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Thread: D2 front recovery points???

  1. #21
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    Exactly right, I've always wondered about how one can engineer something to crush at a certain rate but not stretch under an opposing rate.

    I have a custom winch cradle which fits behind the std bumper and outlets under the opening in the lower section. It's fixed directly to the chassis and recovery points, 2 x 8T eye bolts screwed into the winch cradle (10mm plate webbing on 230 x 75 parallel flange channel) and also a spread plate and nut behind. These were tested to breaking point, not torn out but the flange of the channel deformed and the eye bent at 20+T and were still in place at 30+T, after that we stopped. Any more the front of the disco is hitting someone in the head I think.

    Nothing stuck out forward of the plastic, was attached to the chassis and also sat onto the steering guard bar that's across the front so it can't rotate if it moved at all.

    In regard to "rating" I get everything I make for myself tested locally anyway. For example, I make my own receiver hitch points for rear recoveries. Manufactured from 4140 steel, chosen as it's used also as a high strength material used for tool holding and other structural applications I make a new pin as well to match. With a D1 bar scavenged from the wreckers, bolted to a test bed and a single line pull on a 6.5T shackle through the 4140 hitch & pin it actually deformed the bar slightly just before tearing the pin through the receiver at over 20T.

    My new planned front points will be made a bit lighter, but I was thinking of having a secondary backup for the point as a smaller steel cable run from somewhere back that is attached to an independent point on the recovery point or maybe to attach to the line/sling/???? so in the event of failure it's still attached and not flying off. Opinions???

  2. #22
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    After talking to ARB Queensland I posted in general chat in "MR Auto recovery points " some of the ARB product specification on the design & development of rated & tested recovery points, ARB are the only company in Aust.that is developing engineered points. Might be of interest to some, Bob
    I’m pretty sure the dinosaurs died out when they stopped gathering food and started having meetings to discuss gathering food

    A bookshop is one of the only pieces of evidence we have that people are still thinking

  3. #23
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    Quote Originally Posted by clubagreenie View Post
    Exactly right, I've always wondered about how one can engineer something to crush at a certain rate but not stretch under an opposing rate.

    I have a custom winch cradle which fits behind the std bumper and outlets under the opening in the lower section. It's fixed directly to the chassis and recovery points, 2 x 8T eye bolts screwed into the winch cradle (10mm plate webbing on 230 x 75 parallel flange channel) and also a spread plate and nut behind. These were tested to breaking point, not torn out but the flange of the channel deformed and the eye bent at 20+T and were still in place at 30+T, after that we stopped. Any more the front of the disco is hitting someone in the head I think.

    Nothing stuck out forward of the plastic, was attached to the chassis and also sat onto the steering guard bar that's across the front so it can't rotate if it moved at all.

    In regard to "rating" I get everything I make for myself tested locally anyway. For example, I make my own receiver hitch points for rear recoveries. Manufactured from 4140 steel, chosen as it's used also as a high strength material used for tool holding and other structural applications I make a new pin as well to match. With a D1 bar scavenged from the wreckers, bolted to a test bed and a single line pull on a 6.5T shackle through the 4140 hitch & pin it actually deformed the bar slightly just before tearing the pin through the receiver at over 20T.

    My new planned front points will be made a bit lighter, but I was thinking of having a secondary backup for the point as a smaller steel cable run from somewhere back that is attached to an independent point on the recovery point or maybe to attach to the line/sling/???? so in the event of failure it's still attached and not flying off. Opinions???
    Sounds like an impressive system. Any chance of some pics?
    D4 MY16 TDV6 - Cambo towing magic, Traxide Batteries, X Lifter, GAP ID Tool, Snorkel, Mitch Hitch, Clearview Mirrors, F&R Dashcams, CB
    RRC MY95 LSE Vogue Softdash "Bessie" with MY99 TD5 and 4HP24 transplants
    SADLY SOLD MY04 D2a TD5 auto and MY10 D4 2.7 both with lots of goodies

  4. #24
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    I have just installed recovery points from Philco. Not sure of the rating of these though. Have to get your own bolts. These can be obtained from uv4x4 in Brisbane. Costs about $150 after shipping to Vic.

