Birchmeier 10865201 Grease Piston Cap
This part sits on top of the grease reservoir.
By giving the cap a partial turn to the right, grease is applied to the piston to keep the backpack lubricated.
Birchmeier Grease | Preventative Maintenance | QSpray 00:56
Keep your Birchmeier backpack running like a "well oiled machine" with our Birchmeier grease: http://bit.ly/2ssV1do Visit QSpray today for all your sprayer maintenance needs, and contact us with any questions: https://www.qspray.com/contact-us/