Recent Posts

91

General Discussion / Big Boy Isolator / Relay

« Last post by Shane Froman on September 30, 2025, 07:19:39 PM »

Hello everyone - New to this group and have a new to me 07 Contessa.

A recent issue has started when I disconnect from shore power, the Big Boy Isolator kicks in within minutes isolating and killing power from the chassis. At this point I have no power to my alarm system or keyless entry, among other things. I find this odd as I would think these things should still function as long as the battery has some juice. All batteries are new and I tested both, house and chassis to ensure there was plenty of amperage.

So questions are -

Is it correct that keyless entry would not work any longer if the big boy isolated the chassis battery? Do I have another problem?

What tells the Big Boy when to cut the power and at what battery level? (is it the relay module?)

Pics attached

Thanks in advance for the help!

92

Technical Support / Re: Drive Shaft U Joint bolt torque spec

« Last post by John Demartini on September 28, 2025, 01:48:46 PM »

Hi Eric:

Many thanks for the reference.  This is exactly what I needed.

93

Technical Support / Re: Drive Shaft U Joint bolt torque spec

« Last post by Eric Maclean Co-Admin on September 27, 2025, 12:51:49 PM »

John
It depends on the size of the yoke bolts whether or not kit has "u" bolts , end caps or straps with bolts .

This link should help it covers drive shaft mounting ( at the bottom of the page)

https://spicerparts.com/resources/lube-torque-specs

Hope this helps
Eric

94

Technical Support / Drive Shaft U Joint bolt torque spec

« Last post by John Demartini on September 26, 2025, 04:26:17 PM »

Good Morning:

Recently had a short tow, needed to reconnect driveshaft at differential.  I snugged them up, but have not set the torque yet.  Does anyone have a spec on these, or if you can tell me where to find?

2000 Patriot
3126b
Allison Trans

Thank you...

95

Technical Support / Re: Cat C12 crank no start again

« Last post by Carl Boger on September 26, 2025, 02:11:14 AM »

Jose,

I would unplug the main plug behind the electrical panel under the drivers seat area and clean the two halves with electrical  contact cleaner.  i also used mig welding tip cleaning rods and wire brushes to get the area  as clean as possible.  I then used dielectric grease around the halves and used a zip tie to keep it together and tight. 

I have done this once or twice in the last 8 or so years and it has fixed the flickering lights no start problem for me.  if on the road I can generally just twist/push the connection and it will start.  Hasn't been a problem for years now and hopefully it won't again.

96

Technical Support / Re: Cat C12 crank no start again

« Last post by Jose Rita on September 25, 2025, 10:53:55 PM »

Sorry its been a while.  I just got the rv home.  The mechanic checked and not a fuel related issue. He believes it is an electrical issue, it did start and he was able to complete his work I had it there for well over a month for new wheel bearings followed by all air bags replaced…pretty penny.  The no start issue really set him back and backorder on air bags.  Bringing it back home I noticed that the dash lights would flicker once in a while so he was in the right direction.  I will try to look at the grounds and fuses while here and will after getting some OT in,  if I cant find, send it back to him.

Thank you all fir the help and suggestions

97

General Discussion / Re: BIG BOY

« Last post by Frank Bergamo on September 25, 2025, 04:07:01 PM »

Try soldering it, or if you have room, a butt connector would work. Good luck!

98

General Discussion / Re: BIG BOY

« Last post by Gary Darby on September 25, 2025, 01:34:45 PM »

Hello Rocky Healey,

We also have a 2008 Beaver Patriot Thunder Concord IV. I can give you what we did due to the fact we had a complete solar system installed. We replaced the Big Boy and the MAGUNM inverter/charger system. (and some other solenoid installed by the last owners. No idea what they were trying to do but you will see in the images)

We removed the MAGNUM system and replaced with all Victron. Next we replaced the Big Boy with a GEN2 LiBIM 225 batter isolation manager. It seems to match up great with the victron system.

Images;

99

General Discussion / BIG BOY

« Last post by Rocky Healey on September 25, 2025, 06:04:46 AM »

I cleaned my BIG BOY and in putting it back together I broke one of the wires the goes to the terminals for the green wires once it is put back together. I am looking for any suggestions to fix this BO BO. or am I looking at buying a new BIG BOY.  Any thoughts greatly appreciated.  Thanks

Rocky Healey
2008 PT 45ft
Cat C-13

100

Technical Support / Re: Slide out floor sagging

« Last post by RogerMilne on September 25, 2025, 12:16:20 AM »

On you tube the AZrvexpert has a video of an 08 Beaver PT Winchester4 with a very similar issue and how he fixed it.

Thanks for the tip. I'll go check it out.