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Discussion Starter · #1 ·
Hello everyone. My name is Mike, from Hastings, Michigan. I have a 1983/1984 Case 446 Garden Tractor. I have had it since it was new. It now has a Vanguard 18 horse engine. I am now on my 4th hydraulic pump. The last time I changed the pump I had a different engine. I installed the pump, filled up the fluid, and it has worked well for several years. A week ago I blew that pump. I happen to have an extra, but thought I would look for another pump, and can't find one (which may be a problem the next time I need one), and if anyone has any suggestions about where I should keep in mind, and the pump I would need, I would appreciate it. The pump I have now is a D2AA2A purchased, I believe, from Grainger, but I don't find that pump there, or anywhere now.

Anyway, the reason for my post. It occurred to me that I should drain all of the fluid out of the machine, in case it has water, or pieces of metal in it. Most of the fluid came out already, when I unhooked the hoses. But I don't know how to drain the fluid out of the parts that don't readily drain by unhooking the hoses. Any help? Thanks

Mike
 

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Bennieo said:
Anyway, the reason for my post. It occurred to me that I should drain all of the fluid out of the machine, in case it has water, or pieces of metal in it. Most of the fluid came out already, when I unhooked the hoses. But I don't know how to drain the fluid out of the parts that don't readily drain by unhooking the hoses. Any help?
Mike - Welcome to the forum! Check out the tech section - hours of useful reading there. Also, the "search" feature works great. :thumbsup: HERE is a link to a thread I found by searching the term 'drain'. Hope this answers your questions.
 

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Discussion Starter · #4 ·
No I haven't been. I did not realize it needed to be done. I do now.
The tractor ran for 18 or 20 years before the first pump went. Never changed oi. It went bad when someone vandalized my tractor by putting graved in the holding tank. I could see the other vandalizm, but not that.

The second failed within a year of being replaced.

The third is the one I just took out and it turns out is is not bad.

So now I don't know why the tractor will not engage in gear. Just before the tractor stopped, a line let loose and I lost all the fluid. I replaced the fluid, the tractor ran fine, and I was about to finish rototilling, took the hose off the rear hydraulic gear to hook to the rototiller, heard a metal on metal sound, and from then on, no motion.

I am trying to learn about the hydraulics, and trying to figure out if the hydraulic control valve could be bad. From what I read, that seems to be rare.

Mike

But, I like doing things myself, so I will take the hydraulics apart piece by piece if I have to to figure this out.
 

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Mike,
Let's take this on a step by step basis so that we are on the same page here.

Your tractor has a two-speed trans-axle with a shifter just below your legs when you are sitting on the tractor. Are you able to move that shifter from Lo Range to Neutral and to Hi Range OK? I ask this question because you are saying "the tractor will not engage in gear" and the trans-axle is the only place where gears are. Please respond on that issue first. It may be that you have broken bolts inside the trans-axle and if so, you do not want to be moving this tractor one inch.
 

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Discussion Starter · #6 ·
Ok. I do have that lever, and I can move the lever from high to neutral to low. I get nothing in any position. Or at least i didn't before I took the pump out. I will be putting it back together but I am waiting for a new lovejoy coupler and spider. I won't know what else to check until I get it put back together.

I appreciate very much you help, hydriv and Rob_P
 

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I would suggest that you do a thorough flush of the entire hydraulic system prior to installing the pump. This is not a fun job to do but if foreign material has been introduced into the system, then you must be certain that all of the contaminated oil is removed. Right now, there is still residual oil in the oil cooler, mid-mount lift cylinder, drive motor, rear pto valve, travel/lift valve and all connecting lines. The largest amount of old oil is residing in the cooler, the mid-mount lift cylinder and the 3 point hitch cylinder if you have a 3 point. It is a simple matter to disconnect the hose going into the bottom of the cooler and let the oil drain out. You can pour clean oil through the cooler if you disconnect the upper hose. The cylinders can be disconnected, removed and then pumped dry by pulling and pushing the cylinder rod in and out all the way. The reservoir should be removed from the tractor completely and thoroughly washed out with a solvent and then inspected with a light placed inside and the use of a small mirror on a wand. Once the pump is put back in, you can fill the reservoir with the cheapest oil you can find and run that through the entire system (engine running) for a few minutes and then drain it. I would do this at least twice before refilling with a decent quality 15W40 motor oil. I cannot stress enough just how important it is to have clean oil in the system at all times. Anything less is just grinding away at expensive components and shortening their life by a huge margin.
 

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Discussion Starter · #8 ·
Again, Thanks for the help.

I took your advice, and took the hydraulics apart, put everything back together, and put in a slightly cheaper grade of 10W30 oil, which I am getting ready to drain out, hoping it will take any impurities with it, and replace it with Rotella 15W40. However, before I do, I want to replace a hose I think could stand to be replaced. I cannot find the hose anywhere. I have looked at all of the suppliers on this site, have looked at all the discussions, and cannot find where to order the part. The part comes out of the 1983 Case manual, part 28 on page 57 of the manual, Case part number C 17224. Any ideas where I can get that part?

Thanks again.
 

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Bennieo said:
However, before I do, I want to replace a hose I think could stand to be replaced. I cannot find the hose anywhere. I have looked at all of the suppliers on this site, have looked at all the discussions, and cannot find where to order the part. The part comes out of the 1983 Case manual, part 28 on page 57 of the manual, Case part number C 17224. Any ideas where I can get that part?
Have you contacted Brian Hildreth? He should be able to get that hose for you. In the meantime you can go ahead with the other repairs because replacing this particular hose won't require draining the system or cause any particular problem other than perhaps with the attachment lift.
 
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