I have a 1948 3600, that has a factory installed ( I am told) hydraulic pump for a bed dump. Does anybody know any details on this, mine is not currently operational due to leaking seals on the lift cylinders, that I hope to soon fix. Any info on this setup would be appreciated . See photos
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belt driven means it is running the whole time the engine is on, pumps wear out even if not under load, but it's gonna be a functions of the pump quality and the cleanliness of the oil circulating in the system
i think when a pump is direct connected to an engine it's referred to as a "live pump" old timey tractors had options for live pumps and ones that were engaged via gears and the clutch for this reason
the live pumps were not ordered as regular equipment unless there was a good reason for it my 1950 farmall tractor had a live pump, it is so worn out it could not operate anything, it has the same big round filter as in that first photo -s
With a little creative machining it might be possible to adapt an air conditioner compressor clutch to a hydraulic pump to avoid the problem of the pump running all the time. I don't know if the torque capacity of one of those clutches would be sufficient for heavy hydraulic loads, however. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
I'd suggest (wait- - - -I already have) removing ALL the belts to evaluate what's happening inside the engine. Once you figure out if there's an internal problem, start reinstalling belts one at a time. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
hi mick53, 5 of the 6 trucks i have came with PTO driven hydraulics for the bed lift, 3/4 ton to 2.5 ton, all similar looking pumps that are inside their reservoirs (black box with PTO input and a up/down lever) they were not factory, but the trucks were designed with installing a bed lift kit in mind many trucks would get the lift installed by the dealer so you could start using it as soon as it was home
the pump isn't fast, but it's quite tight, if you don't stop it you can hear the engine RPM drop very sharply as the rams bottom out. if you forget the PTO on and go for a fast drive i was told you could pop the PTO housing off the transmission and be left with broken gears and castings.
the PTO is a lot more power than any belt can output, at idle speeds it looks to be turning a about 100 rpm or so, you can always pull out the throttle to make it spin faster, but that's never necessary with the pumps on my trucks full over load of gravel goes up at any RPM, just goes up slower -s
