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Farmall & IHC Tractors Discussion Forum
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400 - 3 different leaks

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SDE

09-09-2006 19:42:49




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My snow plow frame leaks down in about two days. With the hoses unhooked it stays up. Which hydraulic system compotent is leaking. Spool valve, pump, or something else?
With the hose disconnected the quick disconnect will dribble oil forever. Do they wear out? Replace or repair?
I was cutting the grass along the road. The right side tires were running about a foot lower than the left side. When I came back up on to the road to turn around, I had a steady stream of HY-TRAN on the back top. What seals will need to be replaced? She was low about 4 gallons. Tomorrow I will mount my homemade 3pt on her. I hope it goes well.

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Janicholson

09-10-2006 08:50:29




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 Re: 400 - 3 different leaks in reply to SDE, 09-09-2006 19:42:49  
I agree with Jossette,
The most likely place is the spool valve. Its job is to prevent flow in that direction when in neutral.
Be sure the lever and link on the valve are returning it to center, and be sure the little selector switch is firmly in the correct position for the type of cylinder being used. It is a flat sided knob with a roll pin sticking out that clips under a sheet metal strip.
exchanging two valves in the stack may let you know which one is leaking (though it does require removing stuff that is in the road. One tactic that works is to set the bucket down on some concrete blocks when not being used for a few days. This is safer (for guests and children), and prevents continuous pressure on the hoses and seals. The blocks keep the bucket out of the dirt, and allow the unit to be moved if it fails to start. Just a few Ideas, JimN

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SDE

09-10-2006 15:06:16




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 Re: 400 - 3 different leaks in reply to Janicholson, 09-10-2006 08:50:29  
THank you both. I tried too turn the single or double selector switch months ago. They had not been moved in so long that they were real stiff. I will check them again to see if I can move it some more. SDE



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Jossette

09-10-2006 07:31:59




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 Re: 400 - 3 different leaks in reply to SDE, 09-09-2006 19:42:49  
third party image

the couplers are shot. replace

If oil is leaking that much, you should be able to find the seal where it is leaking and replace

good luck with the 3pt..



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