    4x4 Intelligence is now 4x4 Design and Engineering. Michael Samootin runs this and was one of the partners of 4x4 Intelligence. You can search for his contact details in this forum.

  5. #25
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    This is it behind the tube bar I made, which is legal as it turns out as the original "deformable structure (steel backing of plastic bar) and crush cans are in place. The plastic bar needed the top corners of the lower opening cut square and then heat gunned to bend /curve back and smooth out the lines. You can see the eyebolts hopefully.


  6. #26
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    Ordered new xrox bar today.
    Last edited by Pedro_The_Swift; 7th June 2012 at 06:36 PM. Reason: you know why---

  7. #27
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    Quote Originally Posted by isolbar View Post
    I have just installed recovery points from Philco. Not sure of the rating of these though. .
    Currently there is no Australian Standard that relates to vehicle recovery points, nor an ADR requirement. There would be no rating on those recovery points, or any others, except the 5 recently developed by ARB for : Mazda BT50/ Ford Ranger
    Toyota Landcruiser 70 series
    Toyota hilux 2005 on
    Nissan GU Patrol 3.0 l 2002 on
    Bob
    I’m pretty sure the dinosaurs died out when they stopped gathering food and started having meetings to discuss gathering food

    A bookshop is one of the only pieces of evidence we have that people are still thinking

  8. #28
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    Quote Originally Posted by jwb View Post
    Given the ARB bull bar is directly bolted to the chassis and the tow points are integral with the bar, how will tow points on the chassis be any different? unless someone in your 'group' is going to do the engineering calcs. Also the recovery points on the market I've seen don't carry any formal ratings including the set I bought from ARB some years back.

    I certainly wouldn't be anywhere near someone using the factory fitted tie down point - even doubled up - for recovery rather than towing.
    IMO the 'eyes' on the D2 ARB bullbar are nothing more than something to hook your winch hook to, i would sooner use the original Land Rover towing eye than them, the bar is bolted to the crush cans, these are designed to deform in an impact, and as such are unsuitable for a shock loading if you want them to stay in shape and your bar not to end up hanging off the car further forward and pointing in the direction your last recovery vehicle was positioned. As one fella mentioned discreet mount winch trays are mounted behind the crush cans, between the chassis rails, in my opiniona recovery point mounted on a bar between the chassis rails with adequte strength and reinforcement would make the best recovery point (like a towbar on the front, behind the crush cans). I like the recovery points made out of ~10mm plate that replace the factory ones, but i'll never be comfortable recovering a vehicle from just one chassis rail and i don't like the triangulaton rope set ups (think pigeon toed chassis), Thats why i always recover vehicles from the back through the towbar and winch them if they need to be pulled out forwards (as if my car was stuck i guess, i'd winch it forward). But i do encourage people to buy the ones made by the mentioned sellers of uprated recovery points, although i'll never have them myelf as i custom fabricate everything to my specs, which is basically beef and bracing.

    Cheers
    Will

  9. #29
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    Quote Originally Posted by bob10 View Post
    Currently there is no Australian Standard that relates to vehicle recovery points, nor an ADR requirement. There would be no rating on those recovery points, or any others, except the 5 recently developed by ARB for : Mazda BT50/ Ford Ranger
    Toyota Landcruiser 70 series
    Toyota hilux 2005 on
    Nissan GU Patrol 3.0 l 2002 on
    Bob
    You can buy recovery hooks from everywhere that have 4.0t stamped on them.

  10. #30
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    Quote Originally Posted by tomalophicon View Post
    You can buy recovery hooks from everywhere that have 4.0t stamped on them.
    There are lots of generic tow hooks rated up to 10000 lbs or similar, but the design is not vehicle specific , and usually mounting of these is left up to the buyer, with no info on how or where to mount on the vehicle. This leaves the question of whether the surface they are mounted to can handle the load on the hook during a recovery. I am talking about recovery " points", not hooks, totally different animal. BTW., the hooks have been developed for the construction industry, no product testing has been done that is vehicle specific. Bob
    I’m pretty sure the dinosaurs died out when they stopped gathering food and started having meetings to discuss gathering food

    A bookshop is one of the only pieces of evidence we have that people are still thinking

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