Hydraulic pump and ram capacity

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   I inherited my father's WD45 and am rebuilding it. Apparently he changed the hydraulics from the back of the tractor to the front to operate a snow plow. I replaced the single unworking ram with two new large rams. (The plow is extremely heavy). I've gotten everything running and no oil pan leaks, but now I have a leak coming from behind the fly wheel cover. I believe it is either a faulty gasket between the hydraulic and bell housings leaking oil from there. Or the rams I bought are way too big for the pump to handle, creating too much pressure. I've looked in all three manuals I have and online to find the capacity of the hydraulic pump on this tractor and what size rams can be used, but have found nothing. Is anyone familiar with this or can possibly guide me in the right direction? I'm hoping the rams are too big because I'd rather not have to split the tractor to replace that gasket.

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JTS Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 6 hours 4 minutes ago Location: 28729 Points: 2	Post Options Post Reply Quote JTS Report Post Thanks(0) Quote Reply Topic: Hydraulic pump and ram capacity Posted: 5 hours 54 minutes ago at 9:51am
	I inherited my father's WD45 and am rebuilding it. Apparently he changed the hydraulics from the back of the tractor to the front to operate a snow plow. I replaced the single unworking ram with two new large rams. (The plow is extremely heavy). I've gotten everything running and no oil pan leaks, but now I have a leak coming from behind the fly wheel cover. I believe it is either a faulty gasket between the hydraulic and bell housings leaking oil from there. Or the rams I bought are way too big for the pump to handle, creating too much pressure. I've looked in all three manuals I have and online to find the capacity of the hydraulic pump on this tractor and what size rams can be used, but have found nothing. Is anyone familiar with this or can possibly guide me in the right direction? I'm hoping the rams are too big because I'd rather not have to split the tractor to replace that gasket.

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DSeries4 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Ontario, Canada Points: 7598	Post Options Post Reply Quote DSeries4 Report Post Thanks(0) Quote Reply Posted: 1 hour 15 minutes ago at 2:30pm
	The leak is not related to the cylinders. Most likely the input seal on the torque tube needs replacing - could also be the rear main on the engine. Either way, you will have to split it. Those new cylinders are probably not going to work. The hydraulic system is a high pressure/low volume set up. New cylinders are the opposite. This means they will move very slowly. Stick with the original cylinders that were made for the tractor. They will work well and are very strong!
	'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 22538	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 11 minutes ago at 3:34pm
	The hydraulic sump only holds 6 quarts of oil to begin with. If you have two double acting rams larger than 1 1/2" you might be overfull of oil and it is leaking out the vent hole, which happens to be inside the bellhousing above the clutch shaft. Check the hyd oil dipstick while rams are fully extended AND fully collapsed. It can't be overfull or it will leak.