CAT 039-8914 CAP-BRG

CAT 039-8914 is a genuine Caterpillar bearing cover (purely original and accurate information, no additional description). It is compatible with hydraulic pump bearing housings, fan pulley bearing end covers, or gearbox axle bearing covers in C7/C9 engines, 320D/323D excavators, 950H/966H loaders, etc. It works in conjunction with 039-6449/039-6450 bearings, 039-8729 axle retaining rings, and 038-7406 bearing housings, providing sealing and dust prevention, axial positioning, and bearing protection to ensure stable operation of transmission components.

Core Parameters and Information

Item Details
Part Model: CAT 039-8914 (0398914) Bearing Cover

Type: Cast iron bearing end cover with sealing groove and mounting flange, suitable for deep groove ball bearings/cylindrical roller bearing end face sealing and positioning

Material: HT250 gray cast iron, body hardened, surface anti-corrosion coating, sealing groove compatible with NBR nitrile rubber seals

Key Dimensions: Inner diameter 100 mm, outer diameter 130 mm, flange diameter 150 mm, thickness 18 mm, bolt hole distribution circle diameter 120 mm, number of bolt holes 4, hole diameter 10 mm, sealing groove diameter 102 mm, groove width 3 mm, weight 0.85 kg

Sealing Form: Integrated O-ring sealing groove, compatible with 038-7407 seals, protection rating IP54, prevents dust and moisture intrusion

Applicable Temperature: -40℃～ +150℃, suitable for engine compartment and transmission system temperature environments.

Accuracy Grade: Dimensional tolerance ±0.1 mm, flatness 0.05 mm, meeting the assembly and positioning requirements of engineering machinery.

Installation Method: Bolt tightening, flange fitting the bearing housing end face, pre-installed O-ring in the sealing groove to ensure reliable sealing and no leakage.

Compatible Models and Assemblies

Compatible Parts: CAT 039-6449/039-6450 bearings, 039-8729 shaft retaining rings, 038-7406 bearing housings, 038-7407 sealing rings, 039-5618 bore retaining rings

Compatible Equipment: CAT 320D/323D excavators, 950H/966H loaders, D6R bulldozers, etc., equipped with C7/C9 engines, used for hydraulic pump input shaft bearing ends, fan pulley bearing covers, gearbox second shaft bearing covers, etc.

Matching Parts: 039-8914 Bearing cap, 039-6449/039-6450 bearing, 039-8729 shaft retaining ring, 038-7406 bearing housing, 038-7407 sealing ring

Installation and Maintenance Points
**Before installation, clean the bearing cap sealing groove, flange face, and bearing housing mating surfaces, ensuring no burrs, oil stains, or rust. Inspect the bearing cap for cracks, deformation, or coating peeling.

Embeddeset the 038-7407 O-ring into the sealing groove, apply a thin layer of grease, and evenly apply sealant to the flange face. Align the flange with the bearing housing bolt holes and tighten with M10×30 bolts to a torque of 25-30 N·m.

After installation, check that the bearing cap fits snugly against the bearing end face, with no axial clearance, no leakage at the seal, and no interference between rotating parts.

Maintenance: Check the sealing condition and bolt tightness every 1500 working hours. Replace immediately if leakage, deformation, or cracks are found to prevent water or dust from entering and damaging the bearing.