Kubota U17-3a, Руководство по эксплуатации

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Maintenance
100
Checking and adjusting the crawler tension
If the crawlers are too tight, wear is increased.
If the crawlers are too loose, wear is increased and the crawlers may come off.
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 100).

Clean all parts of the running gear, paying particular atten-
tion to stones between the crawler and sprocket or idler.
Clean in the area of the crawler tensioning cylinder.

Swivel the swivel frame 90° to the direction of travel as
shown in the figure.

Lower the front attachments on the ground and raise the
excavator about 200 mm off the ground on one side.
Have a guide supervise the procedure.
Support the excavator with appropriate supporting material, observing the vehicle weight.
Checking the crawler tension

The crawler seam (1) is half way between idler and idler
sprocket.

Check the crawler sag as shown in the figure.
Crawler sag A 10-15 mm

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.