Greetings,
First, mount the greaser to a sturdy bench that is comfortable to work from.
Next, determine what kind of lube is in the machine. 50/50 NRA lube is soft and works without heat. Other lubes may require heat so that they will flow through the greaser mechanism.
Do not force the operating handle. If it does not operate freely, something is not right.
Measure the groove diameter of your 9mm pistol and order a die 0.001' larger.
You might be able to locate genuine parts from Forum members.
Let us know when you are ready for the next lesson.
Cheers,
Dave