CATERPILLAR crawler excavator part E325 (6Y1057,1634147,6Y3021)track roller

Product Specifications

CATERPILLAR crawler excavator part E325 (6Y1057,1634147,6Y3021)track roller

Cat 325 Track Roller Specifications

• Type: Bottom rollers (load-bearing) and top rollers (track return)

• Quantity: Typically 7–9 bottom rollers per side (varies by model year)

• Material: Hardened steel with sealed & lubricated bearings

• Lubrication: Grease-filled (common) or oil-bath (some newer models)

Common OEM Part Numbers

(Always verify with your machine’s serial number on the Cat Parts Catalog)

Bottom Rollers (Main Load Rollers)

• Older Models (325 L, 325 LN):

  • 4I-3615 (Standard)

  • 153-7353 (Updated design)

• Newer Models (325 D, 325 F):

  • 259-8435 (Used in multiple Cat models)

  • 439-1816 (Heavy-duty version)

Top Rollers (Track Return Rollers)

• 6Y-3201 (Common for 325B/C)

• 153-7354 (Used in later models)

Aftermarket Alternatives

If OEM parts are too expensive, high-quality aftermarket options include:

• Berco (Premium aftermarket)

• ITR (Durable, cost-effective)

• Lemac (Australian-made, reliable)

• VSE (Value-priced option)

Signs of Worn Track Rollers

• Track misalignment or excessive sag

• Grinding noises from the undercarriage

• Grease leaks (damaged seals)

• Flat spots or cracks on rollers

Replacement & Maintenance Tips

1. Check Serial Number – Verify exact fit using the Cat Parts Lookup.

2. Inspect Entire Undercarriage – Replace idlers, sprockets, or bushings if needed.

3. Torque Bolts Properly – Follow Cat’s specs to avoid track issues.

4. Consider Replacing in Pairs – Ensures even wear.