Overflow

["Al Powell" <APOWELL@agcom.tamu.edu>]

> From: Gross Scruggs <GScruggs@wposmtp.nps.navy.mil>

> I am in need of experience and wisdom from the list.  My '87 5kTQ, 78kmi,
> acquired only three weeks ago, has among other problems the 'annoying' habit of
> pushing substantial amounts of hydro fluid out the top of the resevoir.  I've
> just replaced the cap/spring/float/gasket/switch assembly and it continues to
> blow fluid out until just below the 'low' mark, thereby setting off the bells
> and lights of the diagnostic system.  I know my hydraulic accumulator needs
> replacing and the pump needs rebuilding.  Is this resevoir problem separate or
> associated, and what is happening?  

Probably yes - although the backflow is not typical of these 
problems.  When the system is under pressure (running) take a REAL 
close look at the hoses in that system - if one was bulging, that 
could cause the fluid to flush back when the system was turned off 
and the pressure dropped - the hose would return to normal state.  
(Just an idea.....)

Another possibility: If you have an air leak anywhere, perhaps you're 
getting oil foaming and that causes overflow.  (Someone else had this 
specific problem within the last six months - perhaps it was Avi???)

Since you say your pump needs rebuilt, I suspect the latter cause - 
air getting in the pump.


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