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Farmall & IHC Tractors Discussion Forum
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Help! 450 Hydraulics Problem

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Al

09-11-2003 17:53:07




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This evening I took the 450 for another spin. I've had this tractor for about 2 weeks and am still getting familiar with it. For some reason, I don't know why, I pulled the inside, (left hand) hydraulic lever back. The tractor started laboring, like it was pumping hydraulics as hard as it could. Couldn't make it stop, no matter which way I moved the lever. I have been debating trying to repair my hyd. pump or replace it, since it's leaking from the back. It pretty much decided that for me as fluid began to POUR!! out the tach. connection. If you kept moving the rear hitch up and down, that took the system off high pressure enough that it didn't labor. NOW WHAT?? I assume something is hung open or shut inside. How can I un-stick it??

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Evans

09-12-2003 08:50:50




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 Re: Help! 450 Hydraulics Problem in reply to Al, 09-11-2003 17:53:07  
probably too much leakage past the control valve spools due to wear.you will have to enlarge the orifice in the pressure regulator valve to overcome this.This orifice can be removed with a screwdriver after taking the cover off.You will need a new gasket.Do not enlarge it too much or you can't get it on high pressure.



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Aces

09-11-2003 19:57:13




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 Re: Help! 450 Hydraulics Problem in reply to Al, 09-11-2003 17:53:07  
Al the valves on the 450 could be set for single or double action by turning the spool just a little they had a smal roll pin for a stop if this get out of adjustment it can cause high pressure. the best wat to tell this is take off the right hood there should be a saft out the top of each valve with wrench flat and a clip on the valve cover you well see there the roll pin should be under the clip see that they all are set single or double. if roll pin broke replace.

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Red Rider

09-11-2003 19:50:51




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 Re: Help! 450 Hydraulics Problem in reply to Al, 09-11-2003 17:53:07  
Al, It sounds to me like your pressure regulator is not functioning correctly. If you don't have a hydratouch manuel you should get one. The regulator is not that hard to pull apart and see what has hung up.



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