Underslinging an axle on a caravan?

Submitted: Monday, Jan 22, 2007 at 22:20
ThreadID: 41518 Views:19033 Replies:9 FollowUps:8
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Does anyone know of a decent mechanic/suspension specialist who underslings axles (putting the axle below the leaf springs) in Melbourne?

We've just gone from our camper to a caravan and just want it to able to get into some rougher ground, as we were able to do with camper.

Jim.
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Reply By: Ianw - Monday, Jan 22, 2007 at 22:47

Monday, Jan 22, 2007 at 22:47
Try www.hardingscaravans.com.au/repairs10.htm
Ian
AnswerID: 217151

Follow Up By: Jimbo - Monday, Jan 22, 2007 at 23:11

Monday, Jan 22, 2007 at 23:11
Thanks Ian
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Reply By: The Bigfella - Monday, Jan 22, 2007 at 22:47

Monday, Jan 22, 2007 at 22:47
Jimbo

Are you going soft in your old age? You didn't have the camper long!!!!!!!!

I am only just getting used to my Coromal Camper after 12 months. The best thing I have ever bought. I guess I will go to a caravan one day but with the camper having an electric (12 Volt) wind up mechagnism (spelling) and an Aussie Traveller annex (no tent pegs) I have got lazy. Means when we set up camp I have more time for my homebrew and a longer happy hour.

Can't help out with your question but thought it was time to give you a sh11t stir.

Hope to catch up again one day and have a few ales (homebrewed of course). Still remember the great time we had last year with Mr and Mrs Al, numberone and Glenn (Vic).

Cheers

The Bigfella
AnswerID: 217152

Follow Up By: Jimbo - Monday, Jan 22, 2007 at 23:09

Monday, Jan 22, 2007 at 23:09
You're right Brian, I'm an old wimp.

We've decided to upgrade to a pop top van. After 13 months and 16 trips (65 nights away) we love the camper, but just need something that is easier, and with more storage. The air con is wonderful. But I'm now in the market for a generator.

The sooner you can make it down to Vic again, the better.

You and Gay are welcome at our place anytime.

Regards,

Jim.
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Reply By: aceman - Monday, Jan 22, 2007 at 23:14

Monday, Jan 22, 2007 at 23:14
Hi, cant help (I'm in Bris) but thought I'd add comment to your request.
I too went from camper (offroad) to caravan and did exactly what you are asking.
I had axle underslung and stablizers replaced with dropdown jacks added by dealer at no extra cost (gotta be happy about that).
However downside was some 12mths later whilst traveling down Sth, we had some wet weather and decided to put our annex walls up - Guess what.
Too short due raised van!
Maybe there's a moral here, but guess what I am saying is make sure you have correct measurements for your annex, if you havent already done so.
Cheers

AnswerID: 217160

Follow Up By: Jimbo - Tuesday, Jan 23, 2007 at 06:49

Tuesday, Jan 23, 2007 at 06:49
Good advice Ace, luckily we don't have an annex.
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Reply By: Member - Oldplodder (QLD) - Tuesday, Jan 23, 2007 at 08:55

Tuesday, Jan 23, 2007 at 08:55
Not a big job to do yourself.

Not sure if you have thought it through, you most probably have so ignore the following if you have.
Just remember some axles (if not most) have a little toe in, and a locating hole or lug to engage the spring.
So flipping the axle over gives you toe out, but flipping it and reversing it end to end give you the right result. :o) Toe in again for better towing.

Not sure how your shockies are attached.

Friend did this to thier van a little while ago and it worked well for those trips down a few well formed tracks. Better clearance at the rear on some creek crossings.
He didn't lift the hitch either, so more clearance at the rear, but too low on the hitch might make the van wander when towing.
AnswerID: 217201

Reply By: Ozrover - Tuesday, Jan 23, 2007 at 09:14

Tuesday, Jan 23, 2007 at 09:14
Jimbo.

It's not a hard job to do it yourself.

Just get the whole van jacked up & stabilised on chassis stands (borrow some) with the wheels off the ground far enough to be able to do the spring over.

Support the axle on jacks to take the weight of the axle/wheels, remove the wheels, undo the U-bolts from the axle & raise the axle to clear the springs.

Remove the springs & reverse the centre bolt holding the spring pack together (replace & grease the bushes while your at it).

Lower the axle far enough to clear the new spring position & refit the springs.

Raise the axle to fit under the springs & refit the U-bolts (fit new lock nuts on the U-bolts).

Make sure that all the wiring for the brakes is long enough for the lift!

