5030 I am confused, if I throw away the ridgid tube and use the flex tube how does the process get done when I only have 2 hands? It takes 2 hands to pump right? Now I have to hold the flex hose against the zerk hard...
I am just confused, I am missing the boat here on something silly. Like I think I said, I am a newb to tractors...
I appreciate the input..
No..... You put the coupler on the alemite fitting and the jaws in the coupler are spring loaded so it stays on. When you apply pressure (grease), the coupler jaws actually grip the head of the zerk (alemite) fitting in relation to how much pressure is generated by the grease gun mechanism.
If you have to physically hold the coupler on the fitting, something is wrong with the coupler or the fitting, or both. That's why fittings are mushroom shaped (look at the end of the fitting). It's so the coupler jaws can grasp it and lock on.
I grease a lot and I wear out couplers a lot. When they won't grip any more, I toss 'em and get another. All couplers and grease hose and rigid grease pipes are NPT so interchange is easy. I go through fittings too. I keep an assortment of alemite fittings on hand too. I typically run through 90 pounds of grease per year, sometimes more, depending on machine use. Changing tubes on a cartridge gun would be a PITA so bulk loading from a remote source is more expeditious for me and if I need to, I can reach 75 feet with my bulk greaser hose.
Bulk greasers aren't for everyone because of the cost. The pumps are expensive, the grease hose is expensive, however, buying grease in bulk (50-75 or 150 pound open head pails or drums is considerably cheaper than buying individual tubes, especially if you use a synthetic grease (like I do) instead of the box store clay based, lithium compond grease.
I don't like or use any clay based grease because one, it tends to harden inside assemblies during use, two, it's unsuitable for sustained high speed loads like revolving bearings and three, it's black and messy. The synthetic I use is wide application, won't harden in service, is basically waterproof and it's red-orange and not messy.
The drawback is it ain't cheap, but like all things in life, you get what you pay for.
There are straight fittings for special use that won't lock a coupler on, however, you won't find them on tractors or implements. They are designed for low pressure greasing in confined spaces.