Checking The Crawler Tension - Kubota K008-3 Operating Instructions Manual

When parking an excavator with rubber crawlers, ensure that the
seam (∞ ) is on top half way between the two sliders. See figure
in the "Checking the crawler tension" section (page 96).

Clean all parts of the running gear, paying particular atten-
tion to stones between the crawler and sprocket or idler.
Clean the area of the crawler tensioning cylinder.

Swivel the swivel frame 180° to the direction of travel as
shown in the figure.

Lower the dozer blade to the ground and raise the excava-
tor until the dozer blade touches the ground.

Lower the front attachments onto the ground and raise the
excavator about 200 mm off the ground.
Have a guide supervise the procedure.
Support the excavator with appropriate backing material, observing the vehicle weight.

Checking the crawler tension


The crawler seam (1) is half way between the idler and
sprocket.

Check the crawler sag as shown in the figure.
Crawler sag "A"

If the crawler sag is more than 15 mm, adjust the crawler.

If necessary, tighten or loosen the crawler.

Start the engine and rotate the lifted crawler briefly.
Caution: The area around the rotating crawler must be free of persons. Turn the starter switch to
the STOP position after turning and remove the key.

Recheck the crawler tension, readjusting it if necessary.

Perform the procedures on the second crawler.
96
10-15 mm
Maintenance