Hey Old, you'd be suprised how much force can be applied with a screw (ie - puller). You say you had a 4 ton ram on the pin and that NO puller can apply that much force. Hate to tell you but OTC, and others, makes pullers with WAY, WAY more pulling/pushing power than 4 tons. Personally I've got one that is rated at 30 tons and several alot smaller than it is that are rated at least 5 tons. Beyond that, and maybe it's more of a 'special tool' than a puller, per se, but I've also got the rams and legs for pulling sprockets on CAT final drives. The two rams are rated at something like 75 tons puch and 73tons pull on the smaller one, and 103 tons push and 100 tons pull on the larger one.
Like I said there are many pullers/pushers that will do way more than the 4tons your talking about.
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