulated, making it the + bolt. The one one the left looks like a chassis negative bolt being it's not insulated from the case.

When I was building these things, I had Saint Mary's Carbon build graphite copper brushes that were 5/32" longer than the originals. The absolute longest possible. The brush retaining pin slid across fully depressed brushes during assembly.
MrWizard
Moderator
Jan 21, 2018
this for Marine use ?
maximum reliability ?

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An Image Of A Properly Designed High Amp Alternator

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