Raising Caravan Height

Submitted: Tuesday, Nov 13, 2007 at 22:32
ThreadID: 51579 Views:29140 Replies:12 FollowUps:19
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Ok i am looking at raising the height of my caravan to match the 4wd and also give me some more ground clearance.

We are heading off to warra station(wa) again and this time i want to take my van,18' Galaxy pop-top,now the track in is OK but some spots get a little rutted and just want to try and avoid any damage to the van.

I know you all say get a 4WD van, but we would hardly ever need it for 4WD just after a little more ground clearance.Now it has leaf springs that sit on the chassis at bothe ends and they are already very curved so no chance of resetting them or making longer shackles but i have thought about putting a spacer under the rear working surface ,(you know the bit that actually moves when the spring is loaded and unloaded) to push the spring down and lift the van up.Only looking for a couple of inches.

Any ideas.

Matt
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Reply By: Notso - Tuesday, Nov 13, 2007 at 22:36

Tuesday, Nov 13, 2007 at 22:36
A lot of people move the axle to under the springs instead of above them, this will give quite a lift. The van looks a bit strange but most say it doesn't affect the handling all that much.

Mate took his standard road van across the great central road. Not something I'd choose to do though.

AnswerID: 271601

Follow Up By: Member - Matthew C (WA) - Tuesday, Nov 13, 2007 at 22:41

Tuesday, Nov 13, 2007 at 22:41
Yeah ive been told that before,i guess it would give that couple of inches i am looking for,Just need to decide if its safe i guess.
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Follow Up By: Member - Matthew C (WA) - Tuesday, Nov 13, 2007 at 22:49

Tuesday, Nov 13, 2007 at 22:49
Ok i wonder if i could put a spacer in there when we get to warra just to get us over the rough stuff.Look im not a scaredy cat ,just want to minimise the risk of damage.
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Follow Up By: Member - Debbie R (SA) - Tuesday, Nov 13, 2007 at 23:02

Tuesday, Nov 13, 2007 at 23:02
Matthew C,

What Notso has said above is quite true, we actually had that done to our Roma van. We used to have a Ford Sedan as tow vehicle, however when we bought our first Crusier (which had a lift kit) we had to do something as the van was too low. Took it to the Caravan Yard we purchased van from and approx $150.00 we had the springs changed and the van was of similar height to the Cruiser. Towing was not a problem, safe, the only thing we needed was a extra step for me to be able to step onto the Caravan step. We did go on a few dirt roads but nothing out of the ordinary.

Cheers
Debbie
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Follow Up By: Member - Matthew C (WA) - Tuesday, Nov 13, 2007 at 23:09

Tuesday, Nov 13, 2007 at 23:09
Debbie

thanks for that,so did they change the springs or did they swap them from top to bottom of the axle.

Matt
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Follow Up By: Member - Jerry C (WA) - Tuesday, Nov 13, 2007 at 23:12

Tuesday, Nov 13, 2007 at 23:12
Hi Matthew,

As suggested above talk to some of the trailer spare parts company's, there are a number of them around Perth.

Cheers,
Jerry.
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FollowupID: 534602

Follow Up By: Member - Debbie R (SA) - Tuesday, Nov 13, 2007 at 23:17

Tuesday, Nov 13, 2007 at 23:17
Hi Matthew,

They just swapped them over, there fore we only paid for labour. But please for safety sake check views of a few different Caravan outlets before you attempt to do a DIY job if thats the way your thinking. Our local caravan dealer did tell us how to do the job ourselves, but Murphy was hanging over my head and told me to leave it to the experts. Besides for such a small amount it was much easier for them to do all the work LOL

Cheers
Debbie
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Follow Up By: Member - Matthew C (WA) - Tuesday, Nov 13, 2007 at 23:17

Tuesday, Nov 13, 2007 at 23:17
Yeah i might give TRAILER PARTS a call during the week ands see what the deal is ey!!!!!

Sounds like a plan.

MAtt
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Reply By: PradOz - Tuesday, Nov 13, 2007 at 23:09

Tuesday, Nov 13, 2007 at 23:09
REVERSE THE AXLE SO THE VAN SITS HIGHER. LIFT AROUND 100MM. NO PROBLEMS AT ALL AS ITS DONE BY PLENTY OF FOLK. I AM ABOUT TO DO IT ON MINE SOMETIME SOON AS MINE WAS REVERSED (LOWERED) BY PREVIOUS OWNER TO SUIT THEIR CAR.

