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Rear Tow Hook
Posted: Fri Jan 29, 2010 6:35 pm
by nick.falconer
Hi
I have a pajero and I am going to mount tow hooks front and rear. I've got the front figured out. But on the rear I cant mount it directly to the bottom of the chassis rails because of the leaf spring shackle mounts. And on either side there is the rear cross member. So I was thinking I can either remove the towball and attach a 3.25 shackle, but This way I'm worried that if a big enough pull is applied it will twist the rear cross member. Or I can get a bracket made up to mount where the towbar bracket currently is so that it pulls level with the cross member rather than from below.
This is a pic of what I was thinking
Thanks
Re: Rear Tow Hook
Posted: Fri Jan 29, 2010 6:38 pm
by red-devil
there is a guy whos makes them jut like that
muzzaduck is his trademe name
and i used to use on on my old girl
Re: Rear Tow Hook
Posted: Fri Jan 29, 2010 6:41 pm
by Sadam_Husain
nick.falconer wrote:This is a pic of what I was thinking
Yep but with a gusset(s) underneath to stop it bending
Re: Rear Tow Hook
Posted: Fri Jan 29, 2010 7:26 pm
by PR
Re: Rear Tow Hook
Posted: Sat Jan 30, 2010 4:10 pm
by new2zukes
where about in nz are you as i have one sitting here that i got professionaly made it was off my pajero but i have since sold that truck, i will post a pic later. dont want much for it but wont be worth sending it i dont think as it might be a bit heavy.
Re: Rear Tow Hook
Posted: Sat Jan 30, 2010 4:19 pm
by nick.falconer
I wish you had said so sooner cos I just bought the one off trademe.
Oh well thanks anyway.
Re: Rear Tow Hook
Posted: Sat Jan 30, 2010 4:28 pm
by new2zukes
Re: Rear Tow Hook
Posted: Sat Jan 30, 2010 7:54 pm
by CRAZYBUSTARD
the bolts look to small holding hook to bracket and hook dosent have cert weight eg4800 pounds
Re: Rear Tow Hook
Posted: Sun Jan 31, 2010 8:13 am
by new2zukes
factory hook off a hilux and the bolts arnt too small for the hook they are perfect fit.
Re: Rear Tow Hook
Posted: Sun Jan 31, 2010 8:24 am
by northland_pajero
Im looking for a rear hook for my pajero, I have sent a pm.
Re: Rear Tow Hook
Posted: Sun Jan 31, 2010 8:28 am
by dazza85
new2zukes wrote:factory hook off a hilux and the bolts arnt too small for the hook they are perfect fit.
There is the problem right there ... these are not rated and are for "towing only" they break instead of straightening ... or the bolts shear when used for snatching ...then the potential for injury or death is very great
Don't just take my word for it ... do a search on here for all the info
Re: Rear Tow Hook
Posted: Sun Jan 31, 2010 8:35 am
by Sadam_Husain
dazza85 wrote:There is the problem right there ... these are not rated and are for "towing only" they break instead of straightening ... or the bolts shear when used for snatching ...then the potential for injury or death is very great
Don't just take my word for it ... do a search on here for all the info
I always thought those factory toyota hooks were strong and didnt break despite that they dont have a load rating stamped on them, the only problem I think can remember reading anywhere is the captive nuts failing on the front of suft chassis?
Re: Rear Tow Hook
Posted: Sun Jan 31, 2010 9:08 am
by new2zukes
that is correct i have just read the thread that says that but i have also found some breaking loads which was quite shocking really, you said that rated hooks bend/straighten instead of FACTORY hooks that break off this is from another thread talking about tow hooks.
NJV6 wrote:Sadam_Husain wrote:Did you find that old thread somewhere, have you got a link to it?
I found this one. What I find interesting is the tow ball snapping at 8 ton, substantially up on some of the rated hooks that also snapped.
I have carried out several hook tests on a test rig.
The bighorn hook with 10mm bolts snaps the bolts around 5 tonne
Drilled out to take 12mm bolts the hook snaps, nowhere near the drilling, at around 6 tonne
The Black Rat Black hook snapped around 5 Tonne
The Black Rat Chrome hook straightened around 5 Tonne
The Supa Cheap Ridge Rider Black hook snapped around 8 Tonne
The Bush Ranger Black hook straightened around 5 Tonne
3/4 shank towball snapped around 8 Tonne
The Snatchmaster hooks from Cookes straighten around 9.8 Tonne, this opens a new can of worms as the M12x1.75 bolts broke first.
Pintle Hook/Nato Coupling stripped the 10mm mounting bolts ie Patrol, around 12 Tonne
Pintle Hook with 12mm 8.8 bolts stalled the test rig around 20 Tonne
The Pintle tests were a straight on pull, an angled pull would load 2 bolts more with a leverage factor accross the mount face
All these tests were a increaseing load pull, not a snatch which could lower the results.
So where do you stop? The snatchmaster hooks being ideal as they straighten at a high load but the supplied bolts not up to the job. So snatchmaster hooks + 1/2 inch grade 8 bolts, then you'd need a pretty good anchoring point to take 10 ton.
KiwiBacon wrote:How does a badly made hook from china qualify as "rated"?
Interested in your comp program. Bear in mind all the ones even the cheap chinese ones tested did 5 ton which is near enough 10k pounds.
'northland-pajero' (on this site) has just bought my tow hook mount and i have told him about this little discusion and he now he is aware of what has been said he may or maynot replace with rated hook but atleast he is informed.
Re: Rear Tow Hook
Posted: Sun Jan 31, 2010 9:30 am
by northland_pajero
After reading that post I will be replacing the hook.
Good to have a bracket to mount the rear hook on, cheers.
Re: Rear Tow Hook
Posted: Sun Jan 31, 2010 9:38 am
by tallsam66
More often than not the problem with failing hooks is where & how they are attached, the method used for recovering & how hard its stuck.
There are as many different theories & ideas between hooks , pintles & hitches etc etc & which is best for certain applications.
Its a massive can of worms
Re: Rear Tow Hook
Posted: Wed Feb 03, 2010 2:25 pm
by nick.falconer
To attach the bracket to the car is there are specified torque for the bolts or just do them up tight. And should I be replacing the bolts or will the current ones be fine?
Re: Rear Tow Hook
Posted: Wed Feb 03, 2010 5:56 pm
by northland_pajero
When I bought a bolt on towbar that uses the same mount I found the factory bolts did not go right through the nuts, so I bought some longer high tensile bolts to mount the tow bar, I will use them for the hook bracket too
Re: Rear Tow Hook
Posted: Sun Feb 07, 2010 1:46 pm
by nick.falconer
The brackets and hook is now mounted. I ended up having to buy shorter bolts as the hook bracket is thin than the towbar bracket.
This is it mounted
And this is with the rear door open above the hook. You can't tell in the photo but there is only about 5mm between the hook and the door.
Now I just need to mount the front one.
