Product Description
The Allen-Bradley 803-A74 is a robust, heavy-duty rotation cam switch (Type A, 803 series) built for demanding industrial environments. Its NEMA Type 4 & 13 enclosure protects internal components from oil, chemicals, water, and ice, allowing for reliable indoor/outdoor operation. Featuring double break contacts rated at 25 Amps, a standard left shaft operating at 150 RPM, and seven adjustable cams (14-346 degrees), it's designed for heavy-duty machinery, particularly in the oil & gas industry. Its durable steel base, cast iron side plates, anti-vibration mechanism, and oversized shaft bearings ensure long-lasting performance. The unit measures 17.38 inches (441.3 mm) and weighs 54 pounds (24.5 kg), slightly heavier than the original model due to its enhanced enclosure.
Is Your Device Showing These Signs?
The Allen Bradley 803-A74 encounters common failures such as coil burnout due to overvoltage or inrush current, contact erosion from repetitive switching of inductive loads, and mechanical wear affecting armature movement. Troubleshooting includes verifying coil resistance, inspecting contact surfaces for pitting or welding, and assessing spring tension and armature alignment. Replacement of the coil, contacts, or entire starter assembly resolves these issues, ensuring proper motor control and overload protection. Proper voltage supply and surge suppression mitigate future failures.
Technical specifications
The Allen-Bradley 803-A74 is a heavy-duty rotation cam switch designed for harsh industrial environments. It features a protective NEMA 4 & 13 enclosure, high-amperage double break contacts, a standard left shaft operating at 150 RPM, and seven adjustable cams. Its robust construction, including a steel base, cast iron side plates, and anti-vibration mechanism, ensures durability and reliable performance, particularly in applications like oil & gas. It's a relatively large and heavy unit, weighing 54 pounds.
Our Repair Process for the
803-A74
Our repair process for the Allen Bradley 803-A74 begins with a thorough troubleshooting procedure that verifies coil resistance, inspects contact surfaces for pitting or welding, and assesses spring tension and armature alignment. Upon identifying the failure, the coil, contacts, or the entire starter assembly is replaced as needed. This replacement ensures proper motor control and overload protection. To prevent future failures, verify proper voltage supply and implement surge suppression measures.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.
Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.
Buying Options
To receive a quote within 2 hours, please provide us with the details of your requirements. Our team will promptly review your request and send you a custom offer.
Ships from Rochester, NY