I got a new one-hand grease gun. It has a flexible hose and an end to
pump grease into a Zerk fitting.
So far, so good...
Yesterday, I used the thing to grease the loader for my Kubota tractor
and I had an odd problem:
I would fit the grease gun onto the Zerk fitting with no problem, pump
some grease with no problem, and then could not release the gun from
It had an odd "all or nothing" quality. For a while, the gun would
remain firmly attached to the fitting, then, it would seem to release.
Once released, it would slip off the Zerk easily, but, before that
point, I simply could not remove it.
What might be going on here?
Thanks for any help,
The business end of your grease gun loosens up to allow for the
difference in size tolerance of fitting. Just turn it a little bit is
all you need to do. Not all manufacters of fittings use the same
templates and sizes do vary, even on something as simple as a grease
On Sat, 13 Dec 2003 12:47:20 -0500, Kenneth
I appreciate your comments, but, it is not an issue of the fit of the
nozzle to the Zerk.
I say that because the nozzle slips on just as it should, and then,
after I pump, the nozzle becomes very firmly fixed on the fitting.
Eventually, the nozzle loosens on its own.
You were probably pumping against some resistance. Is the very front
of the schnozzle that fits over the zerk separate such that you could
unscrew it a; little? It's possible that it's just a little too tight
and when there is pressure it's holding on to keep the grease from
squirting out. Try unscrewing it a half turn before you put it on the
On Sat, 13 Dec 2003 12:36:17 -0600, firstname.lastname@example.org wrote:
You may be on to something...
The grease did pump properly, I could see it flow out of the joint as
it should. But the machinery I was trying to lube was very cold. I
will check to see if the nozzle has any adjustment.
This situation is a little hard for me to describe, but as I tried to
remove the nozzle from the Zerk, it did not act as if the nozzle were
too tight. It acted as if the nozzle were somehow locked on to the
Zerk. Then, when it released, it released fully.
It was something like this:
I would apply 40 pounds of pull, and could not remove the nozzle.
Then, a minute later, I would apply 3 pounds of pull, and the nozzle
would come right off the fitting...
I always pulled them of by bending them over at a slight angle maybe 20 - 30
degrees or so instead of pulling straight off. If you'll notice, the lub
guys on a lub rack do it that way too. Thinking back, I can't remember ever
pulling straight off even as a kid on the farm way back when.
I had tried that... but until the thing was ready to release, no
angle, no pulling, nothing that I could do would make it release.
Moments later, a slight tilt, and a gentle pull, and the nozzle came
off the fitting...
All the best,
all that is going on is the pressure is building up in the hose of the gun.
When you pump the gun the initial pressure locks the hose nozzle to the zerk
allowing you to pump one handed if the fitting will not take grease fast
enough or is plugged the nozzle will become one with the hose till pressure
3000 PSI. Sounds about right, that's why the coupler and zerk lock up while
injecting the grease. The pressure drops quickly and lets you pull the
fitting off the zerk . But if the zerk is plugged or the joint will not
accept grease (or fast enough) the unit locks together. BTW the fittings and
hoses are (should be) rated at 6000-7000 PSI
On Thu, 18 Dec 2003 17:23:27 -0500, "Bruce Christian"
I know that guns are rated depending on their configuration. The one
that is causing me the problem is a one-hand type and is rated at
5000psi. Another that I have has a level arm and is IIRC rated at
All the best,
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