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15.11 Check and adjustment of track tension
Check and adjust track tension with the outriggers deployed and tracks lifted off
the ground. First track tension check and eventual adjustment shall be made after
first hour of operation. After that track tension shall be checked, and adjusted if
needed, once a week. Check also tightness of the bolts and nuts of the sprockets.
See to it that track tension is always correct. It has a direct effect on the wear of
the tracks and eventual derailing of the tracks.
1. Lift the tracks off the ground by deploying the outriggers.
2. Move the tracks a bit forward and backward by moving the drive control levers.
Check track tension as follows:
Way 1: Measure the slack between the track rollers and inside of the track,
no. 1 in the picture above. The slack should be 10-30 mm. If it is more than
30 mm, tighten the track.
Way 2: Check if the front end plate no. 4 of the track tightening system can
move freely. The end plate is located at the front of the track system, behind
the front idler. If the plate moves easily, track tension is correct. If the plate is
stuck, tighten the track.
Adjust track tension
Start adjusting by opening locking nut no. 2. After that tighten the tracks with
the tightening nut no. 3 until the slack between the roller and inside of the track
is about 10 mm, or until the end plate no. 4 moves freely. Finally retighten
locking nut no. 2. The width across flats of the tightening and locking nuts is 36
mm (torque 350-400 N/m). The nut at the end plate shall not be tightened when
adjusting track tension.
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