YOU JUST HAVE TO THINK ABOUT ANNEXE IF YOU HAVE ONE AS IT LIFTS THE ROOF AND OBVIOUSLT THEN LIFTS THE WALLS UP TOO. IN MY CASE IT WOULD BE PERFECT. I CANNOT SEE YOU HAVING A PROBLEM. MANY PEOPLE SAY IT IS SIMPLE TO DO. I WILL FIND OUT SOON. IT WILL GIVE YOU CLEARANCE UNDER AND ALSO AT WHEELS SO SHOULD BE WHAT YOU WANT. BEST OF ALL IF YOU DONT LIKE IT JUST SWAP IT BACK.

(SORRY FOR ALL THE CAPITALS - THE CAPS LOCK IS STUCK ON)

CHEERS
AnswerID: 271612

Follow Up By: Member - Matthew C (WA) - Tuesday, Nov 13, 2007 at 23:12

Tuesday, Nov 13, 2007 at 23:12
That may be what has happened here because the people i got mine off had a commodore sedan towing it and ive got a 4WD obvioulsy so that may well fix it hey.!!!

Matt
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Reply By: disco1942 - Tuesday, Nov 13, 2007 at 23:35

Tuesday, Nov 13, 2007 at 23:35
If you only want round 50mm lift then have the spring mounting points removed from the chassis, have 50mm square section welded on the underside of the chassis rails and then replace the suspension. If you want 75mm lift then use 75 x 50mm section. The extra rectangular/square section will strengthen the chassis as well as giving the extra height and not cost that much extra.

PeterD
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AnswerID: 271615

Reply By: 96 GXL 80 series - Tuesday, Nov 13, 2007 at 23:57

Tuesday, Nov 13, 2007 at 23:57
Mathew C,
as Debbie said will be okay as it sounds like you have slipper springs on the van.

Just swap the axel to the under side of the spring, but in doing so make sure the centre bolt in the spring is the right way around to fit the plate welded on the axel.

You may have to undo the centre bolt and turn it up the other way so as to match the plate on the axel.

If you don't and the axel moves around (Slips back and forth) your caravan will be crab walking ( not tracking straight).

AnswerID: 271618

Reply By: disco driver - Wednesday, Nov 14, 2007 at 00:32

Wednesday, Nov 14, 2007 at 00:32
Hi Matthew,
As well as all the advice and suggestions given, there must be a word of caution if you are doing it yourself.

REGARDLESS OF HOW YOU INCREASE THE HEIGHT, MAKE SURE THAT YOU RE ADJUST THE VAN BRAKES AND THAT THE HYDRAULIC HOSES (IF FITTED) ARE LONG ENOUGH TO ALLOW FOR THE EXTRA HEIGHT.

Good Luck

Disco.

AnswerID: 271621

Follow Up By: pojo - Wednesday, Nov 14, 2007 at 08:59

Wednesday, Nov 14, 2007 at 08:59
When i bought our olympic 16ft. poptop asked the engineers if they would change the axel to under the springs they did the job for me and informed me that it would not affect my warrant I have had the van for 10 years now and it has been around Aus. and with plenty off rough roads and never had any problems
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Reply By: Member - MrBitchi (QLD) - Wednesday, Nov 14, 2007 at 09:44

Wednesday, Nov 14, 2007 at 09:44
Think about it.... Putting a spacer under the slipper part of the spring won't give much of a raise. You're moving the end of the lever (spring) by say 50mm (thickness of spacer). The wheel is half way along the lever. It will only move 25mm. Need a bloody big spacer to make it worthwhile.
Better to move the spring over the axle.
Assuming the axle is 50mm thick and the spring pack about the same, moving the spring over the axle will give a 100mm lift.

