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Cracked hydraulic housing

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Rikiz

05-20-2003 08:23:13

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Have found an 8n for sale, front distributor. Tractor is in fair to good condition. Engine runs well with no smoke, and hydraulics lift a large blade with ease, and keep it up. However, when looking under the tractor, found that the hydraulic pump housing has several large cracks in it. Cracks are not leaking, and have not leaked over the past 2 weeks that it has been observed. What is the possibility that there is no internal damage and housing can be welded from the outside? And, if needed, where can a used pump be purchased and at what cost?

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Rikiz

05-21-2003 10:14:36

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Re: Cracked hydraulic housing in reply to Rikiz, 05-20-2003 08:23:13

Thanks for all your good comments. The info you provided is very helpful.

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ZANE

05-20-2003 19:34:59

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Re: Cracked hydraulic housing in reply to Rikiz, 05-20-2003 08:23:13

If it ain't broke don't fix it!

If it quits working then fix it. You an open a big old can of worms if you go welding on the pump.

Let sleeping dogs lie!

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9njoe

05-20-2003 11:44:20

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Re: Cracked hydraulic housing in reply to Rikiz, 05-20-2003 08:23:13

Rikiz,

If its cast iron, then braze it. If it is aluminum then TIG weld it. Brazing works best on cast iron. If you can, preheat the casting in your oven before brazing.

Joe

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David - OR

05-20-2003 09:30:00

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Re: Cracked hydraulic housing in reply to Rikiz, 05-20-2003 08:23:13

There's not a lot of stress on the base of the pump -- which kind of begs the question of how it managed to crack so badly.

The critical components are the pump chambers, the center housing, and the pressure passage from the center housing, through the base of the pump, over to the "test port", and up through the tube to lift cylinder.

If any of the cracks in the base propagate into the pressure passage, there will be a pressure leak. After this the lift will not stay up at best, or will fail to lift entirely (and pee hydraulic fluid on the ground) at worst.

Ideally, you should drop the pump and inspect it. But if you are sure all the cracks are on the edges of the base and well away from the pressure port, then it might be OK.

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markct

05-20-2003 11:31:36

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Re: Re: Cracked hydraulic housing in reply to David - OR, 05-20-2003 09:30:00

it most likely had water in it and froze, like ya said theres not alot of pressure there but it is one of the lowest points of the hydraulic system so water would settle there

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markct

05-20-2003 09:23:12

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Re: Cracked hydraulic housing in reply to Rikiz, 05-20-2003 08:23:13

i would take it out to weld it if it were me, alot easier to get a nice weld when your not laying on your back with hot sparks falling on ya. if its aluminum then it should be ok to weld it, however if its cast iron then you may not have very good luck

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Mountainman

05-20-2003 09:06:01

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Re: Cracked hydraulic housing in reply to Rikiz, 05-20-2003 08:23:13

I don't know much about pumps but some are aluminum and some are steel - might make a difference in deciding whether or not to weld - use a magnet to check.

Pumps are expensive and only availible used so far as I know.

hth

Mountainman...CA

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