Undercarriage Spare Parts --- Track Roller/Idler/Sprocket/Carrier Roller...

I. Components

Core Parts:

Track Rollers (Support Rollers)

Idlers (Guide Wheels)

Sprockets (Drive Wheels)

Carrier Rollers (Upper Rollers)

Track Assembly (Track Chains, Links, Track Shoes)

Track Tensioning System (Tension Cylinder, Tension Spring)

Auxiliary Parts:

Track Links, Track Pads, Track Frames, Hitch Frames, Pins/Bushings

Swing Rings, Track Shoe Bolts/Nuts, Track Guards, Travel Motor Covers

Specialized Designs:

Lubricated Track Adjusters

Triple-Reinforced Shoes (e.g., 600mm/800mm width)

Tow Hooks, Track Covers (e.g., for ZX-7H 345USLC models)

II. Key Features

Critical Importance:

Undercarriage accounts for 25% of excavator manufacturing costs.

Directly impacts machine stability, mobility, and maintenance costs (often >50% of lifetime expenses).

Durability & Adaptability:

Reinforced track chains with sealed pins.

Wear-resistant rubber tracks and quarry-grade rollers for rocky/abrasive terrains.

Custom designs: Amphibious (swamp/marsh), remote-controlled (orchard use), or mountain/mud tracks.

Serviceability:

Detachable sprocket segments.

Direction-marked track frames for easy reassembly.

III. Common Models

Machine Compatibility:

Komatsu: PC60, PC100-5/6, PC130-7, PC160-7, PC300-7, PC400/420/450

Hitachi/Hyundai:EX55/60,ZX55/70/110/120/130/750/800;

Hyundai:R60/R80/R130/R210/R300/R330LC/R455

Other Brands: SANY SY55/SK210/SK250-8, XCMG XE215, Liugong 920E, Zoomlion ZE120/130/150

Caterpillar: CAT E307/E390 (compatible with 374/390 chain links)

Component-Specific Models:

Track Rollers: ZAX110/ZAX120 rollers, SANY 55 rollers, SD16/SD22 rollers.

Tension Systems: Komatsu PC400-7 tension cylinder assembly.