Track Sag General Information; Check Track Shoe Hardware; Hardware Torque Specifications - Worldwide Construction And Forestry Division 380GLC Operator's Manual

Track Sag General Information

To maximize undercarriage life, keep track sag within
specification. Tracks may require adjustment several
times during a working day 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

Check Track Shoe Hardware

Tracks shoes should be checked periodically for loose
or missing cap screws and nuts. For shoes with missing
or loose cap screws and nuts, remove shoes and clean
the mating surface of shoes and links before tightening
cap screws and nuts. The cap screws should be replaced
because they have been stretched to yield previously.
Operating a machine with loose shoes can cause the cap
screws and holes in the shoes and links to wear making
it difficult to keep the shoes tight. Loose shoes can also
cause hardware failure and loss of shoes.
1. Clean the mating surface of shoe and links. Install
shoes.
2. Apply a light coating of oil to cap screw threads before
installing.
3. Install nuts with the rounded corners against milled
surface of link and chamfered side is away from link.

Hardware Torque Specifications

Check cap screws and nuts to be sure they are tight.
If hardware is loose, tighten to torque shown on the
following charts unless a special torque is specified.
Miscellaneous—Machine
popping, tooth tip wear, and excessive loads on the entire
undercarriage and travel 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.
Check that nuts are square with the milled surface of
link and there is full contact between nut and milled
surface. As necessary, hold the nut so it does not turn.
4. Starting at any cap screw, tighten all cap screws in
sequence shown to specification.
4-1-18
Cap Screw Tightening Sequence
TX14740,0001CFC -19-05JAN16-1/1
TX,90,FF1225 -19-15MAR93-1/1
04T,90,M197 -19-11MAY06-1/1
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