Author Topic: P30 464 Chieftain Alternator Woes  (Read 73 times)

Offline PaulLofthouse

  • *
  • Posts: 4
  • A Brit, in Michigan with a Winnie named Wanda
  • I own: a Motor Home
  • Year: 1986
  • Make: Winnebago
  • Model: Cheiftain 23
  • Chassis: Chevy P30
  • Engine: 464
P30 464 Chieftain Alternator Woes
« on: July 09, 2019, 03:38 PM »

Hi All.


So, just picked up our 86 Winnie, that has 'just' had a new alternator fitted.  Like literally before we drove it home.  Guess what, its not charging.  I don't think the guy had a clue to be honest.


Anyway, true enough, no charge coming from the back of the alternator - its just sat at 12.2.


The new shiny alternator is the 7924 GM, and the old one is the lestek 9135M 105 Amp.


I thought the 7924 was an SI with the regulator built in, but the old lestek was externally regulated...   it looks like the wiring loom has been butchered, and im trying to work out whether the regulator is needed or not.



Am I right?



Thanks everyone!
Paul



Offline Rickf1985

  • *
  • Posts: 5359
  • Member since: 2013
  • I own: a Motor Home
  • Year: 1989
  • Make: Winnebago
  • Model: Chieftain
  • Chassis: Chevy
  • Engine: 454
Re: P30 464 Chieftain Alternator Woes
« Reply #1 on: July 09, 2019, 04:41 PM »
The alternator that belongs in there would be internally regulated and would have been a standard GM alternator. The Lestak was an add on as was the regulator if it had one. A Lestak 9135 is a dual output 135 amp alternator that is set up for charging the house batteries on one output and the chassis battery on the other output. The factory wiring may actually still be hiding down in there somewhere for the original alternator.

Offline PaulLofthouse

  • *
  • Posts: 4
  • A Brit, in Michigan with a Winnie named Wanda
  • I own: a Motor Home
  • Year: 1986
  • Make: Winnebago
  • Model: Cheiftain 23
  • Chassis: Chevy P30
  • Engine: 464
Re: P30 464 Chieftain Alternator Woes
« Reply #2 on: Today at 05:22 PM »

Thank you!


So, the new Alternator that's in there is a GM 7924. Picture of it installed is attached.  Just for clarification, anyone know if this is internally regulated, or does it need a regulator?


p

Offline TerryH

  • Full-time Adventurer!
  • *
  • Posts: 743
  • Member since: 2013
  • I own: a Motor Home
  • Year: 1992
  • Make: Winnebago
  • Model: Brave 27RC
  • Chassis: GMC P30
  • Engine: 454 Dual Fuel
Re: P30 464 Chieftain Alternator Woes
« Reply #3 on: Today at 05:35 PM »
A Brit, in Michigan with a Winnie named Wanda

Sounds 'fishy' to me! :)rotflmao :)rotflmao
Two wrongs don’t make a right, but they make a good excuse.
-Thomas Szasz  1973   (1920 - 2012)

Offline PaulLofthouse

  • *
  • Posts: 4
  • A Brit, in Michigan with a Winnie named Wanda
  • I own: a Motor Home
  • Year: 1986
  • Make: Winnebago
  • Model: Cheiftain 23
  • Chassis: Chevy P30
  • Engine: 464
Re: P30 464 Chieftain Alternator Woes
« Reply #4 on: Today at 05:41 PM »

lol -  The missus came up with the name - I promptly had to introduce her to the film :)

Offline PaulLofthouse

  • *
  • Posts: 4
  • A Brit, in Michigan with a Winnie named Wanda
  • I own: a Motor Home
  • Year: 1986
  • Make: Winnebago
  • Model: Cheiftain 23
  • Chassis: Chevy P30
  • Engine: 464
Re: P30 464 Chieftain Alternator Woes
« Reply #5 on: Today at 05:59 PM »
Guys, In addition to the above question regarding whether the alternator fitted is an SI unit, or needs a regulator, can anyone tell me what the isolator above the alternator is?

The one in the battery box is operated when the Momentary switch is pressed, is this one pictured operated when the rocker is set to Dual?




Offline Rickf1985

  • *
  • Posts: 5359
  • Member since: 2013
  • I own: a Motor Home
  • Year: 1989
  • Make: Winnebago
  • Model: Chieftain
  • Chassis: Chevy
  • Engine: 454
Re: P30 464 Chieftain Alternator Woes
« Reply #6 on: Today at 07:14 PM »
Yes, the alternator is internally regulated and there should be a two wire flat plug that goes on that connector on the bottom of the unit. The solenoid is the starter assist solenoid.

Here is a diagram of the alternator where you can see the wires that go to that plug. One is a small brown wire #25 and the other is usually a slightly larger red wire #2. You can rig these up if you have to if you can't find the original plug.


 

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