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Wheelbarrow01
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Chorus

  #3303450 30-Oct-2024 23:09
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trig42:

 

The boat isn't 'that' heavy I don't think (4.2m Tinny with a 40hp motor) but its axle weight is obviously more than a corner of the 1.9t Kia.

 

I thought about AA, but this happened north of Coromandel on Labour Day - would have been a very long wait. I would have done it if the bloke didn't pop out of his driveway with a better scissor jack than I had - he had no issues winding it up.

 

I think I just need to find a 1.5t jack - that will be fine (and also hope, now that I've replaced both tyres on the trailer, that I don't need to do that again for some time).

 

 

You're right - that is likely not heavy at all. My mate has a 4 metre tinnie and without the outboard attached, the two of us can lift it onto his trailer with a bit of effort. Your mileage may vary if you have remote steering, seats, plus the weight of the outboard, fuel, oars, fishing equipment etc, and I know that modern welded aluminium tinnies tend to be quite a bit heavier than older riveted ones like my mate's. With the weight of your 40 horse factored in, I'd say maybe 500kg for the boat as a starting point. I think you'd find your trailer wouldn't be more than 250kg. - but again it depends how solid it all is. I'd be interested to see a photo of your setup to get an idea.

 

So yea, maybe 750kg as a total guess without seeing your particular rig. That's pretty light so I don't think you need to go too hard out looking for a heavy duty jack. If you think a small trolley jack just isn't for you, then I'd suggest getting any decent quality scissor or bottle jack to replace the broken one for the car, and as someone else suggested, carry a sturdy piece of timber to set it up on - either a piece of 15-19mm thick flooring ply, or an oversized piece of framing timber such as 240x45mm pine. Best to avoid jacking up on a main highway if you can avoid it - passing trucks etc have a nasty habit of blowing your trailer off the jack. This happened to our caravan and would have been a nightmare if a Unimog full of NZDF soldiers hadn't seen our plight and stopped to lift the caravan up for us using nothing but their arms - nice buggers they were.

 

My suggestion is an old Toyota Hilux/Landcruiser jack. People swear by them as they use old school mechanical screw gears, they're light and compact, they never fail, and they can lift quite heavy loads. I have one in my old Hilux Surf from the '80's and it's a beast. Below is a selection of videos of people singing their praises:

 

Toyota's jack is GANGSTA

 

Toyota Jack Sleeper

 

Toyota bottle jack trick




tripper1000
1609 posts

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  #3303795 31-Oct-2024 16:02
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What condition was the scissor jack in? I've had to use some that were stiff and seized, and didn't work at all well. It wasn't a design issue, but a (poor) storage and (lack of) maintenance issue. 

 

Also, scissor jacks lifting capacity isn't linear. In their lowest position they can't lift as much weight/require more turning force than in their higher positions. So if you were using the jack in a very low position (say under the axle), you might have had better luck finding a higher point to jack from.

 

In a car, this isn't usually a problem because 1) the jack is matched to the car, 2) the suspension initially takes most of the weight when the jack in in the lowest position, and by the time the springs are at max extension (no longer assisting), the jack is at a more optimal height to do all the heavy lifting. 

 

 

 

 


trig42

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  #3303807 31-Oct-2024 16:39
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Jack wasn't old or seized up, but I agree on the lower starting point. With hindsight, I should probably have put the jack further toward the middle of the axle so it was starting from a higher point.

 

Unfortunately, the tyre had completely come off the rim so it was as low as it could possibly have been.




Hunter
78 posts

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  #3304271 2-Nov-2024 11:07
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Toyota HiAce and Hilux
They come with a different jack from a normal scissor jack.
If you hunt around the car wrecker/PickaPart, am sure they do have them.
They are not hydraulic jack, more of a screw jack.
Much stronger and lighter than a normal hydraulic jack as needed to lift a loaded Hilux.
Extend quite a bit, but is a little higher than a scissor jack


k1w1k1d
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  #3305443 5-Nov-2024 08:19
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Technofreak
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  #3305539 5-Nov-2024 12:55
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k1w1k1d:

 

Would something like this work?

 

Lifting Jack 48" 3T Farm Jack (Heavy Duty) (SALE) | Trade Me Marketplace

 

 

That is quite similar to the jack used on the VB Commodore. It had a lug that protruded and fitted into a socket under the sill.

 

In that application it had one draw back. For the lug to reach in far enough to fit into the socket the jack rather than being placed vertically was placed at an angle to the car to allow the jack foot to sit under the car slightly. The foot for the jack was made with an angled base for this purpose.

 

As the car was raised the jack moved towards a more vertical position. If you didn't place the jack with enough angle to start with the jack would become too vertical and when you lowered the car the jack post would snag against the body work.

 

The way out of this predicament was to use another jack to lift the car so that the original jack could be removed. The other option that may have worked would be to be quite brutal and drive the foot back under the car with a hammer thus moving the post away from the body. That would be pretty hard to do with the jack still suppporting the weight of the car. 

 

They work really well. The one you have linked has some good features.

 

You need a suitably strong jacking point on the vehicle for the lifting lug to lift against. Because of the jack design the jacking point needs to be at the edge of the vehicle which is a limiting factor for a lot of vehicles as the lifting points are often under the vehicle. Having said that it would likely work for a lot of trailers.





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