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Thread: 6 x 4 trailer crane
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12th Sep 2022, 12:30 PM #16Golden Member
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The one single thing I would avoid and it was mentioned above is loading the draw bar and towbar fixing points to the car when loading. It is a fairly significant weight itself so the tow ball load will need to be considered as well because that limits how much the trailer can carry and where the load is placed on the trailer. The crane and stability system won't be light and some cars have very limited tow ball loads.
CHRIS
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12th Sep 2022, 11:06 PM #17Most Valued Member
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- Jul 2010
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- Melbourne
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Hi Kryn,
The prices do seem to be getting out of hand, I'm starting to have strange ideas like looking at engine cranes with an eye to buying one to cut up for the tube. I'm finally able to transport 6m lengths but "carrying stock" would be pretty spendy and I might have to drive a fair way to get it. 1st world problems
Hi Ropetangler,
Yeah I was sort of thinking aloud, a leading trailer would stop you loading something to heavy, but would cause trouble if you were unloading something heavy that you put in there some other way.
Hi Chris,
The crane weighs 56kg even if the mount takes that to 100kgs it would only be about 30kgs of ball weight. Without looking up the numbers, anything I own would be good for 200kgs min. So I'm all good there.
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13th Sep 2022, 12:18 AM #18
Stu, the point Ropetangler makes is very important and real!
My outrigger can be pumped up as the load goes on the crane, but it is still risky on your own. I've not lifted anything on soft ground under the outrigger foot, but I have I could control. Depending on what you want to lift and swing across the side, maybe you could use a worm drive of some sort so you lift first, then crank the worm to swing the load across. I have considered that but not implemented it. I would have a pin through the worm wheel and the flange, so you can easily disengage it for light loads?Cheers, Joe
retired - less energy, more time to contemplate projects and more shed time....
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13th Sep 2022, 02:08 AM #19
I actually seen a few months ago a 2500kg newish looking Hiab style crane mounted to a large box trailer had a bartlett drawbar (45 ton rating) , the bloke had it extended 3m or 4m offloading onto a vernadah. If i hadnt of seen it i wouldnt have believed it !
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13th Sep 2022, 03:48 PM #20Most Valued Member
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Hi Joe,
Yeah I get that, the point I am trying to make.
Loading something onto the trailer*. Without an outrigger if you try and lift 1t** things are going to move. When the load comes off the ground its either going to be at the lowest point of the cranes rotation or it will slide at it lifts. If you manage to get it off the ground you will have to push it "up hill" to get it on the trailer.
With an outrigger unless you have your levels correct the lowest point could be 180 degrees from where it is when it comes off the ground.
The real issue is if you are trying to unload something that was say loaded by forklift. You would want to be sure you had control of the load as you slewed, stopping the crane may not help.
Counter weights could help, but really the plan is not to operate in that area, which I understand can be difficult to arrange. Still if they never post it I'll never know lol I assume they are either out of stock or don't keep stock. This is the second time this has happened recently. This was meant to be a quick way to save me from lifting 60kgs on and off the trailer A ramp and winch is looking better about now lol
*assuming you aren't on the side of a hill were there might actually be a point where the trailer actually leveled out as it lifted the load.
**I haven't done the maths but I'd guess there is a good chance the offside wheel would be off the ground if you tried.
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14th Sep 2022, 07:32 AM #21Senior Member
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- Dec 2009
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- Sydney
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- 327
Hi all,
I have been eyeing this idea for a while-
https://www.gumtree.com.au/s-ad/tott...nes/1203207284
For simplicity, one could use this mounted somewhere solid-
https://www.jpsmetal.com.au/shop-onl...receivers.html
And to control wild 'swivel' because of the paltry clamp bolt to the mast, look into a 'slewing gear'. They can be bought, but I'm thinking of a ride-on mower starter-ring gear and suitable worm gear.
see what you think.
AO'C'Waratah' spring hammer by Hands & Scott c.1911- 20, 'Duffy, Todd & Williams' spring hammer c.1920, Premo lathe- 1953, Premo filing machine.
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16th Sep 2022, 08:49 PM #22Most Valued Member
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- Melbourne
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That's a niffy piece of kit!
