Double Flange Excavator Track Roller 9072631 for Hitachi EX400

Compatibility Information

Designed for:

• Hitachi EX400 Excavator Series (EX400-1, EX400-2, EX400-3, EX400-5, EX400-7, EX400LC models)

Verify with your machine's serial number or service manual. Cross-references may include similar OEM numbers; Kasu Parts support can assist for exact matching.

Why do the same excavator models use both single flange and double flange track rollers?

Many excavator models (such as Hitachi EX400, Komatsu PC300, Caterpillar, etc.) are designed with both single flange and double flange track rollers in their undercarriage because each type is optimized for different positions along the track frame.

Main Differences

Single Flange Track Roller

Usually installed in the middle positions.

It has only one flange (on the inner side), which is enough to guide the track and prevent it from sliding outward.

Double Flange Track Roller

Usually installed near the front (closer to the idler) and rear (closer to the sprocket).

It has two flanges (one on each side), providing stronger lateral control to keep the track from shifting sideways, especially during turns, slopes, or side loads.

Similarities

Both are made from similar high-strength forged steel with the same heat treatment, bearings, and sealing systems.

Outer diameter, shaft size, and basic load capacity are usually very close.

Can single flange track roller and double flange track roller be swapped with each other?

In most cases, NO — they are not interchangeable.

Reasons:

The mounting positions on the track frame have different widths and clearance designs.

Using a double flange in a single flange position may cause interference or jamming.

Using a single flange in a double flange position may allow too much side-to-side movement, leading to track misalignment, faster wear, or even derailment.

Original equipment manufacturers (OEMs) assign different part numbers for each position to ensure proper track guidance and safety.

Key Features and Benefits of EX400 Double Flanges Excavator Track Roller

Kasu Parts' Double Flange Track Roller addresses key pain points such as premature wear, track misalignment, and supply delays:

• Premium Forged Alloy Steel Construction: High-tensile material ensures exceptional strength and wear resistance, extending lifespan by resisting impacts and abrasion in harsh conditions.
• Advanced Heat Treatment and Hardening: Induction-hardened surfaces achieve HRC50-58 hardness (10-12mm depth), preventing cracking and deformation under heavy loads for reliable uptime.
• Double Flange Design for Superior Guidance: Provides extra lateral support to keep tracks aligned, reducing derailment risks and improving stability on slopes or uneven terrain.
• Rigorous Quality Control: Every roller undergoes dimensional checks, hardness testing, and load simulations to meet or exceed OEM standards, ensuring zero defects.
• Ample Inventory and Fast Global Shipping: Ready stock in Kasu Parts warehouses allows same-day dispatch, solving long lead times for urgent replacements.

Excavator Track Roller Maintenance Tips

• Maintain proper track tension (check manufacturer specs).
• Inspect for wear, rotation, and seal integrity every 250 hours.
• Avoid over-tightening to prevent premature flange wear.
• Use in matched sets for even undercarriage wear.

Related Products from Kasu Parts

• Kasu Parts Hitachi EX400 Carrier Roller
• Kasu Parts EX400 Track Chain Assembly
• Kasu Parts Hitachi EX400 Idler

KASU provide track rollers for various models of excavator