Track Sag General Information
To maximize undercarriage life, keep track sag within specification. Tracks may require adjustment due to changing soil type and moisture content.
Adjust tracks in the actual operating conditions.
TIGHT TRACK: Packing causes a tight track. If material packs in the undercarriage, adjust tracks with the material packed in the components.
While the track spring will recoil and the machine can continue to operate with a tight track, continued operation will result in excessive pin and bushing wear, sprocket popping, tooth tip wear, and excessive loads on the entire undercarriage and propel drive system.
Machine productivity and fuel consumption are also adversely affected because increased horsepower is needed to move the machine.
LOOSE TRACK: A loose track has more side to side motion, increasing side wear on the links, rollers and front idler. An excessively loose track will slap at high ground speeds, resulting in high impact loads on the sprocket teeth, bushings, and carrier rollers.
NOTE:
Track guides assist the track rollers in guiding the track chain in sidehill applications. This guiding contact causes track guide wear.
This type of wear does not affect the normal operation of an undercarriage and may require repair or part replacement only if excessive.
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