[Farmall] Slow Cub Oil Pressure

[Jim Becker]

They will prime by filling the oil filter housing.  Oil will back-flow into 
the opposide end of the same passage that the plug on the left side reaches. 
The hydraulic lines are in the way for the plug and it is sometimes hard to 
remove.  So I have just used the oil filter method when I have needed to 
prime one.

I have seen another cause of oil pressure that seems to come up slowly.  If 
the gauge itself is gummed up, it can be slow to register.  You will have 
pressure but it won't show right away.  In this caase, it will also usually 
be very slow to apparently loose pressure when you shut it off.  I don't 
think this is what is happening on your tractor.  The noises you describe 
indicate the pressure actually is slow to come up.

My best guess is that the pump is badly worn or the pickup tube has come 
partly loose.  It doesn't sound like a problem to ignore.  It may cost you a 
crankshaft if you do.  I would drop the pan and check the pickup tube.  It 
is not unusual for people to find them loose.

Jim Becker        jim.becker at verizon.net

----- Original Message ----- 
From: "Roger Moffat" <rogerkiwi at aol.com>
To: "Farmall/IHC mailing list" <farmall at lists.antique-tractor.com>
Sent: Tuesday, September 18, 2007 8:54 AM
Subject: Re: [Farmall] Slow Cub Oil Pressure


> Carl
>
> On Sep 18, 2007, at 9:23 AM, szabelsk at gdls.com wrote:
>
>> Try
>> priming the pump before you start the engine and see if it makes a
>> difference in how fast the oil pressure builds up. It priming
>> solved the
>> problem then start looking for why the oil in the pump drains and you
>> loose the prime. I've heard that sometimes the pump needs to be
>> primed if
>> the tractor sits too long.
>
> Thanks for this hint. Digging into the service manual has showed me a
> picture of where the priming plug is, so I'll give that a go next
> time this happens.
>
> "The priming plug is a 1/8-inch plug located at the rear left side of
> the crankcase near the top of the flywheel housing".
>
> Removing that and squirting some oil in there will be easier than
> taking the top off the oil filter I guess, and a bit more direct,
> although the diagram shows that the outside of the oil filter does
> connect to the outlet of the pump, so my putting oil in there
> probably wasn't entirely fruitless.
>
> But yes, eventually it's going to need some work and $$$.
>
> Cheers
>
> Roger