5-23 OM 28Z3 US – Edition 2.0 * * 28Z3b530.fm
Maintenance
5.9 Tracks
• Track wear can vary according to work and ground conditions.
☞ We recommend checking track wear and tension once a day.
☞ Park the machine on firm and level ground to check and perform maintenance.
Checking track tension
Warning!
Crushing hazard. Do not work under the machine unless it has been raised
and supported properly.
• Raising the machine with the stabilizer and working attachments is not an
acceptable stable platform to elevate the machine for work underneath
the machine!
Check track tension as follows:
• The rubber track has a mark B as shown in Fig. 129
☞ Place the excavator so that mark B of the rubber track is between the drive pinion C
and the track tension roller D
☞ Park the machine on firm and level ground
☞ Raise the excavator with the boom and the stick
☞ Slowly and carefully actuate the control levers
☞ Stop the engine
☞ Remove the key and carry it with you
☞ Fold the control lever base up
☞ Support the raised machine with blocks and cribbing adequate to provide a stable posi-
tion while working on the track system.
• Standard play between the sliding block's shoulder and the contact area of the second
support roller of the drive pinion is 20 – 25 mm (0.79’’ - 0.98’’).
☞ Set the tension as follows if it is not in accordance with the rated value.
Fig. 129: Rubber track mark
B
B
D
C
Fig. 130: Raising the excavator
Fig. 131: Measuring distance
20 – 25 mm
Maintenance
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