Kubota U48-4/U55-4 Excavator Rubber & Iron Track Assembly Disassembly Guide

This illustration show you guide on how to assembly and disassembly rubber and iron track for Kubota U48-4 and U55-4 excavator.

 

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Assembly / disassembly of rubber track

Removing the grease nipple

1.Remove one bolt (2) and then the cover (1).

2.Place a wrench (socket) at the base of the grease nipple and loosen slowly.

If there is a rock etc. caught in the sprocket, remove the rock first.

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Loosen track

1.Jack up the body using the front end and blade, expel grease from inside the grease cylinder, and fully loosen up the track.

When the track loosens up, attach the grease nipple.

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Removing the rubber tracks

1.Lift the body slightly and move the track in the forward direction A.

Slide the track in the sideways direction at the front idler to remove it.

Weight of rubber track : approximately 240 kg (529 lbs)

A : Forward direction B : Slide direction

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Assembling rubber tracks

1.Jack up the mini-excavator with the front-end and the blade and assemble the track starting at the sprocket.

CAUTION

  • Make sure to assemble the rubber track in the correct orientation.

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2.With the mini-excavator lifted slightly, hold the rubber track with your hand on the outside, slowly turn it in the forward direction,and set it on the stepped area of the front idler.

 

CAUTION

  • Watch carefully to prevent your hands and legs from getting caught.
  • Lower the mini-excavator, drive it backwards to make sure the tracks are on securely.

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Assembly / disassembly of iron tracks

Removing the grease nipple

1.Remove one bolt (2) and then the cover (1).

Kubota-U48-4U55-4-Excavator-Rubber-Iron-Track-Assembly-Disassembly-Guide-6

2.Place a wrench (socket) at the base of the grease nipple and loosen slowly.

If there is a rock etc. caught in the sprocket, remove the rock first.

(1) Cover

(2) Bolt (M10)

(3) Grease nipple

 

7

Loosen track

1.Jack up the body using the front end and blade, expel grease from inside the grease cylinder, and fully loosen up the track.

When the track loosens up, attach the grease nipple.

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Removing the locking pin

1.Turn the track until the master pin (1) is in front of the front idler.

2.Remove the locking pin (3) from the master pin.

(1) Master pin

(2) Master link

(3) Locking pin

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Removing the master pin

1.Place a jig on the master pin and tap it out with a hammer.

Use a jig as shown in the diagram to the left for removing the pin.

 

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Removing the shoe

1.Slowly move the travel lever to the backup position and back up the mini-excavator.

2.Jack up the mini excavator using the front end and blade and pull off the shoe.

DANGER

  • Do not place feet under the mini excavator.
  • Weight of iron track : approximately 285 kg (628 lbs)

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Mounting an iron track

1.Jack up the mini excavator using the front end and blade and place the track so that the end of the track meshes with the sprocket under the mini excavator.

Make sure the track is placed in the correct orientation.

(1) Master link

(a) Sprocket side

(b) Front idler side

 

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2.Raise the track using a crane and mesh it with the sprocket teeth.

(4) Sprocket

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3.Slowly move the travel lever to the forward travel position to mesh the track with the shoe (6).

When the track is sufficiently pulled on to where the track link joint is at the front idler, lower the mini-excavator, and place a block (7) under the shoe to support the shoe.

Match up both ends of the shoe, insert the master pin from the outside of the body, insert the locking pin and bend the tip.

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