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tow hooks and underbody

G

Guest

Guest
hi guys
Is there any truth in the fact that the tow hooks located just under the
front bumper of the 80 series are not load rated and just for tying down the
cruiser on board the ship.
Does any one know if there is a direct replacement for these hooks, or where
to buy load rated hooks for the front and rear.
Does any one know if there is after market protection for where the spare
wheel sits ,like a bolt on plate.
cheers
john92 hdj80 1hdt
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John
I don't know what they are for, but I twisted one of mine when I
attached a rope to it and pulled someone out. To be fair there was a
considerable side-ways element to the pull, but given that I was using a
rope they must be pretty weak.
I (ahem) tested the frontal impact strength of a TLC versus the rear end
of a Honda Civic earlier this year, and when the loss-adjuster specified
the new bits for the front of my car he included that tow-hook.
Interestingly the new design is much stronger - certainly far more than
would be needed to tie it down in transit.
In my opinion this is not entirely a good thing since any sideways load
on that hook is going to apply a twisting force the main longitudinal.
Bending a piddly little bracket is of no consequence, but twisting the
front longitudinal is not such a good idea. The section in the
hand-book on winching makes it clear that if you do use these to attach
to you should use both to avoid exactly this problem.
If you want tow points on the front then I would have though a
reinforced front bumper is the right way to go, since this will spread
the load over both front longitudinals. You probably can buy a pre-made
one, but I wouldn't bother - why not just trundle down to an
agricultural engineers and ask them to make you one to fit inside and
behind the existing bumper? A piece of channel section (U shape) would
do the job nicely.
I don't think load-rating is an issue, you are not going to be hauling
things at speed on the road with it. Other bits will break long before a
towing eye fails.
Christopher Bell
|
| hi guys
| Is there any truth in the fact that the tow hooks located just under
the
| front bumper of the 80 series are not load rated and just for tying
down
| the
| cruiser on board the ship.
| Does any one know if there is a direct replacement for these hooks, or
| where
| to buy load rated hooks for the front and rear.
| Does any one know if there is after market protection for where the
spare
| wheel sits ,like a bolt on plate.
| cheers
| john92 hdj80 1hdt
|
| --
| European Land Cruiser Owners Mailing List
| Further Info: http://www.landcruisers.info/
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European Land Cruiser Owners Mailing List
Further Info: http://www.landcruisers.info/
 
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Guest

Guest
Jon
My old one was the flimsy type, welded to a plate as you say; my new one
looks like high-strength reinforcing bar twisted and welded - many times
stronger.
I would still try to avoid loading the longitudinal there though because
of the twist it would apply, I think any load should be applied as
nearly as possible through the centroid of the section.
CB
| -----Original Message-----
| From: [Email address removed]
[mailto:[Email address removed]]
| On Behalf Of Jon Wildsmith
| Sent: 19 November 2009 09:45
| To: [Email address removed]
| Subject: RE: [ELCO] tow hooks and underbody
|
|
| We probably should establish which type of towing eye we're taking
about
| because they're not all the same. Some 80's seem to have quite flimsy
| towing eye's, especialy if they have had a bull bar fitted that would
| interfere with something more substantial. The 'proper' ones are
twisted
| bar like a pig tail welded to a plate and seem to be very strong.
Which
| design did you twist Christopher?
|
| Best regards,
| Jon.
|
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| European Land Cruiser Owners Mailing List
| Further Info: http://www.landcruisers.info/
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G

Guest

Guest
Hi Christopher
So if using the holes in the front of the chassis which presently hold the
pig tails, it would be a good idea to spread the load by incorporating or
installing a bar or sheet of metal that would connect the two chassis frames
with the tow points.
This would reduce or eliminate that cross ways force you talk about on the
front of the cruiser is that correct.
cheers
john92hDj801HDT
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European Land Cruiser Owners Mailing List
Further Info: http://www.landcruisers.info/
 
G

Guest

Guest
John
You've got it right.
If you are planning to apply massive recovery loads then anything which
stiffens up the front of the car and spreads the load is good.
You can't eliminate sideways force, eg if you are being winched at an
angle out of a ditch, but a good solid bumper will spread it and also
allow you to choose the best point from which to pull.
Take a look at a tow-hook at the back of an existing 4x4: it will have a
spreader beam to take the load from the hook in the centre out to the
chassis on each side. On my LC80 there is also a plate connecting to
the centre of the rear bumper where the famous holes are drilled, but
this is clearly not the main attachment point.
For a front bumper I suspect that in order to avoid unwanted attention
from the Garda and safety people etc the best bet would be to design
something that will fit inside and behind the existing bumper, so that
it looks the same but is stronger.
I'd recommend strongly going to talk to an agricultural engineer in his
workshop. He will be used to making bits for farm machinery, he'll have
steel sections on the shelf, bolts, hooks, welding kits and - most
importantly - experience with working with big loads and making kit that
will survive it.
Interesting project! Let us know if you actually cut steel and make
something.
CB
| -----Original Message-----
| From: [Email address removed]
[mailto:[Email address removed]]
| On Behalf Of john
| Sent: 26 November 2009 09:26
| To: [Email address removed]
| Subject: Re: [ELCO] tow hooks and underbody
|
| Hi Christopher
| So if using the holes in the front of the chassis which presently hold
the
| pig tails, it would be a good idea to spread the load by incorporating
or
| installing a bar or sheet of metal that would connect the two chassis
| frames
| with the tow points.
| This would reduce or eliminate that cross ways force you talk about
on
| the
| front of the cruiser is that correct.
| cheers
| john92hDj801HDT
|
| --
| European Land Cruiser Owners Mailing List
| Further Info: http://www.landcruisers.info/
____________________________________________________________
Electronic mail messages entering and leaving Arup business
systems are scanned for acceptability of content and viruses
--
European Land Cruiser Owners Mailing List
Further Info: http://www.landcruisers.info/
 
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