I've done quite a few of these over the years & it just takes a bit of labour & skinned knuckles!!

I'd probably look at putting some extra leafs in & heavier shocks while your at it if your going off road as well.

Lotsa luck 8 )>
AnswerID: 217204

Reply By: Twinkles - Tuesday, Jan 23, 2007 at 10:56

Tuesday, Jan 23, 2007 at 10:56
Used to have a Jayco wind up before my current CT. I put the axle under the springs myself by jacking it up and I carried some thick blocks of wood to put under the wind down stablilizers. It had cable operated brakes so made sure cable was running straight. easy
AnswerID: 217224

Reply By: Member - DOZER- Tuesday, Jan 23, 2007 at 15:43

Tuesday, Jan 23, 2007 at 15:43
R u aware it is illegal? IF the u bolts break, there is nothing encapsulating the axle and tyre, and could end up anywhere...i believe that is the standard...
Now dont get me wrong, ive done it b4 myself, but at the time, i didnt know this.
Andrew
AnswerID: 217260

Follow Up By: Member - Pesty (SA) - Tuesday, Jan 23, 2007 at 18:57

Tuesday, Jan 23, 2007 at 18:57
Find that hard to believe, you can buy Trailers, Campers and Caravans all with the axle underslung, espcially the off road stuff.
My Cub off road camper came with the axle underneath, new!

Cheers Pesty
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Follow Up By: Ozrover - Tuesday, Jan 23, 2007 at 19:00

Tuesday, Jan 23, 2007 at 19:00
Dozer.

How do you know that doing a spring over conversion is illegal??

If the U-bolts break then they shouldn't have been used in the first place!

Secondly, how do caravan/trailer manufacturers get away with it, because most of the ones I've looked at (Jayco, Goldstream & a bunch of others) offer "Off Road" versions with spring over suspension.

I've built trailers with spring over set ups, & had them blue slipped with no problems.

I've also got mates who have spring over 4bys & been engineered legally.

Just wondering where you get your info'??
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Follow Up By: Member - DOZER- Tuesday, Jan 23, 2007 at 19:11

Tuesday, Jan 23, 2007 at 19:11
I was told by a caravan guru here in Wollongong....maybe you guys can prove me and him wrong, which i wouldnt mind at all...because my current van is converted to underslung axle and is not std.
All the points above, i have no answer to.....other to say they need engineers approval or are std from the factory like that, and have been engineer passed.
Its like anything.....once things go pear shaped, like if lawyers gets involved.....youd wish you hadnt.
Andrew
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Follow Up By: Ozrover - Tuesday, Jan 23, 2007 at 19:25

Tuesday, Jan 23, 2007 at 19:25
Back again!

I've just had a look at my copy of building small trailers, & cannot find anything that says you can't have an under-slung axle?

Agree, if you buy one from the factory like that then you should be ok, Just wondering where you stand with home made trailers??

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Reply By: lifeisgood - Tuesday, Jan 23, 2007 at 21:28

Tuesday, Jan 23, 2007 at 21:28
Jimbo Similar to you, went from camper to mini pop top . So quick to be set up ,good for lunch stops without flies, more comfortable in winter or wet windy days etc After grazing the rear door in a creek bed (lock 9 Murray river area)
I gave it the lift. Bayswater Caravans (caravan city) had an independent van repairer at the rear who did the axle shift. Cost $220 dollars which I thought was pretty good and I had it back in 2 days. Made a huge difference. Slopes a little to the front hitch on the patrol but that helps the rear steps and nose is down to the breeze. Oodnadatta to Dalhousie saw me re-tighten every u bolt nut. Lucky I got under to look!! Also snapped off the electric brake wiring so check that you have enough length. Also as mentioned ensure the park brake cable is re adjusted to suit. If doing it yourself it might be wise to take a measurement from the front of the axle to the front of the van chassis to check against the completed job later.
AnswerID: 217355

Follow Up By: Jimbo - Tuesday, Jan 23, 2007 at 21:58

Tuesday, Jan 23, 2007 at 21:58
Thanks Mate,

Just the information I was after. I'll give them a call.

ATB,

Jim.
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Reply By: Member - Reiner G (QLD) 4124 - Tuesday, Jan 23, 2007 at 23:26

Tuesday, Jan 23, 2007 at 23:26
I build Teardrop Campers for a living . ADR compliant with axles on top or underneath depending on customers preference.
Home builder have to comply with the same rules.
You can download the rules from the department of Transport web-page.

Reiner
www.aussieteardrops.com
AnswerID: 217388

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