This is a hydraulic solenoid valve designed for Caterpillar excavators, with part numbers 312-8629 (3128629) and 183-7595 (1837595), perfectly compatible with models including 143H, 950M, 966H, and 982XE.
Structural Features: It features a metal housing and threaded cartridge design, equipped with a 2-pin electrical connector. Multiple sealing rings at the end ensure tightness for the hydraulic system, enabling stable control of hydraulic oil flow and on/off switching.
Functional Purpose: As a core control component in the excavator hydraulic system, it is mainly used for pilot control and hydraulic circuit switching, ensuring precise and reliable operation of the equipment.
Material Advantage: The valve body is made of high-strength alloy material, which is corrosion-resistant and wear-resistant, capable of withstanding the high-pressure and high-frequency working conditions in complex construction machinery environments.
🔹 Product Name:Caterpillar Hydraulic Control Solenoid Valve
Part Numbers:312-8629 (Primary), 183-7595 (Compatible)
Compatible Models:
Wheel Dozers: 143H
Track Loaders: 950M, 966H, 982XE
Other Compatible Models: 824C/824G II/824H, 834H/834K, 844H, 854G/854K, 963D/963K, 973/973D/973K, etc.
Core Functions:
Hydraulic System Control:Drives spool movement via electrical signals to control hydraulic oil flow direction, on/off switching, and pressure regulation, matching engine output with hydraulic pump power.
Operating Mode Switching:Manages hydraulic distribution for travel, steering, and bucket operations, ensuring smooth and precise machine control.
Safety Protection:Automatically resets when power is cut off to prevent unintended movements and ensure safe emergency shutdown.
Product Advantages:
OEM-level Fitment:Strictly follows Caterpillar dimensional standards with excellent sealing performance to eliminate hydraulic leaks.
High Durability:Metal housing and wear-resistant spool design withstands harsh construction site conditions (high vibration, dust).
Easy Installation:Standard 2-pin waterproof electrical connector for plug-and-play replacement of original parts.
Wide Compatibility:Covers multiple Caterpillar large-tonnage construction equipment series for versatile use.
Application Scenarios:
Repair & Replacement:Resolves issues such as slow machine response, engine stalling under load, and hydraulic system abnormalities.
System Upgrades:Optimizes hydraulic control logic to improve operational efficiency and fuel economy.







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No. 23 Bridge Pier, Chengfeng Excavator Parts, Baoye City Green Garden (East Area), Tongling Road, Datong Road Subdistrict, Yaohai District, Hefei, Anhui, China.
13427233834
+8613427233834
18820999946@163.com
13427233834@163.com