If it were my van I'd be taking it to a trailer place and getting them to fit shackle springs and do the spring over at the same time.
AnswerID: 271652

Reply By: Nav 8 - Wednesday, Nov 14, 2007 at 10:23

Wednesday, Nov 14, 2007 at 10:23
Matthew,,Check with DOI about putting the axle under the springs. I think you will find it is illegal to do that as the axle is no longer contained by the springs if it breaks away. I know a lot of people do it but could be an insurance issue in an accident. Nav.
AnswerID: 271657

Follow Up By: Steve Ellis - Wednesday, Nov 14, 2007 at 16:04

Wednesday, Nov 14, 2007 at 16:04
Some axles are offset { Hub axle is welded to the top or bottom of the long axle if you know what I mean} If that is the case it may simply be a matter of turning the axle 180 degrees. You may have to re weld the plate on the other side to positively locate the spring. This would give a lift of up to 3 inches in the old money. Locating the axle under the spring lifts it about 5 inches depending on the thickness of the spring. It is a common conversion and avoids banging the back of the van on speed humps and servo driveways. That is not always good for the stabilizer jacks. A lot of van parks now have curbing at the site and its always handy to have a bit of clearance. It does not stop the rear of the van banging on the road at low tide on Wisemans Ferry Ramps. If you do the job yourself make certain you lift the van up high and chock it up very stable. Dropping it may hasten your retirement plans. Dont use the stabiliser jacks to hold it up with no axle underneath. If you lift it too high you may need to locate the tow coupling on the underside of the chassis. I dont know about the legal position as Nav 8 says but lots of people have done it including me and a couple of mates. Best of luck.
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Follow Up By: disco1942 - Thursday, Nov 15, 2007 at 20:10

Thursday, Nov 15, 2007 at 20:10
Nan8

All truck axles are under the springs.

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Follow Up By: Member - Luke (SA) - Thursday, Nov 15, 2007 at 21:31

Thursday, Nov 15, 2007 at 21:31
Jayco in Adelaide will undersling the axle before you buy their vans
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Reply By: PeterInSA - Wednesday, Nov 14, 2007 at 16:28

Wednesday, Nov 14, 2007 at 16:28
Matthew,
I am assuming that you have a heavy duty towbar with a square steel section connected to the towball. Why not purchase an height adjustable Haymen Reece towball fitting, in Adelaide I have seen the HR Towing pack second hand from $250 to $300. This seems the easiest solution, and you have not impacted the van if later on you wish to sell it to a Holden or Falcon owner.

Alternatively I would look at putting the springs above the axle as long as this is legal. I would NOT look at Steves idea of turning the axle 180 deg without a lot more investigation. When I looked into this I was told it would affect the camber of the tyres/wheels and the tyres would wear out quicker and from memory it could be a safety concern also.

Peter
AnswerID: 271700

Follow Up By: PeterInSA - Wednesday, Nov 14, 2007 at 16:31

Wednesday, Nov 14, 2007 at 16:31
Matthew
Delete my first para, was interrupted and lost my train of thought. Its old age I guess.

Peter.
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Follow Up By: disco1942 - Thursday, Nov 15, 2007 at 20:06

Thursday, Nov 15, 2007 at 20:06
Peter

There is no camber on an overlay axle. I had one reset by a truck aligner as it was wearing out the inside of the tyre. He reset it bolt upright. When he checked the other axle there was no camber on it either. On my current van I had the overlay axle turned over and suffered no adverse tyre wear.

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Reply By: 96 GXL 80 series - Wednesday, Nov 14, 2007 at 16:49

Wednesday, Nov 14, 2007 at 16:49
It is not illegal to have the axel under the spring, if anything it is stronger and less weight on the "U" bolts holding the axel and spring together.

All you will have done is transfer the load from the "U" bolts to it sitting on top of the axel, and all the "U" bolts will be doing is holding everything in place instead of carrying the weight and also holding everything in place.
AnswerID: 271709

Reply By: Steve Ellis - Wednesday, Nov 14, 2007 at 20:04

Wednesday, Nov 14, 2007 at 20:04
Peter. How would it effect the Camber & why would the tyres wear out quicker? It would seem someone has given Peter a bum steer.
Tyres do not generally wear out on caravans anyway. They die of old age. If yours are more than 5 or 6 years old get some new ones.
AnswerID: 271741

Follow Up By: PeterInSA - Thursday, Nov 15, 2007 at 15:34

Thursday, Nov 15, 2007 at 15:34
Steve
about 3 years ago I wanted to raise the van 4 inches, looked at putting the springs ontop of the axle, looked at an additional 4 inch steel tube going from infront of the wheels to the back of the van, and because I had seen a rig with the axle rotated 180 deg looked at this alternative as well.

I was told by a caravan repairer that the rotation was not an option for me, I cannot recally why ie whether the wheels have a slight toe in (our van is a tandem) or the top of the wheels side to side are closer than the bottom (camber?) anyway I had the 4 inch steel tube welded on $1200, and it did the job giving the chassis extra strength. Also had to go to the adjustable Hayman Reece set up to match up with the cruiser towbar.

