Chainsaw and lubrication system for chainsaw guide bar

A chainsaw, the chainsaw comprising:

• a guide bar extending from a housing, wherein the guide bar comprises a track extending around a perimeter of the guide bar configured to receive a chain;
• and
• a lubrication system comprising:
• a reservoir at which a lubricant is contained, wherein the reservoir is releasably attachable to a machine drive device,
• the machine drive device comprising a body at which a pump apparatus is positioned, wherein a neck extends from the body, the neck comprising an attachment surface,
• wherein the reservoir fluidly communicates with a transition body extending between the neck and the reservoir, and wherein a retaining ring is received at the transition body and the attachment surface of the neck to retain the transition body to the neck, wherein the retaining ring is configured as a spring compressible into a groove of the transition body and expandable into the attachment surface of the neck to lock the transition body to the neck, and wherein the attachment surface of the neck forms a groove into which the retaining ring is expandable, and
• wherein the machine drive device forms an inlet opening in fluid communication with the reservoir, and wherein the machine drive device forms an outlet opening at which a conduit is fluidly coupled to receive the lubricant, the conduit forming a conduit outlet through which the lubricant is provided to the guide bar.