Hydraulic fluid change

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   Hi all,
I just bought an Allis chalmers wd 1950's I believe which was converted to live hydraulics for the loader that is mounted.

I'm changing all of the fluids and I'm stuck at the hydraulic fluid. I don't know where the plug is to drain the hydraulic fluid. There's a box (reservoir) to the right of the tractor that holds the hydraulic fluid. It looks milky and low but there is no drain plug on the box (reservoir). If anyone could tell me how to drain the hydraulic fluid I'd appreciate it. Thanks in advance. IMG_9150_2017-08-30_08-19-42.JPG

Edited by D-Rock - 30 Aug 2017 at 8:19am

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D-Rock Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 30 Aug 2017 Location: Minnesota Points: 13	Post Options Post Reply Quote D-Rock Report Post Thanks(0) Quote Reply Topic: Hydraulic fluid change Posted: 30 Aug 2017 at 8:18am
	Hi all, I just bought an Allis chalmers wd 1950's I believe which was converted to live hydraulics for the loader that is mounted. I'm changing all of the fluids and I'm stuck at the hydraulic fluid. I don't know where the plug is to drain the hydraulic fluid. There's a box (reservoir) to the right of the tractor that holds the hydraulic fluid. It looks milky and low but there is no drain plug on the box (reservoir). If anyone could tell me how to drain the hydraulic fluid I'd appreciate it. Thanks in advance. IMG_9150_2017-08-30_08-19-42.JPG Edited by D-Rock - 30 Aug 2017 at 8:19am

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Tbone95 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 31 Aug 2012 Location: Michigan Points: 12324	Post Options Post Reply Quote Tbone95 Report Post Thanks(0) Quote Reply Posted: 30 Aug 2017 at 8:29am
	Well....how thick of material is the box? You could drill a hole in it if it's thick enough to make a decent plug of some kind. Or, you could siphon it out. And no, you don't have to suck it into your mouth. Take a hose long enough to put one end in the tank, and make a nice U shape in it where the top of the U is as tall as the tank. Fill the hose with oil so that you fill the U. Drop the end of the U down below the tank into a container, the falling oil will create enough vacuum to siphon out the tank. You won't get every last drop, but it should be OK.

D-Rock Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 30 Aug 2017 Location: Minnesota Points: 13	Post Options Post Reply Quote D-Rock Report Post Thanks(0) Quote Reply Posted: 30 Aug 2017 at 8:35am
	Thanks for the quick reply Tbone. I was wondering if I'd ha e to siphon it. The material should be thick enough to add a plug but for now I think I'll siphon it. Any idea on how full of hydraulic fluid the tank should be? Right now it's just above the hoses that run into the box, but the tank is only about 1/4 full.

Tbone95 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 31 Aug 2012 Location: Michigan Points: 12324	Post Options Post Reply Quote Tbone95 Report Post Thanks(0) Quote Reply Posted: 30 Aug 2017 at 8:47am
	Well Mr. Rock, to be completely honest, I have no clue. Perhaps very incorrectly, I assumed your system you're asking about is a bit on the "home made" side. If you could post a picture, maybe it's an aftermarket system somebody on here would be familiar with. I was just trying to offer a little advice from "Get By Engineering Company" So, if you want me to keep guessing, how much oil, enough that it will fully raise the loader, and not so much that it overflows the tank when the loader touches the ground. I'm not trying to be a smart aleck, just might take a little trial and error is all.

Hubert (Ga)engine7 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Jackson Cnty,GA Points: 6545	Post Options Post Reply Quote Hubert (Ga)engine7 Report Post Thanks(0) Quote Reply Posted: 30 Aug 2017 at 8:48am
	Welcome to the Forum. You could remove the reservoir and turn it upside down to drain it out of the fill opening but if you go that far you might as well weld in a drain plug for the nest time. With the loader cylinders collapsed fill it to within a few inches of the top especially if you plan to use the loader much.
	Just an old country boy saved by the grace of God.

D-Rock Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 30 Aug 2017 Location: Minnesota Points: 13	Post Options Post Reply Quote D-Rock Report Post Thanks(0) Quote Reply Posted: 30 Aug 2017 at 8:57am
	Tbone, I also assume it's an aftermarket system. I appreciate your input! I'll try to post a pic but I tried earlier and I don't think the pic posted. Hubert, Thank you! I'll get around to adding a drain plug at some point. Thanks for letting me know how far to fill the tank. I will be using it frequently. Here's the pic (if it works) IMG_9150_2017-08-30_08-56-10.JPG

DiyDave Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: Gambrills, MD Points: 54681	Post Options Post Reply Quote DiyDave Report Post Thanks(0) Quote Reply Posted: 30 Aug 2017 at 6:40pm
	I'd use one of these, to get oil out: http://www.walmart.com/ip/VEVOR-7-Liter-Fluid-Evacuator-Manual-Oil-Changer-Vacuum-Hand-Operated-Engine-Oil-Change-Fluid-Extractor-Pump-Tank-Remover/241484500?wmlspartner=wlpa&selectedSellerId=12347&adid=22222222227094333392&wmlspartner=wmtlabs&wl0=&wl1=g&wl2=c&wl3=216158674471&wl4=pla-378095483884&wl5=9007830&wl6=&wl7=&wl8=&wl9=pla&wl10=117430242&wl11=online&wl12=241484500&wl13=&veh=sem Its a handy gadget to have, and mine has served me well. Get the old stuff out, Then drill and tap in a pipe plug, on the bottom... I would leave about 2" from the top, at least, when refilling, maybe more, if your area is hilly... Adter seeing the pic, I'd also drill and tap in a breather fitting, on the top of the tank, too. lets the fluid expand and contract, as volume changes, with temp... Edited by DiyDave - 30 Aug 2017 at 6:43pm

D-Rock Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 30 Aug 2017 Location: Minnesota Points: 13	Post Options Post Reply Quote D-Rock Report Post Thanks(0) Quote Reply Posted: 30 Aug 2017 at 8:29pm
	That's a great idea Dave. Thanks! I ended up unbolting the tank from be frame and tipped the tank to empty the fluid like Hubert suggested. It worked great but took some time. I filled the tank with new fluid about 3/4 full since I my land is hilly in areas. Next time I change it I'll be adding a plug and I like the breather idea also.

Dakota Dave Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: ND Points: 3973	Post Options Post Reply Quote Dakota Dave Report Post Thanks(0) Quote Reply Posted: 30 Aug 2017 at 8:59pm
	All you need for a breather is cut slots in the threads on either the cap or the pipe it screws on just down deeper than the threads.