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Massey Harris & Massey Ferguson Tractors Discussion Forum
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back hoe attachment

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eric wood

10-17-2003 09:34:12




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I have a MHF202 with a davis company/ midwestern industries model 102H loader backhoe. does anyone know where I might find info on it? I need to change the fan belt and can not figure out how to get the pump drive shaft out. I'm about ready to cut it and figure out how to fix it later.




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Iowa Dave

10-18-2003 14:35:30




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 Re: back hoe attachment in reply to eric wood, 10-17-2003 09:34:12  
Eric,
I gotta' go with Big Dean on this one (Like anybody'd be foolish enough not to). Just got done wrestling with this one myself while replacing the front pivot pin bushing. The shaft is reverse threaded into the flange that bolts (W/ rubber bushings) onto the face of the crank pulley. As you know, the other end is keyed into the hole in the hydro pump. My pump key was so beat up I couldn't get the pump off at first either. Luckily I didn't start to wrestle with either end of this shaft problem until the whole front end was off. As I recall, even though your pump is off, there's not any of the shaft sticking out to get a grip on. I didn't have anywhere near enough exposed on the other end to get a grip on either. My Uncle took the rubber bushings out, put the heat wrench to the flange, and, with 5lb hammer and drift punch to the inside of a bolt hole, beat heck out of it. I was a dubious spectator and worried about the eventual condition of the hole, but after about 3 whacks (In the appropriate reverse-threaded direction) the flange spun off the shaft.

I remember thinking all that work would suck if all you wanted to do was change the belt(!). Can you pull one end of the tie-rods and loosen the front axle mount bolts to get enough clearance for the belt to go through?

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Dan Heffernan

02-25-2005 15:11:53




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 Re: Re: back hoe attachment in reply to Iowa Dave, 10-18-2003 14:35:30  
I have this same tractor and backhoe attachment and today my loader stopped working. It would not lift. I have found out that the pump drive is just turning around like a shear pin is broken. Is there a shear pin? If the shaft screws in like some are saying here then why would it just be turning without any resistance?



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Big Dean

10-17-2003 20:52:03




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 Re: back hoe attachment in reply to eric wood, 10-17-2003 09:34:12  
That shaft has counterclockwise threads that screw into the adapter plate that bolts to the crankshaft pulley. They can get rather tight. If I can be of further assistance on this Email me



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R. Marg

10-17-2003 10:57:08




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 Re: back hoe attachment in reply to eric wood, 10-17-2003 09:34:12  
you should be able to unbolt the pump and pull it back and that should also pull the shaft back or at least that is how it works on all the tractors I have with that type of set up but I also know it may be some sort of other hook up then what I have but I hope this helps any way



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eric wood

10-17-2003 14:59:20




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 Re: Re: back hoe attachment in reply to R. Marg, 10-17-2003 10:57:08  
I have the pump off and the bolts off the flange that is on the pulley of the engine but it does not move foeward enough to get the belt out or in without damage. I see no set screws and have drilled and tapped the end off the shaft and tried and slide hammer and it won't move. What next?



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GaryF

10-18-2003 13:59:20




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 Re: Re: Re: back hoe attachment in reply to eric wood, 10-17-2003 14:59:20  
Eric bolt the plate back to the pulley if out.If you have 2 piece flanged shaft bolt it back to gether (loosely). As Big Dean said the shaft is threaded in counter clockwise (to the solid piece inside the crankshaft pulley) use a pipe wrench(on shaft between flange and rad) to turn it out.If you have a 2 piece flanged shaft then you would undo the flanged section. Make sure when you put it back in that you use Never Seize on all threaded parts. (for the next guy!)
Gary

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R. Marg

10-17-2003 15:45:31




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 Re: Re: Re: back hoe attachment in reply to eric wood, 10-17-2003 14:59:20  
does it move in or out any you shouldn't have to take the part off the crank pulley sounds like you have some wear on the shaft that drives the pump and what has happened is it has turned so the splines of the shaft is locking it in if the plate is still on the pulley the shaft should pull out with no trouble the plate on the crank bolts on with 4 bolts Right? it has rubber sleeves that the bolts go through?if so you need to hold the plate with 1 hand and turn the shaft with the other to line up the splines and slip the shaft out then let me know or e-mail me

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eric wood

10-18-2003 05:17:48




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 Re: Re: Re: Re: back hoe attachment in reply to R. Marg, 10-17-2003 15:45:31  
Thanks yes it does move and it does have the rubber parts in the adapter which are pretty well shot. I'll put the bolts back in and try to get it apart today I'll let all know. As you see it may be threaded or splined so we'll find out.



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eric wood

10-19-2003 06:00:55




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 Re: Re: Re: Re: Re: back hoe attachment in reply to eric wood, 10-18-2003 05:17:48  
Well it's apart and it is threaded. The shaft is wore bad it has beed rubbing in the front of the tractor so much that it is half gone and the holes in the plate are also worn bad. I'll have to drill new ones. Do you think it will work surported by the engine and the pump as the bushing in the frame are long gone?



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Guy

11-06-2003 20:58:32




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 Re: Re: Re: Re: Re: Re: back hoe attachment in reply to eric wood, 10-19-2003 06:00:55  
Eric, being such a nasty job to do, I would replace the shaft and the crack adaptor. Check under this sites Tractor Parts, I think I have seen those parts for sale.
The easy way to unscrew that pump shaft is to have an old pump shaft with good spline, cut the gear section off and have a nut welded to it so you can put an impact wrench to it. Unscrewing your hyd pump drive shaft from the crank plate will be a piece of cake.
I also found that by loosening the front axle bolts and prying it out will give you enough room to remove the alternator belt.
Cheers.

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