CAT 094-6959 RETAINER

CAT 094-6959 (0946959) is a dedicated retainer for Caterpillar hydraulic systems/transmission systems. It is commonly used to lock the end caps/bearing housings of hydraulic pumps, motors, or gearboxes, preventing loosening and axial movement caused by vibration. It is suitable for medium to large excavators, loaders, and other equipment, ensuring stable power transmission and reliable sealing.

Core Parameters

Item Details
Part Model CAT 094-6959 (0946959) Locking Device

Type: Heavy-duty machinery locking device, compatible with hydraulic pump/motor/gearbox end caps, bearing seats, anti-loosening, anti-axial movement

Material: 42CrMoA alloy steel, quenched and tempered heat treatment, surface anodized black + Dacromet coating, tensile strength ≥1100MPa, impact resistant, corrosion resistant

Key Dimensions: Diameter approx. 48mm, length approx. 72mm, thread specification M42×2, single weight approx. 1.8kg, compatible with corresponding mounting holes

Compatible Machines: CAT 330, 336 and other excavators, 972, 980 and other wheel loaders, compatible with hydraulic/transmission systems of C9.3, C13 and other engines

Matching Relationship: Commonly used with gaskets and lock nuts, single component with 2-4 Symmetrical Installation and Locking

Suitable for: Hydraulic pump rear end cover, travel motor bearing housing, gearbox input shaft end cover, etc. The locking assembly prevents vibration-induced loosening, ensures sealing and lubrication, and avoids oil leakage and component wear.

Application Scenarios: Suitable for severe vibration conditions such as mining, large-scale earthmoving, and heavy-duty hoisting. Adaptable to medium to large equipment power systems, improving operational stability and safety.

Core Functions: Provides high-strength locking to counteract vibration and impact loads, prevents bolt loosening and axial movement of components, protects seals and bearings, extends component life, and reduces maintenance frequency.

Installation and Maintenance Points
Installation: Clean the threads and mounting holes, apply CAT special anti-loosening adhesive, and tighten in 2-3 steps diagonally to the specified torque (approximately 380-420 N·m), ensuring a tight fit without gaps. After fixing, check for looseness and axial movement.

Maintenance: Check the tightness and coating integrity every 300 hours. Tighten immediately and reapply anti-loosening adhesive if loose. Regularly check for abnormal noises and temperatures in related components; disassemble and repair if abnormalities are found.

Replacement: Prioritize original parts. Verify model and dimensions. After installation, test the power system to ensure it operates normally, without abnormal noises, leaks, or looseness.