SEN02018-00
50 Disassembly and assembly
Undercarriage and frame, Part 2 Expansion and installation of track shoe assembly
1
Expansion of track shoe assembly (Normal) 1
Expansion
a
If Checking before expansion of track shoe assembly shows that there is no abnormality, do as follows.
1.
Set master link in position. a Bring the master link above the idler (just behind the center). a Set blocks [1] and [2] at the front end of the idler and between the carrier rollers so that the mating faces of the master link will not open until the master bolt is removed.
2.
Relieve track shoe tension. [*1] k Never loosen lubricator (1) more than one turn. a If the track is not relieved by loosening the lubricator, move the machine backwards and forwards.
Checking before expansion of track shoe assembly
k In some cases, it may be extremely danger-
ous to expand the track shoe assembly. To prevent danger, carry out the following checks before expansion of the track shoe assembly. k Never loosen the lubricator more than one turn. q Loosen lubricator (1) at the adjustment cylinder, release the grease, then move the machine backwards and forwards a short distance, and check that the track tension is relieved. a If the shoe tension is relieved, go to "Expansion of track shoe assembly (Normal)".
q
a
2
If the above procedure does not relieve the track tension and the track shoe assembly remains tense, there may be an abnormality inside the track frame (the recoil spring case is broken, the recoil spring set bolt is broken, or the nut at the end of shaft has fallen off). If the shoe tension is not relieved, go to "Expansion of track shoe assembly (when there is abnormality inside track frame)".
D475A, D475ASD-5E0
