Heiher Dump Trailer Solenoid 4-Terminal KTI 391-2-C 100A Relay

Description

Product Overview

The Heiher 4‑terminal dump trailer solenoid, model KTI 391‑2‑C, is engineered to deliver a solid 100 A intermittent duty rating, making it an ideal replacement for a wide range of hydraulic dump trailer applications. Constructed from high‑grade engineering plastic and copper, the unit combines corrosion resistance with excellent electrical conductivity, ensuring long‑term reliability even in harsh outdoor environments. Its compact dimensions—approximately 3.46 x 3.15 x 2.83 inches—and lightweight design (10.55 ounces) allow for straightforward integration into existing trailer control panels without the need for extensive modifications. The solenoid’s four‑terminal configuration provides clear wiring options, simplifying the connection process and reducing the chance of installation errors.

Designed to replace legacy part numbers such as SAZ‑4201GJ, SAZ4201GJ, 7522, 07522, 190107, 070009, and 391‑2‑C, this solenoid offers a direct fit for many popular dump trailer brands, including Load Trail and Parker Performance. The product’s specifications are verified against the original equipment manufacturer’s standards, guaranteeing that performance characteristics such as coil resistance, pull force, and response time meet or exceed the requirements of demanding dump trailer operations. The solenoid’s robust construction also includes reinforced terminal posts that resist loosening under vibration, a common issue in mobile equipment.

In addition to its mechanical durability, the Heiher solenoid incorporates a sealed coil housing that protects the internal windings from moisture, dust, and chemical exposure. This sealing helps maintain consistent electrical performance over the lifespan of the unit, reducing the likelihood of premature failure due to environmental factors. The solenoid’s design also features a low‑profile mounting bracket that can be secured with standard hardware, eliminating the need for custom fabrication or drilling. This user‑friendly approach shortens downtime during maintenance and ensures that technicians can replace the unit quickly and safely.

Overall, the Heiher 4‑terminal dump trailer solenoid delivers a balanced combination of high current capacity, durable materials, and ease of installation, making it a cost‑effective solution for operators seeking to restore or upgrade the functionality of their dump trailers. Whether you are addressing a malfunctioning starter solenoid or proactively replacing an aging component, this unit provides the reliability and performance needed to keep your equipment operating smoothly.

Usage

This solenoid is suited for a variety of dump trailer scenarios, ranging from construction site material handling to agricultural waste management. It excels in environments where frequent start‑stop cycles place significant stress on electrical components, thanks to its 100 A intermittent duty rating that can handle the high inrush currents typical of hydraulic pump activation. Operators will find the unit particularly beneficial when dealing with trailers that experience heavy loads, steep inclines, or frequent directional changes, as the solenoid’s reliable actuation helps maintain consistent hydraulic pressure throughout the operation.

Installation is straightforward and does not require specialized tools. The four‑terminal layout aligns with standard wiring diagrams used in most dump trailer control systems, allowing technicians to replace the existing solenoid in a matter of minutes. No cutting or drilling is necessary, and the unit can be mounted using the existing bolt holes, preserving the integrity of the trailer’s frame. This simplicity reduces labor costs and minimizes the risk of installation errors that could lead to electrical faults or safety hazards.

Beyond its primary function as a starter solenoid, the unit can also serve as a backup or auxiliary relay in custom hydraulic setups, providing additional flexibility for users who wish to expand or modify their trailer’s control architecture. Its robust construction ensures that it can withstand the vibration and shock associated with off‑road travel, making it a reliable component for mobile applications such as dump trucks, flatbed carriers, and specialized equipment transporters.

For maintenance personnel, the solenoid’s sealed design means that routine inspections can be performed without disassembly of the housing, allowing for quick visual checks of terminal integrity and connector condition. When a replacement is required, the same mounting points and wiring scheme can be reused, ensuring a seamless transition that does not disrupt the overall system layout. This ease of service contributes to reduced downtime and higher equipment availability, which are critical factors in commercial operations.

Why Choose Us

Choosing the Heiher solenoid means selecting a product backed by a reputation for quality and reliability in the industrial and scientific market. Heiher’s manufacturing processes adhere to stringent quality control standards, including ISO‑9001 certification, ensuring that each unit undergoes comprehensive testing for electrical performance, mechanical strength, and environmental resistance before it reaches the customer. This commitment to quality translates into a longer service life and fewer unexpected failures, providing peace of mind for operators who depend on their equipment for daily productivity.

Our solenoid also benefits from a robust supply chain that guarantees consistent availability of the exact model you need, reducing lead times and preventing inventory shortages. The product’s compatibility with a wide range of legacy part numbers means that you can replace multiple different OEM components with a single, standardized part, simplifying inventory management and reducing the complexity of spare parts logistics. This universality is especially valuable for fleet operators who maintain diverse equipment fleets.

In addition to the physical product, Heiher offers comprehensive technical support, including detailed installation guides, wiring diagrams, and responsive customer service teams ready to assist with troubleshooting or fit‑ment questions. Our after‑sales service includes a warranty that covers manufacturing defects, reinforcing our confidence in the durability of the solenoid and providing added value to the purchaser.

Finally, the environmental considerations of our design reflect a commitment to sustainability. By using recyclable plastic materials and copper that meets RoHS standards, the solenoid minimizes its ecological footprint while still delivering high performance. This balance of durability, serviceability, and environmental responsibility makes the Heiher solenoid a forward‑thinking choice for modern industrial applications.

Key Features

• High‑current 100 A intermittent duty rating ensures reliable operation under heavy load conditions.
• Durable plastic housing and copper coil provide rust resistance and long service life.
• Four‑terminal design matches multiple OEM part numbers for easy replacement without rewiring.
• Sealed coil protects against moisture, dust, and chemicals, maintaining consistent performance.
• Comprehensive technical support and warranty give confidence in long‑term reliability.

FAQ

What vehicles are compatible with this solenoid?

The solenoid is compatible with most hydraulic dump trailers, including those from Load Trail, Parker Performance, and other brands that use part numbers SAZ‑4201GJ, 07522, 190107, or 391‑2‑C.

Can I install the solenoid myself?

Yes, the unit is designed for easy installation with no cutting or drilling required. It uses a standard four‑terminal layout that matches existing wiring diagrams, allowing most users with basic electrical knowledge to replace the old solenoid in a few minutes.

What is the warranty period for this product?

Heiher provides a one‑year limited warranty covering manufacturing defects, giving you confidence in the product’s durability and performance.

Is the solenoid suitable for continuous duty applications?

This model is rated for intermittent duty, meaning it is ideal for start‑stop cycles typical of dump trailer operations. For continuous duty, a different model with a higher duty rating should be selected.

How does the sealed coil benefit my equipment?

The sealed coil protects the internal windings from moisture, dust, and chemical exposure, which helps maintain consistent electrical performance and reduces the risk of premature failure caused by environmental factors.