1965 C337 "Alternator not charging" light

DrDave · #1 02-22-19, 12:20 AM

Hi:

There is going to be an avionics master switch on the panel. It will go from a breaker on the main bus to the switch and then back to power the shorter avionics bus on the lower row of the panel. There are two separate buses on the bottom row. There is an empty breaker next to the avionics bus that will feed the avionics master switch and bus. BTW, that narrow jumper will carry 105 amps.

I do not recall the size of the lugs on the starter. I will look tomorrow and let you know. Do you have the crimp tool for the larger size lugs? As I recall that was a $350 investment in that crimper.

Dave

cessnadriver · #2 02-22-19, 09:15 AM

Dr. Dave. I found that Harbour Freight has a hydraulic crimper 14-0 AWG. The price is $55. Will you install a relay between the main to avionics bus? I installed one on my Cessna 172 to avoid pushing high amps through a switch?
Thanks for the reply.
Regards, BILLS

DrDave · #3 02-22-19, 05:21 PM

I'm skeptical of the quality of that crimper. If you save the $55 and measure and mark your wire you could send it to me and I'll crimp it for you. I'll even label it and shrink tube the terminals. I have the terminals too. I'm guessing it will be around 15' of wire.

I have no plans to put a relay in the circuit. There is no large load on the circuit. The only load even worth mentioning is during transmit. It's <5 amps. I will be using a Cuttler-Hammer switch. I can't remember the part number right now. I'll look it up.

Dave

cessnadriver · #4 02-22-19, 09:00 PM

Dr. Dave.
Thanks for the heads-up on the crimper. BUT I already bought one to try. Thank you for the offer to crimp my wires-though. I have another option there is a company there that I use to work for that does a LOT of wire crimping, aviation standard stuff. I could have them crimp them if needed!
Regards, BILLS

DrDave · #5 02-23-19, 12:12 AM

That sounds like a very good option. When you fit your wires mark a line on the wire for alignment of the terminal. This is important on the larger wires. Send pictures.

I just added a few pictures for you. This is the type of crimper you want to use. I also included a crimped connector to show what the finished crimp should look like.

Dave

cessnadriver · #6 03-07-19, 09:25 AM

Dr. Dave. Would you be willing to give me your e-mail address? I have a few questions and it would be great to e-mail you directly? IF not one of the questions is. You want me to replace the 12 gauge (the original gauge) wire to a 8 gauge? From the alternators to the shunts and from the shunts to the circuit breakers? If so this would be a modification to the original wiring REQUIRING a Form 337 "Major Alteration/Repair" approval? PLEASE ADVISE! My email address is bstory@pa.rr.com.
Many thanks, BILLS

JAG · #7 04-01-19, 11:14 AM

Hi Dr. Dave,
Well, I have also taken your advice from this thread, and I have started to run the new wires from the starter (GND) to starter, and new feed wires. As I am going through a major refit on the aircraft including avionics, I thought I would have another look at the back of the CB panel to see where I would install some new CBs...well, I did not sleep well last night thinking about the 1966 panel that has been added to over the years. I have resigned myself to the fact I just need to clean it all up. This will be a big job - and I am hoping to get any guidance/templates/words of wisdom from you on making this a modern install. I have looked at your pictures and like what I see. Do you have some info you could share on the layout, copper bus bars, etc that you did in designing yours. I was hoping to keep the same Front Panel, but I may have to fabricate a new one to accommodate the new CBs and also have the front properly marked. I still have your phone # from when you helped me out with the rudder bar bearing block...let me know if you want my personal email.
Jeff