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Farmall Tractors Discussion Board |
Re: Re: Re: Even more Farmall M questions
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Posted by john d on March 31, 1999 at 11:20:21:
In Reply to: Re: Re: Even more Farmall M questions posted by Gregory Travis on March 31, 1999 at 10:36:47:
Under that filler cap is likely a hydraulic pump. The steel wool is to trap dust. Actually, I don't think it was steel wool originally, just some sort of coarse fiber that acted as a dust barrier. The hydraulic pump is what the manual will refer to as a "lift-all" unit. It is simple in design, rugged if you keep dirt out of the system (no filter) and VERY heavy if you decide to remove it. It is a "single acting" system which supplies pressure, and then releases pressure back to the pump through the same lines. It is not "live" therefore only works when the clutch is engaged.
It has (or at one time had) 1 pipe outlet on the right side, and 2 on the left. To remove the unit, take off the control rod and lever which enter the tractor on the right side below the filler pipe. Then remove the filler cap and the pipe fittings on both sides of the tractor. Next, remove the little inspection cover on the bottom, and look for the coupler on the back side of the pump which drives it. This has a cotter pin to remove, and will slide out when you drop the pump. Last, remove the 4 bolts which hold the unit in place. BE WARNED: this thing will mash the unwary person who isn't ready for it to drop! The filler cap may be left in place as a "safety" to keep this from happening! Get some help!
On a lot of tractors which had the live pump added to the distributor drive, the old lift-all unit was used as a reservoir. Both of these units are available used, and as re-built exchange.
Replacing the clutch is not a terrible job, and the tractor does not have to be broken in two. The hydraulic pump has to come out to remove the clutch. It isn't necessary to remove the belt pulley drive on the top to work on either the hydraulic pump or the clutch. If you do take it off, however, it allows for an excellent place to shine a light on your work!
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