No Pete I think you are missing the point an extension spring will give too much movement before it tightens whereas a compression spring mounted correctly will be firmer but still allow the articulation you need but also provide a dead stop if something drastic happens eg wheels end up above your head. I would take a picture of our sprayer but it’s not here at minute but if you have a plate mounted to chassis then another plate mounted to box with say a 15 mm gap then a bolt through them both with a compression spring on the bolt also and big washer to hold spring in tension. So the ideal would be box sitting on one of your mounting balls in centre with the compression spring holding it down there job sorted. (As will I has pictured should explain it better either one each side or 1 bigger one in centre holding box down onto the ball)I like the look of those. Do they extend?
I think some of you are missing the point. There will be no compression of the springs at all, only extension.
Yes too easy to extend a spring is where I am getting at but ball in centre and compression spring holding it job sortedYes, Will and Gadget, that will work if it can give up to 4” compression.
Long story, but I was told it was much easier to extend a spring over such a distance than to compress one.
No Pete I think you are missing the point an extension spring will give too much movement before it tightens whereas a compression spring mounted correctly will be firmer but still allow the articulation you need but also provide a dead stop if something drastic happens eg wheels end up above your head. I would take a picture of our sprayer but it’s not here at minute but if you have a plate mounted to chassis then another plate mounted to box with say a 15 mm gap then a bolt through them both with a compression spring on the bolt also and big washer to hold spring in tension. So the ideal would be box sitting on one of your mounting balls in centre with the compression spring holding it down there job sorted
Yes too easy to extend a spring is where I am getting at but ball in centre and compression spring holding it job sorted
I see that , but the ball joint in the centre won’t work because 1, there is no room and 2, I have just spent the thick end of £2000 having the body shotblast and powder coated so there is no way we are drilling, grinding or welding it!!!!
I am using the existing Bredal fixing points, which are near the front and one either side. They lend themselves to being fixed to the side of the chassis.
I see your point entirely now that whilst extension springs will work in good going, it will take something different to work in the event of a slight disaster!!! The example above will give better lateral retention, I see that now.
Like I said a few posts ago, I’m not short of enthusiasm, just talent!!!
Yes, but they dont do off road the flexing of the lorry chassis is quite significant if it is like a unimog, The leaf sprung suspension has great load carrying capacity but the chassis needs freedom to flex independently,As he is operating no where near the chassis limits i suspect it will be OK however it is doneYou’d do well to spend an hour looking around a gritter lorry. Same concept no?
If you think the chassis is going to flex as much then it really needs to be 3 points of contact as there is zero flex in the spreader boxI’m going to email Southern Spreaders down under and ask how they mount the body on a Zetros.
I’m probably worrying about nothing, but the best time to get it right is the first time.
Ask the right people who know what they are talking about peteI’m going to email Southern Spreaders down under and ask how they mount the body on a Zetros.
I’m probably worrying about nothing, but the best time to get it right is the first time.
If the rear axle had more articulation would the chassis need to flex as much ? . I know it would involve loads of work but a trailing rod , panard rod and air bag set up could be fitted and incorporate a self levelling rear end .