Skip to main content ↑ ↓
Topic: Isolator board parts replacement (Read 393 times) previous topic - next topic

Isolator board parts replacement

I removed the 2 Primus boilers on my 1995 U320 for rebuilding.
The boilers are both located below the Isolator panel in the bay just after the rear left wheel. Having the area more open lends itself to equipment replacement.

Several years ago I bought a Victron 200 - 2AC isolator. I will finally get around to replacing the original isolator.
On the steel panel that the isolator is mounted to are a couple self resetting breakers, I can't read the specs but I see on the wiring schematic for this coach they appear to be( 2) 15amp and (1) 20 amp. I will order some. Any brand suggestions?
There is also a square relay, I can't read any part numbers or specs for this unit, any ideas?

In researching past posts I find the recommended solenoids are Cole Hersee 24213, I have (2) and will replace both. I choked a bit when I saw the price, Is this the current go to product or is there a less expensive route?

I intend to put it all back stock so I'm not interested in any major changes that are not plug and play.

Thanks for your advice.
1995 U320C SE 40'
Jeep 4x4 Commander - Limited - Hemi
"The Pack"  Yogi and Diesel our Airedales -  Charlie our Boxer/Akita mix. Gone but NEVER forgotten Jake our yellow Lab.
NRA Law Enforcement Firearms instructor - Handgun/shotgun
Regional Firearms instructor for national Armored Transp. Co.

Re: Isolator board parts replacement

Reply #1 –
Quote from: Lon and Cheryl –
There is also a square relay, I can't read any part numbers or specs for this unit, any ideas?

Lon,

On your age coach that relay should be an RL3040. If you look at your wiring diagram and it is feeding the condenser fan this relay is what should be a direct replacement.
Amazon.com: Install Bay Economy Relay 12 Volt 30 and 40 Amp Each- RL3040 :...

Mike
As an Amazon Associate Foretravel Owners' Forum earns from qualifying purchases.
Pamela & Mike 97 U 320

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

Re: Isolator board parts replacement

Reply #2 –
BIG THANKS!
1995 U320C SE 40'
Jeep 4x4 Commander - Limited - Hemi
"The Pack"  Yogi and Diesel our Airedales -  Charlie our Boxer/Akita mix. Gone but NEVER forgotten Jake our yellow Lab.
NRA Law Enforcement Firearms instructor - Handgun/shotgun
Regional Firearms instructor for national Armored Transp. Co.

Re: Isolator board parts replacement

Reply #3 –
Quote from: Lon and Cheryl –
On the steel panel that the isolator is mounted to are a couple self resetting breakers, I can't read the specs but I see on the wiring schematic for this coach they appear to be( 2) 15amp and (1) 20 amp. I will order some. Any brand suggestions?

I find the recommended solenoids are Cole Hersee 24213, Is this the current go to product or is there a less expensive route?
Bussmann is a good brand for auto reset circuit breakers.  Check your local AutoZone store - they usually have them in stock.

https://www.autozone.com/starting-charging-and-miscellaneous-electrical/circuit-breaker/p/bussmann-circuit-breaker-bp-cbc-20hb-r/32371_0_0

I would use the 24213 for both boost and aux start solenoids.  Install them now, and never think about them again.  Yes, they are pricey, but this is not the place to go with the cheaper alternative.
Sometimes...more expensive IS better.
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Isolator board parts replacement

Reply #4 –
Thanks for the help.
I bought the two 24213 solenoids, Bussmann breakers and a couple (1) economy and (1) bosch relays.
1995 U320C SE 40'
Jeep 4x4 Commander - Limited - Hemi
"The Pack"  Yogi and Diesel our Airedales -  Charlie our Boxer/Akita mix. Gone but NEVER forgotten Jake our yellow Lab.
NRA Law Enforcement Firearms instructor - Handgun/shotgun
Regional Firearms instructor for national Armored Transp. Co.

Re: Isolator board parts replacement

Reply #5 –
Finally getting to the isolator replacement with the Victron unit.
My problem is access to the back of the steel plate that the isolator and the fuses and solenoids attach to.
I was surprised to find that Foretravel used slotted screw heads to secure the fuses. The back side has a nut ( or something, I can't see it) that is very rusted.
I can't get in there to see what kind of nut is used and what size the head of that nut is.
 Any clues as to what is back there?
When you changed the electronics mounted to that plate what did you use to mount the electronics?

It looks like I will need to raise the coach as high as possible so I can crawl in there to get access to the bolts holding the electronics.
Unfortunately I have removed the original isolator and have all the cable running to it disconnected, now I can't start the coach to air it up and raise it.
Can ALL the wires connected to the factory isolator be connected together temporarily so I can start the engine?
1995 U320C SE 40'
Jeep 4x4 Commander - Limited - Hemi
"The Pack"  Yogi and Diesel our Airedales -  Charlie our Boxer/Akita mix. Gone but NEVER forgotten Jake our yellow Lab.
NRA Law Enforcement Firearms instructor - Handgun/shotgun
Regional Firearms instructor for national Armored Transp. Co.
 

Re: Isolator board parts replacement

Reply #6 –
Yes that will work
previous 1984 35 ft ORED 250 HP 3208 Cat       
previous 1998 40 ft U295 CAI 325 hp Cummins
previous 2003 40 Ft u320 build #6140 450 Cummins M11.                                                         
1999 Mazda Miata
Ron, Nancy, Tipper the cat, Max The dog
1997 U 270 36 ft build number 5174 8.3 Cummins