m belly pump

Anonymous-0 · Nov 21, 2009

Is there any advice on replacing the input shaft seal on an M belly pump. Thanks

Andrew Z · Nov 21, 2009

its easy. you just need to jam the pump gears with a brass rod and thread off the drive end. then remove the cover replace seal and gasket. hardest part of the job is getting it back up there. 3 guys works out best two hold the pump up with a rod 3 person makes sure the coupler stays in place and thread the bolts.

Andrew

47M · Nov 21, 2009

Check the archives for different ways to remove the belly pump and reservoir so you can work on it. It's heavy, and top heavy, so it will try to tip over once it's lowered out of the tractor, so be ready.

The coupling on the pump will probably be on there tight, and you have to remove the coupling to replace the seal. Some have been able to get the coupling loose without separating the pump from the resevoir, but mine was on too tight.

Once you have the pump separated from the reservoir, insert a flat piece of steel up the square tube and into the pump gear teeth to keep the shaft from turning, then use a hammer and a short brass rod to loosen the coupling. "Lefty loosey, righty tighty". Mine took a lot of persuasion to loosen up.

Once the coupling if off, the old seal will come out and you can install the new seal.

When reassembling, the control lever can be tricky to get installed correctly so it will activate the pump. Took me a couple of tries before I got it back on correctly.

Charlie M · Nov 21, 2009

A floor jack works well for lowering and raising the pump - just need a second person to steady it as it is going up or down.

sflem849 · Nov 21, 2009

To Hijack:
Is it possible that this rod could come out in normal operation? My MD feels like the rod is not attached to anything in there. My H on the other hand just won't lift the disc...

m belly pump

Anonymous-0

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Andrew Z

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47M

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Charlie M

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sflem849

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