CAT 077-4840 BEARING BLO

CAT 077-4840 is a Caterpillar genuine BLO bearing (pure original factory information, no additional description), a single-row deep groove ball bearing with a seal, suitable for CAT engineering machinery rotating parts, used to withstand radial loads and provide sealing protection, ensuring stable operation and dust and water resistance (Cat®)…

Core Parameters and Information

Item Details
Part Model: CAT 077-4840 (0774840) BLO Bearing (Sealed Ball Bearing)

Structure Type: Single row deep groove ball bearing, double-sided rubber seal (BLO), stamped steel cage, outer ring with retaining groove

Material: Inner/outer rings are high-carbon chromium bearing steel (GCr15), rolling elements are bearing steel, seals are nitrile rubber (NBR), cage is SPCC stamped steel

Key Dimensions: Inner diameter 60 mm, outer diameter 95 mm, width 23 mm, retaining groove diameter 91 mm, retaining ring groove width 2.5 mm, seal lip diameter adapts to shaft diameter 60 mm

Performance Parameters: Basic rated dynamic load 29.5 kN, basic rated static load 19.2 kN, limiting speed (grease lubrication) 6000 r/min, operating temperature -30℃ to 120℃

Sealing Performance: IP65 Dustproof and waterproof, lip-contact sealing ring, suitable for grease lubrication, preventing contaminant intrusion and grease leakage.

Compatibility Standards: Complies with CAT bearing technical specifications, dimensional accuracy GB/T 307.1 P0 grade, rotational accuracy GB/T 307.2 G grade.

Compatible Machine Models and Assemblies:

Compatible Parts: Various shafts, gears, sprockets, and other rotating parts, used for radial support and axial positioning (with retaining ring).

Compatible Equipment: CAT 326D2/336D2 excavators, 980M loaders, D7E bulldozers, etc., used for rotating parts such as gearbox output shafts, hydraulic pump input shafts, and travel mechanism wheel axles.

Installation: 1 piece depending on machine model and location. The outer ring is installed in the bearing housing hole, and the inner ring is interference-fitted with the shaft, using a retaining ring (e.g., CAT 077-4836). (Fixed bearing) Axial positioning is achieved.

Installation and maintenance points:
Clean the shaft and bearing housing bore. Check the bearing for rust, cracks, and jamming. Ensure the seals are intact, undamaged, and undeformed.

Use the cold-press method for installation. Apply even pressure to the inner ring end face using a dedicated bearing installation tool. Do not strike the outer ring or seals.

After installation, check that the bearing operates smoothly without jamming or abnormal noise. Axial runout ≤ 0.05 mm, radial runout ≤ 0.03 mm.

Maintenance: Check the bearing temperature (≤ 80℃) and lubrication condition every 2000 hours. Replace the bearing immediately if the temperature is abnormal or abnormal noise occurs. When replacing the bearing, replace the seals and grease simultaneously.