Re camber: About 15 years ago had a single axle, independent 17ft van, the suspension sagged which altered the camber and the inside edge of the van tyres wore out quickly.

Peter
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Follow Up By: disco1942 - Thursday, Nov 15, 2007 at 20:14

Thursday, Nov 15, 2007 at 20:14
See my FollowUp in Reply 8

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Reply By: Crackles - Wednesday, Nov 14, 2007 at 21:22

Wednesday, Nov 14, 2007 at 21:22
Looking at your van Matt a 2" lift may be stretching your annexe a bit particually on uneven ground. I'd measure it to ensure any lift is OK. Slipping the axle under the springs would most likely give you far too much lift. Add both the thickness of the spring pack together with the axle shaft to see what the increase will be. It's also not quite as simple as others above have said. As well as inverting the centre bolt the bearing plate on the axle will need modifying to suit the spring which can often mean longer U bolts. Brake lines & or electric brake wiring most likely will need extending as well.
If you have slipper springs as you seem to indicate I'd suggest replacing them with eye to eye spring packs. They will be far more reliable on the rougher roads and could be mounted to give what ever lift you want.
Rewelding the spring mounts on a box spacer would be another option but should be done by an egineering workshop.
Cheers Craig...........
AnswerID: 271761

Follow Up By: 96 GXL 80 series - Wednesday, Nov 14, 2007 at 23:46

Wednesday, Nov 14, 2007 at 23:46
Nothing will alter, the "U" bolts will be the same and forget about changing the springs as this will mean welding a bracket on to the van to use shackles and they are more trouble than they are worth.

The Slipper spring has more control and less moving parts.

I have done this many times and also taken out the set up that Crackles is referring to and donated them to the tip.

If you are out in the middle of nowhere, the less bits you need the better.

To save you disconnecting any brake connections do one side at a time.
Put the van on stands and remove the wheel, undo the "U" bolts then undo the front bolt holding the spring in place.

Slide the spring out from under the axle and put it above the axel and fit it back in place, put the front bolt back in then change the centre bolt around

Do the same to the other side then lift the axel under the spring and align the hole up in the plate that is welded on to the axel with the centre bolt, put the plate that hold the "U" bolts on top of the spring and fit the "U" blots and spring washers and nuts, do them up and all it done.

If you do have an annexe and now the walls are to short, easy just dig a hole 50mm deep and let the caravan wheels into them and your annexe will be the right height.
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Follow Up By: Axel [ the real one ] - Thursday, Nov 15, 2007 at 08:39

Thursday, Nov 15, 2007 at 08:39
gxl 80 , please explain how in any shape or form a slipper spring has more control than an eye to eye spring , cause that statement is just total crapola , the 1 and only reason any trailer/cvan maker uses a slipper spring set up is the cost $ saving.
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Follow Up By: Crackles - Thursday, Nov 15, 2007 at 17:41

Thursday, Nov 15, 2007 at 17:41
My suggestion of eye to eye replacement springs is to improve the trailer ride over rough roads which in turn makes them far more reliable & less likely to damage items inside the van as well. Have seen & heard of many slipper spring failures offroad hence the advice. It's the most expensive of the options but by far the best other than a coil & shocker combination which the chassis of the van would not be built to support anyway.
As for modification of the bearing plate it's what I had to do when I inverted my trailer axle. Of course each trailer can be a little different depending on if it's a round or square axle etc.
As for your instructions on swapping the axle to the bottom it's a little simplified as most axles have tags welded on them to locate the spring. When flipped over the tags are on the wrong side. You could roll the axle 180 degees but then the brakes are back to front so then you'd need to flip the axle left to right. More complicated again for step axles which would need the tags cut off & welded on the other side. As I said not quite a simple as it seems.
Can just imagine selling a van with an anexe that doesn't reach the ground.........."Yeah mate just dig a couple of holes for the tyres". I'm sure caravan parks would be happy with that :-))
Cheers Craig..............
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FollowupID: 534893

Reply By: Steve Ellis - Thursday, Nov 15, 2007 at 19:42

Thursday, Nov 15, 2007 at 19:42
I cant beleive so called experts have made the exercise so dan complicated. We are talking about a bigger box trailer. We are not building the space shuttle.
AnswerID: 271865

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