One New Aftermarket Replacement Track Adjuster Assembly Fits Caterpillar (Fits CAT) Excavators
This aftermarket replacement track adjuster assembly Fits Caterpillar compact and mid-size excavators in the 300-series and E-series lines. The track adjuster is a hydraulic undercarriage component that maintains correct track tension, preventing premature wear on track chains, sprockets, and rollers. The assembly includes a piston, tube, fittings, and seal kit — a complete, ready-to-install replacement for the original Fits Caterpillar unit.
Specifications
- Overall Length: 12 in.
- Rod Diameter: 2 in.
- Assembly includes: piston, tube, fittings, and seal kit
Compatible Models
Fits Caterpillar E-Series Excavators: E110B, E120B, EL110B, EL120B
Fits Caterpillar 300-Series Excavators: 311, 311B, 312, 312B, 312B L, 313B
Replaces Part Number(s):
4I7338, 4I-7338, UNU20-0003
New aftermarket replacement part – not remanufactured, not used.

