25. Procedures for Maintenance
3-25
25-2-2. Checking and adjusting the rubber crawler tension
How a rubber crawler wears out depends on the working
conditions and the nature of the ground. Be sure to check
the rubber crawlers for wear and tension from time to time.
When a new rubber crawler is mounted, perform the first
check after 30 hours operation.
Checking the rubber crawler tension
1) Move the machine so that the joint (
mark) on the in-
side surface of the rubber crawler is positioned at the
upper center of the track frame.
2) Lift the machine with the implement and the safety
blocks.
To do this, operate the control lever slowly.
3) The tension is proper if the clearance (H in the figure at
the right) between the outside rolling surface of the sec-
ond track roller from the idler side and the inside surface
of the rubber crawler is within the following range :
• H=0.31 to 0.51 in. (8 to 13 mm)
Working with the rubber crawler too loose will cause the
rubber crawler to come off or the core metal to wear out
earlier.
• When adjusting the rubber crawler tension while
raising the machine, do not support the machine
with the implement only.
The control levers could move or the hydraulic
oil could flow out accidentally so that the ma-
chine would fall.
• When raising the machine, support it with safety
blocks of sufficient strength.
When the machine is being checked or adjusted
by two persons, one must operate the machine in
response to signs from the other.
Idler
A
A : ’
’ mark inside rubber crawler
020172-00X
Track roller
Rubber crawler
H
H=0.31 to 0.51 in.
(8 to 13 mm)
Summary of Contents for Z17 GEN:2
Page 28: ...MEMO 1 16 Courtesy of Machine Market...
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Page 41: ...2 1 OPERATION Courtesy of Machine Market...
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Page 129: ...3 1 MAINTENANCE Courtesy of Machine Market...
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Page 189: ...4 1 SPECIFICATIONS AND DIMENSIONAL DIAGRAMS Courtesy of Machine Market...
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Page 193: ...5 1 OPTIONAL PARTS AND ATTACHMENTS Courtesy of Machine Market...
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Page 197: ...6 1 NOTES Courtesy of Machine Market...
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Page 200: ...28 Maintenance Log 6 4 Date Machine hours Service performed Courtesy of Machine Market...
Page 201: ...28 Maintenance Log 6 5 Date Machine hours Service performed Courtesy of Machine Market...
Page 202: ...6 6 29 Notes Notes Courtesy of Machine Market...
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