CAT 586-6809 BEARING-CUP-GD

CAT 586-6809 YM is a Caterpillar genuine double-row tapered roller bearing outer ring, suitable for the drive systems of wheel loaders, articulated trucks, and other similar vehicles. It supports the rollers and withstands radial and bidirectional axial loads, ensuring stable operation of transmission components. The following is precise original part information:

Core Technical Parameters
Item Details
Part Model: CAT 586-6809 (5866809) YM Double-row tapered roller bearing outer ring, weight approximately 4.1 kg (9.04 lb), suitable for positioning conditions of double-row tapered roller bearing outer rings

Core Material: Chromium-molybdenum alloy steel (42CrMo), overall quenching and tempering, surface induction hardening, hardness HRC 58-62, raceway ultra-precision ground (roughness Ra≤0.4 μm), suitable for heavy-duty impact conditions

Key Dimensions: Inner diameter 177.8 mm (7.00 in), outer diameter 247.65 mm (9.75 in), width 69.85 mm (2.75 in), raceway cone angle 15°, compatible with inner ring 586-6810, roller diameter 16 mm, roller length 52 mm

Structural Features: One-piece double-row raceway, outer ring with positioning step, raceway generatrix forms a 15° cone angle with the axis, compatible with double-row tapered rollers, withstands radial and bidirectional axial loads, compatible with gearbox/differential housing mounting holes for positioning.

Compatible Models: CAT 980K/982M wheel loaders, 740/740B articulated trucks, D8T/D8R tracked bulldozers (gearbox second axle/differential double-row tapered bearing outer ring)

Accessories: Compatible inner ring 586-6810, roller assembly 586-6811, cage 586-6812, mounting sleeve 8T-0913 Core Functions and Installation Points

Load Bearing and Positioning: The double-row raceway structure is compatible with double-row tapered rollers, simultaneously bearing radial and bidirectional axial loads, supporting rotating components, preventing axial movement, ensuring stable operation of the transmission system, and suitable for heavy-load and high-frequency vibration conditions.

Installation Specifications: Clean the mounting holes and outer ring surface, removing oil and rust. The inner diameter tolerance of the mounting holes should be H7, and the surface roughness Ra ≤ 1.6 μm.

Use cold or hot mounting (oil temperature 80-100°C). Do not force it. Ensure the outer ring fits snugly against the mounting hole without gaps, and that the raceway and rollers have uniform contact.

After installation, check that the outer ring end face runout is ≤ 0.05 mm and the raceway radial runout is ≤ 0.03 mm to ensure operational accuracy.

Maintenance Recommendations: Check the bearing clearance every 2000 operating hours. If the clearance exceeds 0.2 mm, replace the original outer and inner ring assemblies immediately to avoid abnormal transmission noise or component damage.

Use a special puller when disassembling to avoid deformation of the outer ring or damage to the raceway, which would affect reuse.