Solenoid valve assembly-15-35220

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Komatsu Bulldozers

Solenoid valve assembly-15-35220

PRODUCT DESCRIPTION:

The 56D-15-35220 solenoid valve assembly serves as the core control component in Komatsu's D65/D85 bulldozer hydraulic system. It precisely regulates hydraulic pump flow and pressure to match engine power, ensuring smooth and efficient operations such as pushing and steering. Compatible with mainstream models including the D65E/D85E series, this assembly features high adaptability, rapid response, and exceptional durability.

PRODUCT DETAILS

1.Strong compatibility with original equipment manufacturers (OEMs): Strictly matches D65/D85 hydraulic and electrical systems, with seamless installation dimensions and interfaces, allowing for replacement without modification and reducing compatibility risks.

2.Fast response speed: The electromagnetic components and valve core are machined with high precision (roundness/coaxiality ≤3μm), resulting in low current signal response delay, smooth action switching, and an increase in work efficiency of approximately 8%–12%.

3.Outstanding durability: The valve body is mostly made of cast iron and engineering plastics, and the seals are made of oil-resistant rubber, which is resistant to vibration, oil, and high and low temperatures, making it suitable for harsh working conditions on construction sites and with a long service life.

4.Low maintenance costs: compact structure, easy disassembly and assembly, clear fault codes, short repair/replacement cycle, and reduced downtime.

5.Safety redundancy design: Built-in overload protection prevents damage to components from overcurrent/overvoltage, reducing the probability of system cascading failures.


Installation and Maintenance Points

Clean the hydraulic interface before installation to prevent impurities from entering the valve core and causing jamming.

Ensure wiring is secure and prevent loosening due to vibration. Applying conductive grease is recommended to prevent oxidation.

After replacement, perform idle/full load tests to confirm that pressure and current are within standard ranges and there are no alarm codes.

Regularly inspect the wiring harness insulation and seals. Clean the solenoid valve filter every 500 hours to extend its lifespan.


Fit scenarios and value

Suitable for: Heavy-duty/high-frequency operations such as bulldozing in mines, infrastructure leveling, and farmland reclamation, especially suitable for high-intensity continuous construction conditions of D65/D85.

Core Value: Improves work efficiency by 10%–15%, reduces fuel consumption by 5%–8%, reduces downtime due to malfunctions, and extends the overall lifespan of the hydraulic system.

SPECIFICATION

Project

Details

Part Number

56D-15-35220 (Replacement/Compatibility Number: 425-15-35220)

Compatible Models

Komatsu bulldozers D65 (including D65E, etc.), D85 (including D85E, etc.), also compatible with some D155AX/D275AX models

Core Category

Hydraulic control solenoid valve (commonly PCEPC/LSEPC type, used for main pump flow regulation)

Operating Voltage

DC 24V (Standard electrical system for construction machinery)


Parameters

Typical values

Notes

Operating Voltage

DC 24V

Standard power supply for construction machinery

Operating Current

Idle: 850–1000 mA; High throttle no-load: 160–260 mA

Dynamically adjusts to working conditions

Output Pressure

Idle speed approx. 22–30 bar; High throttle no-load to zero

Adapts to hydraulic system pressure requirements

Valve Body Material

Cast iron + engineering plastics

Balances strength and lightweight design

Sealing Standard

Oil-resistant fluororubber / nitrile rubber

Compatible with hydraulic oil media, leak-proof

Protection Class

IP65 and above

Dustproof and waterproof, suitable for outdoor operations

Response Time

≤100 ms

Ensures immediate action


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