CAT 7C-5583 SPACER

CAT 7C-5583 is a precision sealing gasket for Caterpillar engine fuel systems (high-pressure fuel pump/fuel pump mounting gasket). It is used for static sealing between the engine fuel pump and the cylinder block/gear chamber, and is suitable for medium and heavy-duty diesel engines to prevent fuel leakage, maintain stable system pressure, and ensure accurate fuel supply and power output. Cat®… The following is the core information:

Core Technical Parameters
Item Details
Part Model CAT 7C-5583 (7C5583) Fuel Pump Mounting Gasket, flat gasket structure, compatible with fuel pump flange face seal, used for the connection surface between high-pressure fuel pump and cylinder block

Material Core material: Low carbon steel + nitrile rubber (NBR) composite layer, surface coated with oil-resistant coating; hardness Shore A 70-80, thickness tolerance ±0.02mm, suitable for fuel system operating conditions from -40℃ to 120℃

Key Dimensions External dimensions: 90mm×65mm (rectangular), bolt hole diameter 8mm (4 holes evenly distributed), thickness 1.2mm, center positioning hole diameter 25mm, compatible with fuel pump flange face size 90mm×65mm

Compatible Models CAT 3406E/C15/C18 engine, D8R bulldozer, 980G loader and other medium and heavy equipment, compatible with fuel system pressure ≤100MPa High-Pressure Fuel Pump Installation

Performance Parameters: Resistant to fuel oil (diesel/biodiesel), resistant to engine oil; compression ratio 15-20%, rebound rate ≥50%; sealing pressure ≥10MPa; leak-proof rating ≤0.01ml/min

Core Functions and Structural Features

Static Sealing and Leak Prevention: The composite layer structure utilizes compression to fill the microscopic gaps of the flange surface, preventing fuel leakage from the pump body and cylinder mating surface, avoiding fuel waste, fire risk, and power loss (Cat®…).

Oil and Temperature Resistance: The NBR rubber layer is compatible with both fuel oil and engine oil media, while the steel core ensures rigidity, adapting to the high-temperature and high-pressure environment of the engine, with no aging or cracking even after long-term use.

Precise Positioning: The center positioning hole + bolt holes precisely match the fuel pump installation position, ensuring no misalignment after installation, guaranteeing pump body coaxiality, and reducing vibration and abnormal wear.

Easy Installation: The flat gasket design eliminates the need for additional sealant; direct bonding installation reduces assembly time and costs, suitable for quick maintenance scenarios. Installation and Maintenance Points

Installation Specifications: Clean the contact surfaces of the fuel pump flange and cylinder block, removing oil, carbon deposits, and any residue from old gaskets. Ensure the surface is smooth and free of scratches.

Install the 7C-5583 gasket, aligning the positioning holes with the pump shaft. Tighten the bolts diagonally to a torque of 20-25 N·m to avoid uneven pressure that could damage the gasket.

After installation, start the engine and check for fuel leaks around the gasket. Ensure the fuel pressure is stable (meets engine specifications) under idle/acceleration conditions.

Maintenance Recommendations: Check the gasket seal every 3000 operating hours. Replace the gasket immediately if leaks, hardening, or deformation are found to prevent decreased fuel system pressure, insufficient power, and increased fuel consumption.

When replacing the gasket, simultaneously check the flatness of the fuel pump flange surface. The flatness error should be ≤0.05 mm. If not, repair before installation to ensure a proper seal.