JLG 600SC Operator's And Safety Manual page 29

Measuring Track Tension
1. Place a straight edge on the tracks. The straight
edge should be long enough to reach from the idler
to the carrier roller.
2. Measure the maximum amount of sag in the track.
The sag is measured from the highest point of the
track grouser to the bottom of the edge. A track that
is properly adjusted will have a slack of 40 to 55 mm
(1 5/8 to 2 1/8 inch).
Tightening the Track
Wipe the fitting before you add grease.
1. Add grease through valve fitting (1) until the correct
track tension is reached.
2. Operate the machine back and forth in order to
equalize the pressure.
3. Check the amount of sag. Adjust the track, as
needed.
3120897
SECTION 2 - PREPARATION AND INSPECTION
Loosening the Track
1. Loosen relief valve (2) Carefully until the track begins
to loosen. One turn should be the maximum.
2. Tighten relief valve (2) to 34 N m (25 lb ft) when the
desired track tension is reached.
3. Operate the machine back and forth in order to
equalize the pressure.
4. Check the amount of sag. Adjust the track, as
needed.
If the correct adjustment cannot be achieved, Consult
your JLG dealer.
– JLG Lift – 2-15