Grader Transmission Solenoid
Reliable Hydraulic Flow Control with the Grader Transmission Solenoid Graders and bulldozers depend on steady hydraulic power to lift blades, angle molds, and steer precisely. At the center of that control system is the transmission solenoid valve. When it fails, attachments drop, movement becomes jerky, or the machine stops responding altogether. The grader transmission solenoid from Flying Bull (OE No. 1861525) is a direct replacement built for construction machinery hydraulic systems. This 1861525 solenoid valve controls fluid flow automatically inside the bulldozer or grader hydraulic system. It uses electromagnetic force to open or close internal passages. By doing so, it directs oil flow and regulates flow volume. That allows the operator to control various machine functions – raising and lowering the blade, adjusting the moldboard, or steering the tracks. Flying Bull’s grader transmission solenoid operates in two distinct stages: suction (energized) and release (de-energized). Suction stage (valve energized): When electrical current flows through the solenoid winding, it creates a magnetic field. That field pulls the iron core, which moves the valve spool. The spool closes specific inlet and outlet channels on the valve body. Oil flows from one inlet port, while another port connected to a hydraulic cylinder closes. Pressure builds up, pushing the cylinder to move at a controlled speed. Release stage (valve de-energized): When power stops, the magnetic field disappears. The iron core separates from the valve spool. The blockage on the valve body clears, allowing oil to flow back to the tank. Hydraulic pressure in the cylinder releases, and the cylinder stops moving or returns to its original position. This 1861525 solenoid valve is built with high-quality materials and advanced manufacturing processes. It offers high reliability and stable operation even in harsh environments – dirt, moisture, vibration, and temperature swings common on construction sites. The valve operates with oil as the medium under ordinary pressure. It is 100% brand new, manufactured in Zhejiang, China, and backed by a 1‑year warranty. Delivery takes 5–7 working days. Common applications for the grader transmission solenoid: Bulldozers (final drive and blade control). Motor graders (moldboard and articulation circuits). Track loaders and other heavy construction equipment. For equipment owners and repair shops, replacing a failed grader transmission solenoid 1861525 restores proper hydraulic function. Keep one in your parts inventory to reduce downtime when a bulldozer or grader loses hydraulic control. Choose Flying Bull for dependable solenoid valves in construction machinery.
Product Introduction
Products Description
OE NO.: 1861525 |
Media: Oil |
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Warranty: 1 YEAR |
Condition: New, 100% Brand-new |
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Place of Origin: Zhejiang, China |
Item: Solenoid |
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Brand Name: FLYING BULL |
Quality: High-Quality |
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Delivery: 5-7 Working Days |
Pressure: Ordinary Pressure |
Grader transmission solenoid 1861525 Construction machinery parts
Grader transmission solenoid 1861525 is used to control the automatic components of the fluid flow in the bulldozer hydraulic system, through the electromagnetic force to control the opening and closing of the valve, and then control the flow direction and flow size of the oil in the hydraulic system, to achieve the control of various operating functions of the bulldozer.
The working process of the grader transmission solenoid 1861525 is mainly divided into two stages: suction and release.
1. Suction stage: When the solenoid valve is energized, the electromagnet winding generates a magnetic field, and the magnetic field acts on the iron core, so that the iron core absorbs the valve core and closes the inlet and outlet channels on the valve body. At this time, the oil flows from one inlet of the valve body, and the other outlet connected to the hydraulic cylinder is closed, and the pressure continues to accumulate, pushing the hydraulic cylinder to move at a certain speed.
2. Release stage: When the solenoid valve stops energizing, the magnetic field disappears, the iron core is separated from the valve core, the block on the valve body disappears, and the oil continues to flow back to the tank through the valve body. The hydraulic oil in the hydraulic cylinder is relaxed, the hydraulic oil is reflow, and the position of the hydraulic cylinder stops changing.
High reliability: Due to the use of high-quality materials and advanced manufacturing processes, the grader transmission solenoid 1861525 has high reliability and can work stably in harsh environments.
Company Introduction
Frequently Asked Questions (FAQ)
1. What is the OE number and basic function of this grader transmission solenoid?
The OE number is 1861525. This solenoid valve is an automatic component that controls fluid flow in bulldozer and grader hydraulic systems. It uses electromagnetic force to open or close the valve, directing oil flow and regulating flow volume to control various machine functions.
2. How does the 1861525 solenoid valve work?
The valve operates in two stages. Suction stage (energized): The solenoid creates a magnetic field that pulls the iron core, moving the valve spool to close certain ports. Pressure builds up, moving the hydraulic cylinder. Release stage (de-energized): The magnetic field disappears, the core separates, and the valve opens. Oil flows back to tank, and the cylinder stops or returns.
3. What machine functions does this solenoid valve control?
On graders and bulldozers, the 1861525 solenoid controls functions such as raising and lowering the blade, angling the moldboard, steering, and attachment movements. It directs hydraulic oil to the correct cylinders at the right time for smooth, precise operation.
4. What happens when the grader transmission solenoid fails?
Common failure symptoms include: the blade not lifting or lowering, slow or jerky attachment movement, the machine losing hydraulic power, oil leaks around the solenoid, or the transmission getting stuck in one range. In some cases, diagnostic fault codes will appear.
5. Is this solenoid valve suitable only for graders, or does it work on other machinery?
While called a grader transmission solenoid, the 1861525 is used in bulldozer hydraulic systems as well. It is a general-purpose hydraulic control solenoid for construction machinery. It may also fit track loaders and similar heavy equipment. Always verify your original OE number before ordering.
6. Why is high reliability important for this solenoid valve?
Construction machinery operates in harsh conditions – dirt, dust, mud, temperature extremes, and constant vibration. A solenoid valve that fails in these conditions causes expensive downtime. The 1861525 uses high-quality materials and advanced manufacturing to work stably in those harsh environments.
7. Does this grader transmission solenoid come with a warranty?
Yes. Flying Bull provides a 1‑year warranty against manufacturing defects. Damage caused by contaminated fluid, incorrect installation, voltage spikes, or overpressure is not covered. Always use clean hydraulic oil and follow proper installation procedures.
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