I'm trying to think about this. From memory, most SWB had GVW of about 2800kg, and I'm sure they had two or three leaf springs. I've not been under one for a while, but if I happen to find one at work, I'll have a look.
You're best bet is to visit a local branch of Serck (Marston or Intertruck - whatever they call themselves just now), and ask them. There is quite alot of choice in transit springs, but they should have a catalogue listing all the variations and dimensions. Provided you get replacement springs with the correct eye to eye measurement and centrebolt location, then you'll only need new spring U-bolts. But fitting heavier duty springs will throw out the load compensating valve calibration, and that's not quite so easy to fix.
And fitting heavier duty springs won't stop the police from pulling you and escorting you to the nearest weighbridge.
I have a towbar fitted and even when its patialy loaded the tow bar sits too low. So all I want to do is to beef it up a bit and have the trailer (which is only small) sit level. I have considered just getting a pair of springs from the scrap yard and cutting off the spring eyes and putting them underneath the existing ones with longer U bolts if needed.
I can't imagine that I would be lucky enough to get it right first time. This Van has anti locks so I wouldn't expect a compensator to be fitted.
yes i'm thinking of replacing my 10yr old rear spings on my 3.5l intrepid. the heavest model. was wondering can i use springs meant for a heavier car to work n last longer? n big lots is carrying more in auto stuff.... any1 use oil additives?
No guarantee to them lasting longer. In fact they might not last as long as they'll be more prone to banging about on bumps when unladen/lightly loaded.
If your only problem is getting your trailer to sit level then all you need is an adaptor plate. I've one here.. It's a plate 5" wide and 1/2" thick with two pairs of 3/4" holes, one pair above the other. These are available (quite cheaply) with the vertical-spacing of the holes 2", 3", 4" etc. You choose the plate which, with the ball bolted through the upper pair of holes, gives your trailer 'a level ride'.
If my consignment's density is one-sixth that of water or more, then its volumetric weight is less than the normal weight in kilograms, whereas if its density is less than one-sixth that of water, then its volumetric weight is more than its weight in kilograms.
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