CAT 3W-3102 Equalizer Bar Cap

CAT 3W-3102 is a Caterpillar genuine hydraulic oil port dust cover/plug cap (CAP), commonly used on hydraulic oil pipe interfaces, cylinder ports, pump valve joints, etc., of loaders, excavators, and other equipment. It serves to prevent dust, oil leakage, and foreign object intrusion. It is compatible with CAT 950G/962G loaders, 320C/325C excavators, etc., ensuring the cleanliness of the hydraulic system and reducing wear on valve assemblies and cylinders.

Core Technical Parameters

Item Details
Part Model: CAT 3W-3102 Hydraulic Oil Port Dust Cover, alternative model 3W-3102-001, corresponding standard interface specification 1/2″ NPTF
Material: Main body is modified nylon PA66, resistant to mineral oil, hydraulic oil and ethylene glycol antifreeze, operating temperature -40℃ to 120℃, surface with anti-slip texture, built-in nitrile rubber (NBR) seal ring, sealing pressure ≤0.5MPa, suitable for static sealing conditions

Key Dimensions: Outer diameter 28mm, height 15mm, thread specification 1/2″ NPTF, sealing inner diameter 15mm, seal ring cross-section diameter 2mm, compatible with 1/2-inch hydraulic oil ports, thread accuracy conforms to ANSI B1.20.1 standard

Compatible Models: Compatible with CAT 950G/962G loaders, 320C/325C This product is suitable for excavators and 420F/430F backhoe loaders, and is used for dustproofing quick-connect hydraulic hose couplings, protecting cylinder piston rod ends, plugs for spare pump and valve interfaces, and protecting accumulator charging valves.

Performance Features: Lightweight and impact-resistant nylon material; reliable static seal with NBR sealing rings; anti-slip texture for easy manual installation and removal; suitable for the static sealing requirements of hydraulic systems; prevents dust, moisture, and impurities from entering the oil port, avoiding hydraulic oil contamination and ensuring normal system operation.

Core Functions and Structure:

Dustproof and Contamination-Proof Sealing: The built-in NBR sealing ring fits tightly against the oil port, preventing dust, sand, moisture, and other foreign objects from entering the hydraulic interface. This prevents contaminants from entering precision components such as pumps, valves, and cylinders with the hydraulic oil, reducing wear and the risk of failure.

Leakage Prevention and Interface Protection: Prevents hydraulic oil leakage from the interface during equipment shutdown, maintenance, or transportation. It also protects the oil port threads and sealing surfaces from impact damage during handling or storage, extending the interface’s service life.

Easy Installation/Removal and Identification: Lightweight nylon material with a non-slip textured design facilitates quick and easy manual installation and removal without special tools. Some models feature color-coded labels to distinguish different hydraulic circuit interfaces, improving maintenance efficiency.

Installation and Maintenance Points
Installation Specifications: Clean the oil port threads and sealing surface, removing oil, metal shavings, and other impurities. Check the oil port for burrs and thread damage, ensuring the sealing ring is undamaged and undeformed.

Manually screw the dust cover into the oil port, controlling the tightening torque to 8-12 N·m. Avoid over-tightening, which can strip the threads or damage the sealing ring. Ensure a tight seal without looseness.

After installation, check for leaks around the interface. For equipment intended for long-term storage, apply a small amount of grease to the sealing ring to enhance the seal and prevent aging and adhesion.

Maintenance Recommendations: During each equipment maintenance check: Inspect the dust cover for cracks or deformation, and the sealing ring for aging or damage. If any of these issues are found, replace the cover immediately to prevent seal failure.

When replacing, prioritize the original 3W-3102 dust cover of the same model. Non-original parts may have problems such as insufficient thread precision or poor sealing ring material, resulting in poor sealing or difficulty in installation and removal, which will affect the cleanliness of the hydraulic system.