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Re: Generator head replacement

Reply #50 –
Justin, I'm using a new one that came with the power head . It he connections look straight forward. I sent you a pm.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Generator head replacement

Reply #51 –
The original PT 10KW has two leads marked E1 and E4, does your new generator have these leads?
Justin & Cathy Byrd
1995 U280 "Old Faithful"
36' Build #4673
C8.3 Cummins
Allison MD3060R 6 speed - retarder
Powertech 10KW  4cyl Kubota

Re: Generator head replacement

Reply #52 –
No, T1-T4 ftm main winding, regulator connections field +and-, R3and R4. As shown previously a dip sw on he regulator for 120 or 240.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Generator head replacement

Reply #53 –
Quote from: bbeane –
No, T1-T4 ftm main winding, regulator connections field +and-, R3and R4. As shown previously a dip sw on he regulator for 120 or 240.
Bruce, this is to satisfy my own curiosity:
When wired for 240VAC what would be the voltage from Line 1 OR Line 2 to Line 0?
1992 Foretravel Grand Villa
U225 SBID Build No. 4134
1986 Rockwood Driftwood
1968 S.I.A.T.A. Spring
1962 Studebaker Lark
1986 Honda VF700C
1983 Honda VF750C
Charlie, the Dog was broken out of jail 24 Oct 2023
N1RPN
AA1OH (H)e who must be obeyed.

Re: Generator head replacement

Reply #54 –
Quote from: Old Toolmaker –
Bruce, this is to satisfy my own curiosity:
When wired for 240VAC what would be the voltage from Line 1 OR Line 2 to Line 0?

I don't understand your  question. If you are talking about line 0 being ground it would be 120 on each side. If you are saying accross each other 240
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Generator head replacement

Reply #55 –
Quote from: bbeane –
I don't understand your  question. If you are talking about line 0 being ground it would be 120 on each side. If you are saying accross each other 240
Bruce, that's exactly what I was asking.  So the Power Tech generator coaches can be wired just like any American house.
Cool!
Thanks for the information!
1992 Foretravel Grand Villa
U225 SBID Build No. 4134
1986 Rockwood Driftwood
1968 S.I.A.T.A. Spring
1962 Studebaker Lark
1986 Honda VF700C
1983 Honda VF750C
Charlie, the Dog was broken out of jail 24 Oct 2023
N1RPN
AA1OH (H)e who must be obeyed.

Re: Generator head replacement

Reply #56 –
Quote from: Old Toolmaker –
Bruce, that's exactly what I was asking.  So the Power Tech generator coaches can be wired just like any American house.
Cool!
Thanks for the information!
when you are plugged into a properly installed 50amp rv plug you are plugged int 240 just like your house. CAUTION NOT ALL POWERTECH GENERATORS CAN BE WIRED 240. Don't attempt ANY modifications to a powertech generator without contacting JEFF JONES at powertech first.

I'm replacing my powertech generator head with a Marathon head. It is the same basic  dimensions, it is wired differently it has 8 leads 4 for the regulator, 4 for the voltage connections. He old powertech head has 10 leads all different connections.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Generator head replacement

Reply #57 –
Here of the official explanation of how a generator works
Think of T1-T2 an T3-T4 coils as 12V batteries. T1 & T3 are "+" and T2 & T4 are "-".
You can series them for 24V by tying 2-3 and get 12V only by 1-3, 2-4.
If you tie 2-3 for 24V circuit, you can still get 12V from each battery. 1-2 = 12V, 3-4 = 12V  and 1-4 = 24V.  Look at the +/- locations though.
The ground point is the midpoint for the 120/240 option and the "-" lead as an arbitrary convention for 120V only.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Generator head replacement

Reply #58 –
Quote from: bbeane –
Here of the official explanation of how a generator works
All of that being said, L1 and L2 are 180ยบ out of phase to each other giving 240 when combined and no current on L0.  To the best of my knowledge when one load is from L1 and another from L2 those two loads also cancel out any return current on L0.  It's only when you run all loads on L1 and L2 that there is return current on L0.
1992 Foretravel Grand Villa
U225 SBID Build No. 4134
1986 Rockwood Driftwood
1968 S.I.A.T.A. Spring
1962 Studebaker Lark
1986 Honda VF700C
1983 Honda VF750C
Charlie, the Dog was broken out of jail 24 Oct 2023
N1RPN
AA1OH (H)e who must be obeyed.