Sorry for he delay, lets just say there have been some complications with the supplier.
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20th Sep 2022, 09:38 PM #23Most Valued Member
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- Jul 2010
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- Melbourne
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Well after 3 weeks I have my money back. I escalated the Paypal case at 12 noon Thursday and ordered one of these 4 minutes later
https://www.dtmtrading.com.au/produc...-as-141882008/
1:44pm I added a load leveller to my order.
Delivered between 4 and 5pm Friday.
Didn't get my money back until Monday, so there was the worry I would end up with two cranes lol.
Few things need "adjusting" to replace the steel cable with synthetic.
Will be a couple of days at least as the nephews "4x4" has a broken front "suspension" that needs fixing first.
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21st Sep 2022, 04:35 PM #24Most Valued Member
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What sort of synthetic are you going to use for the cable?
Steve
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21st Sep 2022, 10:07 PM #25Most Valued Member
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- Melbourne
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I think it would be best described as 5.3mm chyneema.(see what I did there? Ok I didn't do it I stole it off a youtuber)
Drilled the winch and re-drilled and tapped the crane. Could have almost fitted out of the box but the crane hole pattern was a little out of square* and unlike the fairlead mounting plate the winch only had the two holes on the "centeline"
*to be fair the supplied winch fits just fine.Last edited by Stustoys; 21st Sep 2022 at 10:08 PM. Reason: spelling
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22nd Sep 2022, 12:28 AM #26Most Valued Member
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If it’s the same style Chyneema that is used for 4WD winch ropes keep an eye on it as from what I’ve seen degrades badly in the sun.
Steve
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22nd Sep 2022, 11:29 AM #27Most Valued Member
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Thanks I will keep an eye on that.
The plan is for the crane to spend most of its life in the shed.
Which brings up the issue that the crane will weigh as much if not more than the machine I am most likely to be lifting with it . But at least I will be closer to the house/shed and will likely use my engine crane.
Possibly a 100litre plastic drum with the end cut out would make a good cover if needed.
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25th Sep 2022, 10:17 PM #28
With mine it's on a larger trailer behind the guard. Mind u my trailer is larger than a 6x4. Bigger cantilever, tandem axles etc...
Got the base plate sitting just below the top of the trailer. Sits up on risers from cross members I welded from under trailer. Naturally can't rely on thin folded sheet to take the stresses. Base plate sits out a little bit from the guard to accommodate, not ideal of course, but didnt want to skimp on mounting bolts.
Outrigger - for sure. I take along a couple of something solid like squares of LVL (about 50 mm thick) as base plates to place underneath. Can't trust the ground to be level/ reliable.
But like most things in life - commonsense goes a long way. Do blatantly stupid with it and it may bite you.Frisky wife, happy life. Then I woke up. Oh well it was fun while it lasted.From an early age my father taught me to wear welding gloves . "Its not to protect your hands son, its to put out the fire when u set yourself alight".
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21st Oct 2022, 09:33 AM #29Most Valued Member
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- Jul 2010
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- Melbourne
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Just to show something has happened. Granted not a lot but other things got in the way, seems about normal for me.
Current plan is to run two 30mm x 3mm SHS across the trailer above the A frame angle, if I can get them in there. Though I'm not overly happy about drilling a 10mm hole through the top and bottom of 30mm tube, perhaps I'll weld a short piece of tube on the side to take the holes.
I'll get to try out my pressure washer sand blaster.
Unsurprisingly to OxxAndBert and everyone else I guess, this works. I can only assume I had issues because my jack was so low on oil or more likely I may have had the bleed screw open??
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10th Nov 2022, 10:30 PM #30Most Valued Member
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- Jul 2010
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Well I finally got some tube and started cutting metal. Things move pretty slow around here.
Cut the "replacement" checkerplate tray out.
Plan is to drop one tube through the slot then slide it back under the old tray, the second tube just drops straight in.
Going to test out my pressure washer sandblaster to clean up where the welds* are going.
Anyone got an easy was to derust a trailer pre paint?
Phosphoric acid and a few hours with a paint brush?
*Things would go easier if I bought myself a new MIG
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