210
W9272-8135-1
05/2020
Maintenance
Crawler tension - check/adjust
When parking an machine with rubber crawlers, ensure that the
seam ( ) is on top half way between the two sliders (see figure/1,
"Crawler tension - check", page 210).
Clean all parts of the running gear, paying particular attention
to stones between the crawler and sprocket or idler. Clean 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 ma-
chine about 200 mm off the ground on one side.
Crawler tension - check
The crawler seam (3) is on the top halfway between the idler (1)
and sprocket (2).
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.
If the crawlers are too tight, wear is increased.
If the crawlers are too loose, wear is increased and the crawlers may come off.
Have a guide supervise the procedure.
Do not work under the machine, when lifting the machine itself with the attachment.
Support the machine with a safety block or safety post and keep the lock lever for attachment control
in the “LOCK” position.
Crawlers with an SP mark can be checked and ten-
sioned in any position.
STOP
STOP
STOP
Summary of Contents for U50-5
Page 1: ...GB COMPACT EXCAVATOR MODEL U50 5 OPERATING INSTRUCTIONS W9272 8135 1 Original 05 2020...
Page 38: ...36 W9272 8135 1 05 2020 Safety rules...
Page 54: ...52 W9272 8135 1 05 2020 Description of the machine...
Page 74: ...72 W9272 8135 1 05 2020 Assembly and functions...
Page 164: ...162 W9272 8135 1 05 2020 Operation...
Page 222: ...220 W9272 8135 1 05 2020 Maintenance...
Page 224: ...222 W9272 8135 1 05 2020 Safety inspection...
Page 234: ...232 W9272 8135 1 05 2020 Software information...
Page 235: ...Software information W9272 8135 1 233 05 2020...
Page 236: ......