A seal assembly for sealing a lubricant space that is formed between a pin, a track shoe pressed-on onto one end of the pin, and a sleeve of a track. The sleeve is pushed onto the pin and is swivelable on the pin. The track further includes at least one second track shoe pressed onto one end of the sleeve. The seal assembly provides a first seal ring for sealing the lubricant space between the sleeve and the first track shoe, and an elastic ring for applying pressure to the first seal ring. The seal assembly further provides a second seal ring for sealing the lubricant space between the sleeve and the first track shoe and/or the pin.

A rotating assembly for a machine is disclosed herein. The rotating assembly includes an annular support structure and a shaft assembly. The annular support structure includes a bore therethrough and protrusion extending helically around a portion of the bore. The shaft assembly includes a shaft and a collar coupled to the shaft. The collar includes a plurality of grooves located at the outer surface of the collar. The collar is positioned within the bore of the annular support structure such that the plurality of grooves are adjacent to the protrusion. As the annular support structure rotates, the protrusion rotates and is configured to move debris and mud out of the rotating assembly.

A face seal for use within a wheel assembly may include an inner sealing ring and an outer sealing ring. The outer sealing ring may include a first flange, a second flange and an outer cylindrical portion extending between the first and second flanges. The outer cylindrical portion may include a first cylindrical section extending axially from the first flange and a second cylindrical section extending axially between the first cylindrical section and the second flange. The face seal may also include an inner elastomeric ring and an outer elastomeric ring having an axial portion extending radially outwardly from the second cylindrical section of the outer cylindrical portion. Additionally, the axial portion may be radially offset from the first cylindrical section of the outer cylindrical portion such that an outer surface of the first cylindrical section is spaced radially outwardly relative to an outer surface of the axial portion.

A face seal for use within a wheel assembly may include an inner sealing ring and an outer sealing ring. The outer sealing ring may include a first flange, a second flange and an outer cylindrical portion extending between the first and second flanges. The outer cylindrical portion may include a first cylindrical section extending axially from the first flange and a second cylindrical section extending axially between the first cylindrical section and the second flange. The face seal may also include an inner elastomeric ring and an outer elastomeric ring having an axial portion extending radially outwardly from the second cylindrical section of the outer cylindrical portion. Additionally, the axial portion may be radially offset from the first cylindrical section of the outer cylindrical portion such that an outer surface of the first cylindrical section is spaced radially outwardly relative to an outer surface of the axial portion.

PROBLEM: To provide a cover body (18) at a space X formed between a motor housing (14) and a sprocket (15) which are the components of a drive sprocket (10) of a base carrier (2) in a hydraulic shovel, so as to prevent foreign substances such as sand from entering into the space, and to be installed to the motor housing side (14) without forming a bolt hole. SOLUTION: A cover body (18) is formed to be a split-body divided to an upper half (19) and a lower half (20), and to be connected to each other to form a ring shape by connecting a connect bolt (23) formed at an adjacent part of the cover body (18). The cover body (18) is installed to the space X by inserting an adjust bolt (21) into a ring shaped main body part (19a and 20a) till abut the motor housing (14) tightly. An outlet (26) is formed as a notch on a cover body (19d and 20d) to discharge the foreign substances entering into the space X between the sprocket housing (15) and a tip end of the cover part.

PROBLEM: To provide a cover body (18) at a space X formed between a motor housing (14) and a sprocket (15) which are the components of a drive sprocket (10) of a base carrier (2) in a hydraulic shovel, so as to prevent foreign substances such as sand from entering into the space, and to be installed to the motor housing side (14) without forming a bolt hole. SOLUTION: A cover body (18) is formed to be a split-body divided to an upper half (19) and a lower half (20), and to be connected to each other to form a ring shape by connecting a connect bolt (23) formed at an adjacent part of the cover body (18). The cover body (18) is installed to the space X by inserting an adjust bolt (21) into a ring shaped main body part (19a and 20a) till abut the motor housing (14) tightly. An outlet (26) is formed as a notch on a cover body (19d and 20d) to discharge the foreign substances entering into the space X between the sprocket housing (15) and a tip end of the cover part.

A roller assembly is disclosed. The roller assembly may have a roller shell. The roller shell may have a bore. The roller assembly may also have a substantially cylindrical shaft. The shaft may extend from a shaft proximate end to a shaft distal end. The shaft may be disposed within the bore. The roller assembly may also have a first collar disposed between the shaft proximate end and the roller shell. The first collar may be interferingly engaged with the shaft. The roller assembly may further have a second collar disposed between the shaft distal end and the roller shell. The second collar may also be interferingly engaged with the shaft.

A roller assembly is disclosed. The roller assembly may have a roller shell. The roller shell may have a bore. The roller assembly may also have a substantially cylindrical shaft. The shaft may extend from a shaft proximate end to a shaft distal end. The shaft may be disposed within the bore. The roller assembly may also have a first collar disposed between the shaft proximate end and the roller shell. The first collar may be interferingly engaged with the shaft. The roller assembly may further have a second collar disposed between the shaft distal end and the roller shell. The second collar may also be interferingly engaged with the shaft.

A track roller includes a roller shell, a first retainer, a second retainer, a first holding ring, and a second holding ring. The first retainer is press-fitted to the outer periphery of a shaft and abuts on a first end face of the roller shell. The second retainer is press-fitted to the outer periphery of the shaft and abuts on a second end face of the roller shell. The first holding ring is attached to the outer periphery of the shaft on the outside of the first retainer and fixes the first retainer. The second holding ring is attached to the outer periphery of the shaft and fixes the second retainer.

A crawler with a wear limit indicator comprises a crawler main body, sprocket holes formed to pass through a central portion of the crawler main body at equal intervals, core metals configured to be inserted and installed in-between the sprocket holes, left lugs configured to protrude from one surface of the crawler main body and simultaneously overlap with the sprocket holes and one of the core metals, right lugs configured to protrude from the other surface of the crawler main body and simultaneously overlap a pair of adjacent core metals, and a wear limit indicator configured to protrude from front and rear surfaces of the left lugs and the right lugs and inform that a replacement time for a crawler has come when worn-out surfaces of the left lugs and the right lugs are placed on the same horizontal plane as the wear limit indicator.