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Allis Chalmers Discussion Forum

WD Hydraulics

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02-06-2004 20:10:31

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Finally, I got my WD45 running and blading snow. Went to check the hydraulic reservoir, and there was barely any oil on the stick! I would like to change the remaining oil out and put in new. My questions are:

1. My owners manual says to use a "magnetic drain plug at the bottom of the housing" and "to completely drain the pump, the pump housing must also be drained". First of all, where are these located and what do they look like (the manual has no pic's of them)? Secondly, do you really drain two things or does it just sound that way? Finally, how do you know you when you have all the old oil out?

2. My IT Manual talks about bleeding the system using the gland nuts on the rams. Is this necessary? The owner's manual doesn't mention this.

3. Anything else I should know so as not to damage the system?


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02-07-2004 19:22:33

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 Re: WD Hydraulics in reply to ED (IA), 02-06-2004 20:10:31  
The plug is on the bottom in front of the PTO, under where the dipstick is on the side. There is another plug in the bottom of the hanging down part of the hydraulic pump, you have to look for this one. If you are using hydraulic oil and it isn't leaking out on the floor it is probably leaking into the transmission and you will have to split the tractor to replace these seals which are infront of the hand clutch. This is fairly involved. And it depends on how new the tractor is, they had a change at about 72000 to a different style seal and there is an upgrade kit for the older ones.

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02-07-2004 09:41:42

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 Re: WD Hydraulics in reply to ED (IA), 02-06-2004 20:10:31  
Check to see if any oil is dripping from your flywheel dust cover... If there is, you may want to leave the oil level at the lower mark, or the seal may leak more oil into the clutch area... The plug on the pump is right at the lowest part of it.. a 1/4" pipe plug. I have never completely drained mine..just pulled the plug to let any dirt out, then put it back in... I think that is what I would do, and drain the reservoir...then you don't have to even worry about bleeding the system... We have Always used 10/30 or 10/40 engine oil in ours...

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Kevin K.

02-07-2004 14:39:54

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 Re: Re: WD Hydraulics in reply to Ron, 02-07-2004 09:41:42  
I just purchased a WD and have some oil leaking from the flywheel dust cover. Where is the seal that is leaking and is it hard to replace?

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02-07-2004 19:17:52

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 Re: Re: Re: WD Hydraulics in reply to Kevin K., 02-07-2004 14:39:54  
If it is hydraulic oil it means the seal at the front of the hydraulic system is leaking, you must remove the engine.

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