Track roller assembly having adjustable idler wheel

A track roller assembly, comprising:

• a yoke member having a first arm and a second arm spaced apart from the first arm;
• an idler wheel rotatably disposed between the first and second arms of the yoke member;
• a frame configured to receive at least a portion of the yoke member;
• and
• at least one idler key configured to extend through an opening in the frame and engage the yoke member, wherein:
• when the at least one idler key is mounted to the frame in a first orientation, the yoke member is retained in a first position relative to the frame;
• and
• when the at least one idler key is mounted to the frame in a second orientation, the yoke member is retained in a second position relative to the frame.

A track type machine, comprising:

• a machine frame;
• an engine supported by the machine frame;
• a sprocket driven by the engine;
• a track roller frame pivotally connected at one end to the machine frame;
• a plurality of lower rollers connected to a lower side of the track roller frame;
• a plurality of upper carriers connected to an upper side of the track roller frame;
• a yoke member having a first end disposed at least partially within the track roller frame, and first and second spaced apart arms protruding from a second end;
• an idler wheel rotatably disposed between the first and second arms of the yoke member;
• an endless track wrapped around the sprocket, the plurality of lower rollers, the plurality of upper carriers, and the idler wheel;
• and
• first and second idler keys configured to extend through openings in opposing sides of the track roller frame to engage lengthwise slots in at the first and second arms,
• wherein:
• when the first and second idler keys are mounted to the track roller frame in a first orientation, the yoke member is retained in a first position relative to the lower rollers;
• and
• when the first and second idler keys are mounted to the track roller frame in a second orientation, the yoke member is retained in a second position further away from the lower rollers.