I have a pair of hydraulic lifting devices attached to a common mains electricity driven power pack. I want to make them individually portable with their own hydraulic power packs. Cylinder and ram dimensions are similar to the common import 3 – 5 – 8 ton devices sold as replacements for engine lifts and the like. Looking for a maximum force of around 2 tons but not normally expecting to need more than 1 ton.
Electrically driven power steering pumps off various cars seem to be readily available at acceptable prices, £50 – £100, from breakers. Look ideal for the purpose being compact and driven off 12V so could, should I ever need to, be used in the field where mains electricity isn't available. Question is whether they have sufficient output pressure and whether the control valving can be re-arranged or bypassed for pump up – bleed down control instead of continuous circuit. I guess I'd need around 1,500 psi delivery for my rams.
Alternatives appear to be the import air over hydraulic power packs or tipper trailer power packs both of which come in rather more expensive. I know that air over hydraulic versions of the engine crane replacement rams can be found for around £100 but I don't want to replace my good, industrial standard, rams with cheap imports.
Clive.