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Old 10 July 2011, 19:22   #11
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Originally Posted by Polwart View Post
Stopping it at serious speed would be very "interesting". Although again that may be less of a concern for you than the average UK boater.
Yes - I rarely tow at more than about 30mph and while I haven't been on any long trips with it, that wouldn't change with the rural road conditions here. Might be 'interesting' if it happened with the Ranger, with the back end of a pickup being pretty light!
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Old 11 July 2011, 01:37   #12
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Many of the hitches are "adjustable" in that they have a nut or bolt that adjusts the amount of closure in the latch (i.e. how far the lock wedge goes in to trap the ball.) Usually they rust up pretty solid after a few uses, but could it be that it was loosely adjusted to begin with?

I have heard of dual and triple axle trailers having the hitch fail when backing over a change in incline, as when transitioning from a lot to ramp. It apparently doesn't take all that much to pop the ball loose.

jky
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Old 11 July 2011, 05:35   #13
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Personally I think the heavy duty cast hitches (Ifor Williams fit them to the bigger trailers they make) are a lot more confidence inspiring than the pressed steel hitches fitted to most smaller trailers. The cast hitch on my Ifor has a positive locking mechanism and I simply don't see any way it could come off unless something snapped. I don't really like the "locking" mechanism on any of the pressed hitches. My Ifor one is an Avonride like the CPLS235 half way down this page Hitch Heads

Greasing the ball is something that a lot of people here don't seem to do and over time I guess it leads to wear either on the ball or in the hitch.

I use the "lift it up with the jockey wheel" method to check as well. Well I did until the plastic jockey wheel broke new metal one arrived last week!
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Old 11 July 2011, 12:21   #14
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Curveball:

Would I be right in thinking your trailer is a US import? (this is a hazy memory from a long ago post, may not even be you) If not, ignore the next observation:

2" and 50mm are nominally similar........
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Old 11 July 2011, 12:22   #15
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Curveball:

Would I be right in thinking your trailer is a US import? (this is a hazy memory from a long ago post, may not even be you) If not, ignore the next observation:

2" and 50mm are nominally similar........
Yes, but a 50mm ball won't go into a 2" hitch. It's the other way round that's a problem.
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Old 11 July 2011, 13:53   #16
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Quote:
Originally Posted by 9D280 View Post
Curveball:

Would I be right in thinking your trailer is a US import? (this is a hazy memory from a long ago post, may not even be you) If not, ignore the next observation:

2" and 50mm are nominally similar........
You are correct the trailer is US origin but relatively new, and I believe that all the hitches fitted to their EU exports are CE compliant and therefore 50.0 mm rather than 2". Of course it is possible that someone mixed them up even though it is supposed to be the EU version of the trailer...

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Yes, but a 50mm ball won't go into a 2" hitch. It's the other way round that's a problem.
Emmm.... I think it would? A 50 mm ball should fit into a 50.8mm hole but be a shade looser than intended?
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Old 11 July 2011, 14:18   #17
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Emmm.... I think it would? A 50 mm ball should fit into a 50.8mm hole but be a shade looser than intended?
I stand corrected-I had it in my head that 1" was 24.5mm,rather than the correct 25.4mm
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Old 11 July 2011, 16:00   #18
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I wind up the jockey wheel so the hitch locks on, then give it a few winds to lift the back of the car very slightly above the normal unloaded driving position.

Me too... in fact, the only time I didn't (because I was going nowhere near a public road and only driving through the boatyard to the slip, a 21ft picton cruiser on tri axle trailer came off the back, and into the car which I stopped in front of it, so as to avoid it hitting any boats on hardstanding

so don't beat yourself up too much
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Old 11 July 2011, 20:22   #19
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Emmm.... I think it would? A 50 mm ball should fit into a 50.8mm hole but be a shade looser than intended?
Yes, and then it may well jump off ... using a 2 inch hitch on a 50mm ball is a bad idea!

I was once told years ago that a 50mm ball hitch should have a flat machined into the top of the ball whereas a 2 inch one didn't and was rounded. Not sure if there is any 100% way of telling about the trailer end though.
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