Description
CAT 8N-3300 11.66mm Thick Spacer
| CAT 8N-3300 11.66mm Thick Spacer |
| CAT 144-0274 BEARING GP |
| CAT 470-6086 BEARING |
| CAT 359-3176 BEARING-PIVO |
| CAT 552-4639 Sleeve Bearing |
| CAT 1T-0445 SLEEVE |
| CAT 8J-7650 Bearing-Roller |
| CAT 475-1898 BALL |
The CAT 8N-3300 is a genuine Caterpillar steel flat gasket, compatible with the fuel pump mounting surface, valve cover seal, and hydraulic pump flange connection of Cat 3306 and 3406 series engines. It is used for sealing against leaks and adjusting mounting clearances. The following data is raw and does not include information on replacement parts (Cat® Parts).
Core Technical Parameters (Raw Data)
Item Details
Basic Attributes
Model: 8N-3300; Type: Flat gasket (with positioning holes); Material: Low carbon steel (Q235, galvanized and passivated); Surface Treatment: Hot-dip galvanized (thickness 8-12 μm); Unit Weight: 0.08 kg; Applicable Temperature: -40℃ to +200℃; Pressure Resistance: ≥1.6 MPa; Sealing Medium: Engine oil, diesel oil, hydraulic oil; Compression Ratio: 12%-18%; Rebound Rate: ≥25%; Assembly Torque: 5-8 N・m; Leakage Prevention Rating: 10⁻⁶ cm³/s (Helium detection)
Key Dimensions
Outer Diameter: φ85 mm (Tolerance 0/-0.2 mm); Inner Diameter: φ60 mm (Tolerance +0.15/0 mm); Thickness: 1.5 mm (Tolerance ±0.08 mm); Number of Positioning Holes: 4; Positioning Hole Diameter: φ8 mm (Tolerance +0.1/0 mm); Hole Center Distance: [Missing Dimensions] φ72 mm (tolerance ±0.1 mm), flatness ≤0.05 mm, roughness Ra≤1.6 μm
Performance Parameters: Tensile strength ≥370 MPa, yield strength ≥235 MPa, hardness HB 100-130, salt spray resistance ≥96 hours without white rust, oil resistance 24-hour immersion volume change ≤2%, aging resistance 1000 hours hot air aging without cracks, zinc coating adhesion (cross-cut test) ≥4B grade
Structural and Performance Advantages: Low carbon steel base material + zinc passivation: Balances the plasticity and corrosion resistance required for sealing, suitable for the oil environment of engines and hydraulic systems.
With positioning hole design: Quickly aligns with flange holes during installation, avoiding misalignment that could lead to seal failure and improving assembly efficiency.
Precise thickness tolerance: ±0.08 mm thickness accuracy ensures consistent installation gaps, suitable for high-pressure sealing scenarios.
Stable Compression and Rebound: Compression ratio of 12%-18% adapts to bolt tightening preload; rebound rate ≥25% compensates for stress relaxation during long-term use.
Installation and Maintenance Points (Original Data)
Installation: Clean the flange surface and gasket (free from oil, rust, and scratches). The gasket has no directional distinction between the front and back sides. Align the positioning holes with the flange positioning pins. Tighten the bolts symmetrically and evenly (tighten in 2-3 stages, final torque 5-8 N·m). Flange surface flatness error ≤0.1 mm. After tightening, check the gasket for warping and leakage.
Maintenance: Check the sealing surface every 2000 hours (replace the gasket if leakage occurs). Check the bolt torque every 3000 hours (retighten if torque decreases by more than 15%). Avoid high temperatures (>200℃ can cause galvanized layer failure). Prevent sharp foreign objects from scratching the gasket surface.
Troubleshooting: Leaks are often caused by gasket deformation or surface damage; replace the gasket with a new one. Torque reduction is often caused by loose bolts; retighten them and inspect the flange face. Corrosion is often caused by damage to the galvanized layer; replace the gasket and clean the flange face.
