Drive sprocket which has lubricated pre-assembled cartridge assembly attached thereto

A track type work machine, comprising:

• a track shoe;
• a drive lug secured to said track shoe;
• and
• a drive sprocket having (i) hub, (ii) a support secured to said hub, and (iii) a cartridge assembly secured to said support, said drive sprocket being positioned relative to said drive lug such that said cartridge assembly is in contact with said drive lug,
• wherein said cartridge assembly includes (i) a bushing having a passageway defined therethrough, (ii) a pin having a longitudinal axis, said pin being located within said passageway so that a first end portion and a second end portion of said pin extend outwardly from said passageway of said bushing, (iii) a first collar having a first hole defined therein, said first collar being positioned relative to said pin so that said first end portion of said pin is disposed within said first hole, (iv) a second collar having a second hole defined therein, said second collar being positioned relative to said pin so that said second end portion of said pin is disposed within said second hole, (v) a first seal arrangement interposed said first collar and said bushing such that said first seal arrangement contacts said first collar and said bushing, and (vi) a second seal arrangement interposed said second collar and said bushing such that said second seal arrangement contacts said second collar and said bushing, and
• wherein (i) said first collar is fixed in relation to said pin so that said first collar is unable to rotate relative to said pin, (ii) said second collar is fixed in relation to said pin so that said second collar is unable to rotate relative to said pin, and (iii) said bushing is able to rotate relative to said pin around said longitudinal axis.

A method of servicing a drive sprocket having (i) a hub and (ii) a support secured to said hub, comprising:

• (a) securing a cartridge assembly to said support, said cartridge assembly having (i) a bushing having a passageway defined therethrough, (ii) a pin having a longitudinal axis, said pin being located within said passageway so that a first end portion and a second end portion of said pin extend outwardly from said passageway of said bushing, (iii) a first collar having a first hole defined therein, said first collar being positioned relative to said pin so that said first end portion of said pin is disposed within said first hole, (iv) a second collar having a second hole defined therein, said second collar being positioned relative to said pin so that said second end portion of said pin is disposed within said second hole, (v) a first seal arrangement interposed said first collar and said bushing such that said first seal arrangement contacts said first collar and said bushing, and (vi) a second seal arrangement interposed said second collar and said bushing such that said second seal arrangement contacts said second collar and said bushing, wherein (i) said first collar is fixed in relation to said pin so that said first collar is unable to rotate relative to said pin, (ii) said second collar is fixed in relation to said pin so that said second collar is unable to rotate relative to said pin, (iii) said bushing is able to rotate relative to said pin around said longitudinal axis, and (iv) said bushing, said pin, said first collar, said first seal arrangement, said second collar, and said second seal arrangement define a substantially sealed chamber between an interior surface of said bushing and an exterior surface of said pin.

A drive sprocket arrangement having (i) a hub and (ii) a support secured to said hub, said support having a first aperture and a second aperture defined therein, comprising:

• cartridge assembly configured to be press fit into said first aperture and said second aperture, said cartridge assembly having (i) a bushing having a passageway defined therethrough, (ii) a pin having a longitudinal axis, said pin being located within said passageway so that a first end portion and a second end portion of said pin extend outwardly from said passageway of said bushing, (iii) a first collar having a first hole defined therein, said first collar being positioned relative to said pin so that said first end portion of said pin is disposed within said first hole, (iv) a second collar having a second hole defined therein, said second collar being positioned relative to said pin so that said second end portion of said pin is disposed within said second hole, (v) a first seal arrangement interposed said first collar and said bushing such that said first seal arrangement contacts said first collar and said bushing, and (vi) a second seal arrangement interposed said second collar and said bushing such that said second seal arrangement contacts said second collar and said bushing, wherein (i) said first collar is fixed in relation to said pin so that said first collar is unable to rotate relative to said pin, (ii) said second collar is fixed in relation to said pin so that said second collar is unable to rotate relative to said pin, and (iii) said bushing is able to rotate relative to said pin around said longitudinal axis.