Excavator Track Adjustment
Grease is under high pressure.
Grease coming out of the relief valve
under pressure can penetrate the body
causing injury or death.
Do not watch the relief valve to see if
grease is escaping. Watch the track or
track adjustment cylinder to see if the
track is being loosened.
1 Operate the machine in the direction of
the idlers.
2 Stop with one track pin directly over the
front carrier roller. Park the machine and
turn off the engine.
3 Place a tight line or straight edge on top
of the grousers between the front
carrier roller and idler.
Measure the distance from the straight
edge to the grouser tip at the lowest
point of sag, midway between the front
carrier roller and idler.
Refer to the chart at right to determine
the correct sag for each model.
4 If the track is too tight, loosen it by
opening the relief valve and allowing
grease to escape.
5 Tighten track by adding grease at the
hydraulic fill and relief valve. Travel in
forward and reverse to equalize tension
throughout the track. Then reinspect
adjustment.
497
COMPONENTS
Excavators
Proper Track Sag
MODEL Minimum Target Maximum
All 300 Family series excavators 1.6" (40 mm) 1.85" (47.5 mm) 2.1" (55 mm)
All 200 Family series excavators 1.0" (25 mm) 1.3" (32.5 mm) 1.5" (40 mm)
All E Family series excavators 1.6" (40 mm) 1.85" (47.5 mm) 2.1" (55 mm)
5080, 5090B 1.6" (40 mm) 1.85" (47.5 mm) 2.1" (55 mm)