Komatsu Grader Drive Axle Main Reducer Housing 23B-15-00231

Core Features

Core Load Bearing: Bears the radial/axial load of the main reducer gear meshing (maximum radial load ≥80 kN), supports the power transmission axis of the drive shaft and half shaft, and ensures transmission accuracy.

Sealing Protection: Prevents gear oil leakage and isolates the internal gears and bearings from the intrusion of construction dust, mud, and gravel through end face gaskets and skeleton oil seals.

Precise Positioning: The accuracy of the bearing housing hole and gear mounting reference surface is ≤0.02 mm, ensuring that the gear meshing clearance (0.15–0.25 mm) and contact patch (≥70%) of the main reducer meet the standards.

Heat Dissipation Assistance: Cast iron material and heat dissipation fin design accelerate the dissipation of gear oil heat, controlling the working oil temperature at 80–100℃ to prevent oil failure due to high temperature.

Product superiority

1. Material and Structural Advantages

High-strength cast iron material: HT300 high-grade gray cast iron, tensile strength ≥300 MPa, aged to eliminate internal stress, resistant to deformation and impact, suitable for graders with a working weight of 18–22 t.

Precision machining benchmarks: Bearing hole roundness ≤0.01 mm, flange surface flatness ≤0.02 mm, high connection accuracy with the main reducer cover and drive axle housing, requiring no repairs during installation.

All-condition sealing: Double-layer skeleton oil seal + nitrile rubber gasket, oil-resistant and temperature-resistant (-40~+120℃), waterproof and dustproof rating IP65, suitable for muddy and dusty working conditions.

Integrated design: One-piece molded heat dissipation fins (≥12 fins), heat dissipation area ≥0.8 m², improving heat dissipation efficiency by 30% compared to ordinary shells.

2. Performance and Maintenance Advantages

Guaranteed Transmission Precision: Gear installation reference error ≤0.02 mm, ensuring transmission efficiency ≥96%, reducing power loss and noise (≤80 dB).

Long Lifespan Design: Aging treatment + surface anti-rust coating, corrosion resistant, service life ≥10,000 working hours, 50% longer than ordinary cast housings.

Convenient Maintenance: Pre-reserved oil filling/draining ports and oil level inspection holes facilitate regular gear oil changes (every 2000 hours); lifting position design improves disassembly and assembly efficiency by 40%.

High Safety Redundancy: One-piece molded, weld-free structure, strong impact resistance, preventing housing breakage due to heavy loads or impacts, protecting internal core components.

Installation and Maintenance Recommendations

1.Installation Points

Cleaning and Inspection: Clean the housing bearing bore, flange face, and sealing groove, checking for cracks and pinholes; the clearance between the bearing housing bore and the bearing should be 0.005–0.015 mm.

Sealing Assembly: Apply silicone sealant (model: 3145) to the sealing groove, ensure the gasket is properly installed to avoid misalignment; the lip of the skeleton oil seal should face the oil cavity, and the installation pressure should be ≤50 kN.

Tightening Specifications: Tighten the flange bolts diagonally, with a torque of 120–150 N·m, ensuring a ≥99% fit at the connection surface and no leakage.

Oil Level Adjustment: After installation, add 85W-90 heavy-duty gear oil to the lower edge of the oil level hole, avoiding excessive oil leading to overheating or insufficient oil leading to poor lubrication.

2.Maintenance

Routine Inspection: Check the housing for cracks, oil leaks, and oil level during each shift. Address any abnormalities promptly.

Regular Oil Change: Change the gear oil every 2000 hours, and clean the magnetic bolt at the drain port to remove metal shavings.

Replacement Cycle: It is recommended to check the housing precision every 10,000 hours or 3 years (whichever comes first). Replace immediately if bearing bore wear or cracks are found.

Troubleshooting: If the housing leaks oil, first check the gaskets and oil seals. Replace them if necessary and check the flange flatness. If abnormal noise is heard, check the gear meshing of the main reducer and the bearing clearance.

Summarize

23B-15-00231 Engineered with high-strength cast iron and precision machining, this component is factory-certified to deliver stable transmission support and sealing protection for multiple Komatsu flatbed models. Featuring high load capacity, efficient heat dissipation, and easy maintenance, it significantly reduces failure risks and operational costs, serving as the core structural element that ensures optimal transmission system performance.