Re: Generator head replacement

Reply #59 –
Generator runs, wired 120. All is good glad that job is done. Little over 3 coach bucks.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Generator head replacement

Reply #60 –
Sort of..... the neutral carries the unbalanced load (difference) between L1 & L2 on a single phase 120/240 circuit.

Not practical and nearly impossible to balance all of your 120v loads to have zero current on the neutral. 
Justin & Cathy Byrd
1995 U280 "Old Faithful"
36' Build #4673
C8.3 Cummins
Allison MD3060R 6 speed - retarder
Powertech 10KW  4cyl Kubota

Re: Generator head replacement

Reply #61 –
Quote from: FourTravelers –
Sort of..... the neutral carries the unbalanced load (difference) between L1 & L2 on a single phase 120/240 circuit.

Not practical and nearly impossible to balance all of your 120v loads to have zero current on the neutral. 

Yeah, that.  I went back and fixed the conjunction leaving the assumption to be made that "all loads" equal the same total power on each side of L0.

My point was that in use, wired as a standard US house THAT DESIGN PowerTech alternator only delivers 240VAC when the load is wired in properly and provides two legs of 120 VAC in normal operation and less that total return current in operation thanks to the magic of phase shift technology.
1992 Foretravel Grand Villa
U225 SBID Build No. 4134
1986 Rockwood Driftwood
1968 S.I.A.T.A. Spring
1962 Studebaker Lark
1986 Honda VF700C
1983 Honda VF750C
Charlie, the Dog was broken out of jail 24 Oct 2023
N1RPN
AA1OH (H)e who must be obeyed.

Re: Generator head replacement

Reply #62 –
Quote from: bbeane –
Generator runs, wired 120. All is good glad that job is done. Little over 3 coach bucks.
Bruce, thanks for getting this sorted out for everyone that will eventually also follow your path.
Scott

Re: Generator head replacement

Reply #63 –
So generator all sorted out, and slid back in. What would be the down side of leaving the bottom out of the generator compartment, it would certainly make things run cooler
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Generator head replacement

Reply #64 –
Louder?

Re: Generator head replacement

Reply #65 –
Road shark hitting something expensive.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Generator head replacement

Reply #66 –
Lots of road debris splashing up and all around the generator.  Rocks, mud, water, gravel.
1998 U320 40'
2005 GMC Yukon
MC# 17609

Re: Generator head replacement

Reply #67 –
Ok then the bottom goes back in.👍
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Generator head replacement

Reply #68 –
I've got a 1999 U270 with the Powertech Isuzu 8kw generator. The head recently failed, and I was able to get a new head and regulator from Powertech July 31st 2024.  So they do still have parts. Also, of important note is that this head was also replaced in 2016 with only 25,000 miles since on the Motorhome, and all within 1200 hrs run time. Another issue was that the head was damaged in shipping as can be seen in the photos. When I called Powertech about the damage, they simply told me that it was my hard luck and refused to do anything about it. I resolved this issue by disputing the charge on my credit card. I still have the broken head which Powertech as of yet has not asked for it's return though they may.

Re: Generator head replacement

Reply #69 –
That thing looks like it was dropped. If the rest of the head is OK could the flange be removed at
a machine shop and your old one be welded back on.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport
 

Re: Generator head replacement

Reply #70 –
rod,

Did you file an insurance claim with the shipper? If not do so ASAP.

Mike
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."