My dad used to work at Braden Winch, in Broken Arrow,Okla.
www.bradenwinch.com --- there's "pro's and con's" for electric and for hydraulic... here's a handful for you to sort out and decide which are potential problems and which would be "non-issues" for your situation.....
downsides first:
Hydraulic---will work best with a large reservoir/sump and a separate cooling system (how far off of "optimum" would the straight set-up be? I don't know... depends on loading. every "stuck" is different*) this point could be a "non-issue"
already stated: truck has to be running
Hydraulic could, conceivably blow your power steering pump.
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This could be avoided by installing a dedicated pump, and not risking the steering... haven't done the research to see if this happens much (or at all, but it's conceivable---again, probably load-dependant, and *ESID )
Electrics have, sometimes, short duty-cycles.
If you're anticipating some long, heavy pulls, this might be a problem, but if it will be just for out-of-hole, or over the hump assists, this may not,especially if transmission/FWD are engaged, and just using the winch for a small advantage, rather than full-stress pull. *ESID
Electrics sometimes even burn up! ---this is avoidable, though everyone doesn't. (here's the tips from Dad. . Feed the motor with welder cable, (the bigger the better) and as large of an amp-reserve as possible. Before you panic and say "big amps is what burns'em!" consider this... . an electric motor has a certain amount of impedance to addn'l electrical current flow when it's spinning at it's proper rpm's (they become self-governing at that point)... when the rpms are sub-optimal, the impedance drops, and the voltage forces more amps thru the system... usually this addn'l power will re-establish the proper rpms. . if the r's continue to stay too low, the excessive amps will generate motor-destroying heat.
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One of the things that causes this chain of events to begin is power cables that are too small. they get warm, their resistance rises, the end-volts available at the motor drops, then the impedance/rpms drops... cheap cables lead to the loss of an expensive motor. Weak batteries will do this to you, too, so 3-4 strong 12V batts might be the difference between an "out" and a burn-out
Upsides:
hydraulic, properly set up, will pull all day, in case you've got a king-of-hill assignment for a 4x4 club event
hydraulic doesn't put much strain on the charging/electrical system at all (a few amps for the solenoid valves)
electrics are convenient and don't risk your PS pump
electric can be used with the engine "off" (might be important for a deepwater situation)
electric can be repaired if necessary. . when I was a kid, Braden was a contracted manufacturer for the Warn winch (1200-series?) The motor was a starter from a Ford V8... may still be. you could keep a spare in the booniebox "just in case"... . I doubt you'd want to do the same with a PS pump
if this were a perfect world, you could just get both, use a quick-connect system for either one, and choose in accordance with the situation... . Since this is not the case, think about which type of winch your offroading is most likely to destroy, and then pick the other one... . rm
[This message has been edited by rich m (edited 01-11-2001). ]