CAT 3J-5397 ROLLER

CAT 3J-5397 is a Caterpillar Carrier Roller assembly, adapted for upper track support and guidance in tracked construction machinery. It is used in the chassis running system of bulldozers, loaders, and excavators to ensure track tension and smooth operation. It features high strength, impact resistance, and leak-proof sealing characteristics. The following is the core information:

Core Technical Parameters
Item Details
Part Model: CAT 3J-5397 (3J5397) Track Roller Assembly, including roller body, shaft, bearing, seals, and end caps. Suitable for small and medium-sized tracked equipment with a track pitch of 120mm.

Material: Roller body: 40Cr alloy steel forging, quenched HRC52-58; Shaft: 42CrMo tempered HRC30-35; Bearing: 52100 bearing steel tapered roller bearing; Seal: Nitrile rubber (NBR) double lip + dust ring, protection level IP65; End cap: Q235 steel galvanized anti-corrosion.

Key Dimensions: Roller outer diameter 100mm, tread diameter 85mm, width 45mm, shaft diameter 35mm, mounting hole spacing 120mm, total length 180mm, single weight approximately 4.2kg

Compatible Models: CAT D3C/D4C Suitable for small and medium-sized tracked equipment such as bulldozers, 307C excavators, and 906H loaders, with track width ≤600mm and machine weight ≤12 tons.

Performance Parameters: Radial rated load 65kN, operating speed ≤500rpm, operating temperature -40℃ to 100℃, leak-proof sealing design, lifetime maintenance-free (pre-filled with lithium-based grease).

Core Functions and Structural Features:

Track Support and Guiding: Single/double flange structure, restricts lateral track deviation, prevents derailment, adapts to complex terrain, ensures stable track tension, and reduces track wear.

Impact Resistance and Durability: Alloy steel forged rollers + tempered shafts, suitable for heavy-load and impact conditions, tread surface hardening treatment, increases wear life by 50%, suitable for harsh environments such as mining and infrastructure.

Leak-proof Sealing: Double-lip seal + labyrinth dustproof structure, prevents mud, sand, and moisture intrusion, pre-filled with long-life grease, lifetime maintenance-free, reducing operating costs.

Easy Installation: The integrated assembly design allows for direct bolt fixation to the track frame. After installation, the coaxiality error is ≤0.1mm, enabling quick chassis maintenance and replacement.

Installation and Maintenance Points
Installation Specifications:
Clean the track frame mounting surface and check that the rollers are free from deformation and have intact seals. Tighten with M12 bolts to a torque of 80-90 N·m. After installation, the rollers should rotate freely without jamming.

After installation, check track tension: Track sag (middle) 20-30mm. Adjust the tension cylinder to the standard range to avoid excessively tight/loose tracks that cause abnormal wear.

Maintenance Recommendations:
Check every 500 working hours:
Roller temperature ≤75℃, no leakage, no abnormal noise, and no track misalignment. If loose rollers/leakage/abnormal noise are found, replace the assembly immediately.

Avoid prolonged overload/uneven load conditions to prevent roller tread deformation and bearing damage, extending service life.