Florida Pneumatic FP-970 Continuous Flow Grease Gun Review

I received this item and hoped it was a bargain.After an afternoon, and, 4 wasted grease cartridges, it was obvious that it is a throwaway.

The air piston and housing are of moderate to good quality.It is of cast aluminum and sufficiently sturdy to accomodate up to 4,000 psi of grease pressure.However, the cartridge tube, and, plunger system, are so poorly designed, and, poorly manufactured, that you would be able to get one of these to work with a cartridge only as a matter of luck.

The plunger gasket is designed to fit tightly into the overtube so that it will cleanly force grease to the air piston through the tube.The problem is that the gasket is so tight, that if you use a cartridge, the very cheap spring mechanism does not have sufficient strength to force the gasket into the cartridge.

It might be possible to bulk fill this from a 55 gal drum, but, I was unable to get it to work with standard cartridges.

In addition, there is no way to lock the plunger rod at the bottom, consequently, there is no way to engage the spring to compress the grease in the cartridge.

Finally, the design is from a hand pumped cartridge grease gun . . . All they did was stick an air piston on top of it instead of using a hand lever.The result is that if you are trying to inject the grease into a stubborn fitting, the immense air pressure (about 4,000 psi) instead of forcing the grease into the fitting, simply builds up behind the air piston and forces a huge bubble of air into the grease tube and cartridge.

The only way to solve this is to keep pulling back the injector lever and releasing the air from the cartridge tube, then, starting all over.In other words, everytime the air piston builds up air in the cartridge tube, you have to release the air, then, release the spring so that the grease is fed forward to the air piston without a high pressure pocket of air between the grease and the piston.

I was able to temporarily fix the rodproblem with some ingenuity, only to discover that the plunger gasket is WAY oversized, and, will hang up on the lip of cartridge.The result is that there is no way to deliver the grease to the air piston from a cartridge without readjusting the ram about every few seconds of greasing.

This is a forty dollar piece of junk that was improperly manufactured, improperly designed, and, then dumped on the U.S. market.

It is made in Taiwan.

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