CAT 380-7558 BEARING-SLV-GD

CAT 380-7558 YM is a Caterpillar genuine driveshaft/pin part used for power transmission and support in drive systems, articulated mechanisms, or gearboxes. The following is precise original part information:

Core Technical Parameters
Item Details
Part Model CAT 380-7558 (3807558) YM Shaft

Core Material Alloy steel (42CrMo/4140), overall tempering + surface induction hardening, good core toughness, wear-resistant surface, hardness HRC 55-60

Key Dimensions Nominal diameter 50.80 mm (2.00 in), effective length 177.80 mm (7.00 in), with shoulder positioning and end thread/circlip groove for bearing, gear, or connecting rod positioning

Structural Features Solid shaft structure with positioning shoulder, surface finish (roughness Ra≤0.8 μm), coaxiality ≤0.02 mm, suitable for bearing inner rings and gear splines/ Tight-fit installation

Suitable parts: Mainly used for intermediate shafts of gearboxes/transfer cases, boom/rocker arm main pin shafts of backhoe loaders/loaders, and output shafts of transmission mechanisms.

Matching parts: Compatible bearings (e.g., 471-5911, 360-2318), snap rings (e.g., 2G-4168), bushings, lock nuts, and seals.

Core functions and installation points:

Power transmission and support: As a drive shaft or main pin shaft, it bears torque, bending moment, and radial loads, supports gears, bearings, or connecting rods, and ensures stable power transmission and articulation. Suitable for heavy-duty and impact conditions.

Installation specifications: The shaft diameter surface must be clean, burr-free, and rust-free. The roughness of the mating section Ra≤0.8 μm, and the hardness must meet the standard.

Bearings/gears should be heat-fitted (80-100°C) or cold-pressed. Direct impact to the shaft body is strictly prohibited to prevent deformation or surface damage.

The shoulder end face must fully mate with the bearing/gear end face for reliable positioning; the end should be secured with a snap ring/nut to prevent axial movement.

After assembly, check for radial runout ≤ 0.03 mm, and ensure smooth rotation/oscillation without jamming.

Maintenance Recommendations: Every 1000-1500 working hours, check the shaft diameter for wear, cracks, deformation, and clearance. If any exceed the limits, immediately replace with an original factory shaft.

Hinged pins require regular grease application to prevent dry friction and scratching of the shaft surface.

Use only CAT 380-7558 original factory shafts to ensure material strength and dimensional accuracy, avoiding premature breakage or fit failure.