CAT 308-9934 SPACER-GD

CAT 308-9934 GD is a Caterpillar General Duty flat gasket, suitable for flange face sealing of components such as gearbox housings, hydraulic pump end covers, and differential housings, preventing oil leakage and impurity intrusion. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 308-9934 GD, Type: Asbestos-free composite fiber + metal skeleton flat gasket, surface coated with nitrile rubber (NBR) sealing coating, unit weight approximately 0.08 kg, suitable temperature -30℃ to +120℃, sealing medium: hydraulic oil, gear oil, engine oil, suitable for medium and low pressure conditions (≤2.5 MPa)

Key Dimensions
Outer diameter 120 mm, inner diameter 80 mm, thickness 3 mm, number of bolt holes 6, bolt hole diameter 10 mm, bolt hole distribution circle diameter 100 mm, sealing surface width 20 mm, flatness ≤0.02 mm, surface roughness Ra≤3.2 μm, tolerance ±0.1 mm Cat® Parts
Compatible Models and Parts: Compatible with Cat 950H loader gearbox end caps, 320D excavator hydraulic pump housings, and D6N bulldozer differential housings. 2-4 pieces per machine. Suitable for static sealing, medium-load conditions, uniform flange pressure, and environments without severe vibration.

Performance Parameters: Compression ratio 15%-25%, rebound rate ≥40%, tensile strength ≥5 MPa, oil resistance conforms to ISO 1817 standard, aging resistance conforms to ASTM D573 standard, maximum sealing surface gap ≤0.2 mm.

Structural and Performance Advantages:
Material and Process: Asbestos-free composite fiber material, environmentally friendly and suitable for engineering machinery sealing requirements; metal skeleton enhances gasket rigidity to prevent deformation during installation; NBR coating improves sealing surface fit; suitable for medium and low pressure conditions; GD universal operating condition design, high cost-effectiveness, suitable for maintenance of non-extreme operating equipment.

Cat® Parts Reliable Sealing: The composite fiber material possesses excellent compression resilience, compensating for minor deformations and roughness of the flange surface. The NBR coating enhances sealing performance, effectively preventing oil leakage and ensuring stable sealing in static sealing scenarios.

Easy Installation: Precise bolt hole positioning eliminates the need for complex positioning fixtures. During installation, simply align the bolt holes on the flange surface and tighten the bolts evenly, improving maintenance efficiency.

High Compatibility: Precisely matches original Cat flange surfaces and bolts, offering high versatility and adaptability to similar sealing parts on various models, reducing spare parts inventory costs.

Installation and Maintenance Points: Clean the flange surface before installation, removing burrs, oil, and old sealant residue. Check the flange surface for scratches and deformation. When installing the gasket, pay attention to the orientation of the sealing surface; ensure the coated side aligns with the flange sealing surface to avoid reverse installation.

Tightening Specifications: Bolts are M8×1.25, with a torque of 25-30 N·m. Tighten symmetrically in 2-3 stages to prevent uneven stress on the gasket, which could lead to leakage.

Maintenance cycle: Check the sealing condition every 2000 hours. If leakage, gasket aging, or deformation occurs, replace it immediately; avoid loose flange bolts that could cause gasket seal failure.