CAT 7I-7586 4mm Thick Valve Spring Seat

CAT 7I-7586 is a Caterpillar original spring mount (also called a spring seat), used to position and support springs in engine valve mechanisms or hydraulic systems. It is used to fix compression springs, transmit loads, and dampen vibrations. The following is pure original data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 7I-7586, Type: Integrated Spring Base, Suitable for Valve Springs/Hydraulic Valve Springs, Single Weight: 0.85 kg, Material: 4140 Alloy Steel (Surface Hardened, Hardness HRC 48-52), Used in Engine Valve Chambers, Hydraulic Pilot Valve Assemblies, etc., for spring positioning, load transfer, and anti-loosening functions.

Key Dimensions (Metric/Imperial)
Base Outer Diameter: 55.0 mm (2.165 in, Tolerance ±0.02 mm), Inner Diameter: 30.0 mm (1.181 in, Tolerance +0.01/-0 mm), Total Height: 28.0 mm (1.102 in, Tolerance ±0.1 mm), Positioning Step Height: 8.0 mm, Mounting Hole Diameter: 12.0 mm (Tolerance +0.01/-0 mm), Bolt Hole Center Distance: 42.0 mm

Performance Parameters
Load Capacity ≥12 kN, operating temperature -40℃ to +180℃, fatigue resistance ≥10⁶ cycles, corrosion resistance IP65, suitable spring wire diameter 6-8 mm, spring mating clearance 0.05-0.10 mm

Structure and Compatibility Characteristics

One-piece structure: Precision machined after integral forging, no welding seams, high strength and rigidity, suitable for high-frequency reciprocating conditions, preventing base deformation from causing spring wear or failure.

Positioning step design: Built-in 8 mm positioning step, precisely limiting the radial displacement of the spring, ensuring the spring axis is coaxial with the base, reducing vibration and noise.

Machine compatibility: Compatible with valve mechanisms or hydraulic pilot valve assemblies of engines 3116, 3126, 3306, excavators 320B, 325B, loaders 938G, 950F, etc., used to support valve springs or hydraulic valve springs, ensuring stable valve/valve core reset, improving system sealing and response speed.

Installation and Maintenance Points (Original Data)

Installation: Clean the mounting surface and base (free from oil, rust, and burrs). Align the base positioning step with the spring end face and tighten with M12×1.5 bolts, controlling the torque to 35-40 N·m. After installation, check the spring coaxiality; tolerance ≤ 0.05 mm. Ensure the spring is free from jamming or misalignment.

Maintenance: Check the base for wear and deformation every 1500 hours. Replace immediately if surface wear > 0.2 mm, step height < 7.5 mm, or cracks appear. Regularly check the bolt tightness to prevent loosening that could lead to spring failure.