[Farmall] Hydraulic Pump

[Jim Becker]

This one isn't that kind of lock washer.  This one has a tab in the hole to 
keep it from rotating on ther shaft and part of the outer edge is bent up 
against one flat of the nut.  As long as the tab isn't damaged and there is 
some fresh area of the outer edge to bend up, it is OK to reuse.

Remove the hydraulic pump to see if it was assembled with another washer or 
if the nut is missing.

Jim Becker        jim.becker at verizon.net

----- Original Message ----- 
From: <szabelsk at gdls.com>
To: "Farmall/IHC mailing list" <farmall at lists.antique-tractor.com>
Sent: Wednesday, September 03, 2008 9:08 AM
Subject: Re: [Farmall] Hydraulic Pump


> There may be a nut bouncing around, or there may not be a nut bouncing
> around. This could be a case where the PO was working on the unit, dropped
> the lock washer, couldn't find it, and put in a new one. But to be on the
> safe side, I agree that you should check out the unit and verify that
> there is a lock washer where there should be. If the PO dropped the lock
> washer, couldn't find it, and just decided to put the nut in "a little
> tighter" you could wind up with a lot bigger problem later. Hopefully all
> you have to do is remove a pan or cover to get a good look at the
> assembly.
>
> In my line of work we never reuse a lock washer since there's no way to
> determine how many times it been used and how much tension is left in it.
> (The longer it is compressed, and what torque was applied, determines how
> much tension it still can provide after being installed the first time.)
> It may look like it's good, but it it's lost any of its tension
> capability, it could provide insufficient tension and allow a nut to back
> off. We always put new lock washers in when we reassemble anything. I've
> seen people take a totally flattened lock washer, spread the ends apart
> and put it back in. Not a good thing since there probably is no tension
> left in the lock washer and all they've done is put in a split flat
> washer. A lock washer is supposed to provide tension between the nut and
> the mounting surface, pushing on both and digging in a little, so that the
> nut won't turn by itself due to vibration.
>
> Carl Szabelski