Rite-Hite Fastrax Door Manual Your Comprehensive Guide

Rite-Hite Fastrax Door Manual: Unlocking the secrets to smooth, safe, and efficient operation. This guide delves into the intricate world of Rite-Hite Fastrax doors, offering a comprehensive roadmap for everything from installation and setup to operation, maintenance, and troubleshooting. Imagine effortlessly navigating complex tasks with this user-friendly manual as your trusted companion. Whether you’re a seasoned professional or a curious novice, this manual is your key to mastering the art of Fastrax door mastery.

This manual, covering installation, operation, maintenance, and troubleshooting, is meticulously crafted to equip you with the knowledge and confidence needed to handle your Rite-Hite Fastrax door system effectively. Detailed explanations, illustrated diagrams, and practical examples ensure a clear understanding of every aspect, making it an indispensable resource for all users. From initial setup to ongoing maintenance, the manual is your one-stop solution for optimal performance and lasting satisfaction.

Introduction to Rite-Hite Fastrax Door Manual

The Rite-Hite Fastrax door system is a popular choice for businesses and industrial facilities seeking reliable, high-performance overhead doors. This system is designed for durability and efficiency, offering a smooth and quiet operation. This manual provides comprehensive instructions and information to ensure proper installation, maintenance, and operation of your Fastrax door system.This manual is your essential guide to understanding and utilizing your Rite-Hite Fastrax door system.

It covers everything from setup and adjustment to troubleshooting common issues. From initial installation to ongoing maintenance, this document ensures your door operates at peak performance.

Rite-Hite Fastrax Door System Overview

The Rite-Hite Fastrax door system is known for its robust construction and streamlined design. It’s a popular choice for applications requiring high-volume traffic and demanding operational conditions. The system is designed for easy maintenance and long-lasting use. The system’s precision engineering contributes to its exceptional performance.

Typical Applications and Uses

Fastrax doors are commonly found in warehouses, distribution centers, and manufacturing facilities. Their high speed and capacity make them ideal for situations with significant material handling and high-traffic environments. These doors can also be utilized in commercial garages, service bays, and other areas where a high-volume access solution is needed.

Significance of a Proper Manual

A well-structured manual is crucial for understanding the nuances of your Fastrax door system. It Artikels critical procedures, ensuring proper installation and operation to maximize longevity and minimize potential issues. A clear manual empowers users with the knowledge needed for efficient maintenance and problem-solving. It is an invaluable resource, especially for those new to the system.

Rite-Hite Fastrax Door Models

Rite-Hite offers various Fastrax door models, tailored to different needs and applications. The models vary in size, weight capacity, and specific features. This detailed guide provides information about the models available and their characteristics, empowering you to choose the ideal model for your needs.

Model Number Application Key Features
Fastrax 1000 Light-duty applications, commercial garages, and small warehouses. Compact design, basic features, cost-effective solution.
Fastrax 2000 Medium-duty applications, medium-sized warehouses, and distribution centers. Enhanced durability, improved speed, and increased capacity compared to the 1000 series.
Fastrax 3000 Heavy-duty applications, large warehouses, and industrial settings. Maximum load capacity, superior strength, and advanced safety features.

Understanding the Manual’s Structure

This section dives into the organizational heart of the Rite-Hite Fastrax Door Manual, guiding you through its logical structure to ensure effortless navigation. Mastering this structure empowers you to quickly find the information you need, whether troubleshooting a minor issue or understanding the intricacies of installation. Imagine this manual as a meticulously crafted roadmap, taking you from initial setup to advanced maintenance with ease.This manual’s organization is designed with a clear purpose: to provide comprehensive and readily accessible information about your Fastrax door system.

The meticulous arrangement of topics allows you to navigate the complexities of your door system with confidence. Each section and chapter serves a specific function, ultimately providing a thorough understanding of the Fastrax system.

Table of Contents

This comprehensive table of contents is the initial gateway to the manual’s treasure trove of information. It acts as a roadmap, listing every section and chapter, enabling you to quickly locate the specific information you need. It’s akin to a detailed index for a vast library, helping you find the precise chapter or section needed to address your query or concern.

  • Introduction: This section lays the foundation by introducing the Fastrax door system, providing essential background information and defining key terminology.
  • Safety Precautions: This critical section details the essential safety measures and precautions to take when working with the Fastrax door system. These procedures are vital to ensure personal safety and prevent potential hazards.
  • Installation Instructions: This comprehensive section provides step-by-step instructions for installing the Fastrax door system. Illustrations and diagrams are likely included for visual clarity.
  • Operation Procedures: This section covers the procedures for operating the Fastrax door system, including startup, shutdown, and routine operation. It details the correct way to use the system to avoid malfunctions or potential damage.
  • Troubleshooting Guide: This invaluable section lists potential problems and their corresponding solutions. It’s like a problem-solving checklist, guiding you through the diagnosis and resolution of common issues.
  • Maintenance and Care: This section details the routine maintenance and care procedures to ensure the optimal performance and longevity of the Fastrax door system. Regular upkeep is key to a smooth-running system.
  • Specifications and Diagrams: This section provides critical specifications, including dimensions, component details, and diagrams of the Fastrax door system. It serves as a reference guide for essential parameters and parts.

Key Sections and Chapters

The manual’s structure is logically organized to guide you through the Fastrax door system. Each section focuses on a specific aspect, enabling you to easily grasp the interconnectedness of the components. The structure follows a progression from basic principles to advanced maintenance.

Section Contents
Introduction Overview, system components, safety considerations, and preliminary setup instructions.
Installation Detailed step-by-step instructions, diagrams, and essential safety measures.
Operation Startup, shutdown, routine operation, and advanced functions.
Troubleshooting Potential issues, causes, and effective solutions.
Maintenance Routine upkeep, preventative measures, and long-term care.

Index

The index is a crucial navigational tool. It provides a comprehensive listing of terms, concepts, and procedures, allowing for quick access to specific information. Think of it as a detailed alphabetical table of contents, enabling you to find particular procedures or definitions easily. The index is invaluable for locating specific topics quickly.

Installation and Setup Procedures

Getting your Rite-Hite Fastrax door up and running smoothly involves careful planning and precise execution. This section details the installation process, highlighting essential safety precautions and providing a clear step-by-step guide. Proper installation ensures optimal performance and longevity for your new door.The installation of a Rite-Hite Fastrax door requires attention to detail and adherence to the provided instructions.

Thoroughness in this stage prevents potential problems down the line. Following these steps will not only ensure a safe installation but also contribute to a seamless and reliable operation of your new door.

Safety Precautions

Prioritizing safety during installation is paramount. Failure to observe these precautions could result in injury or damage to the door or surrounding structures. Always disconnect the power supply to the door motor before beginning any electrical work. Ensure the work area is clear of obstructions and that adequate lighting is available. Wear appropriate safety gear, such as safety glasses and work gloves, to protect yourself from potential hazards.

Step-by-Step Installation Procedure

A methodical approach is crucial for a successful installation. This detailed procedure Artikels each step, ensuring a smooth and efficient process.

  1. Preparation: Carefully unpack all components and verify that all necessary parts are present. Check the packaging for any damage to the parts and confirm that you have all the required tools.
  2. Marking and Measuring: Accurately mark the mounting locations on the door frame. Precise measurements are essential for proper alignment. Use a level to ensure the door frame is properly aligned. This step is crucial for avoiding misalignment issues later.
  3. Component Assembly: Assemble the door frame components as per the manufacturer’s instructions. This includes connecting hinges, tracks, and other necessary parts. Ensure all connections are tight and secure. Pay close attention to the alignment of the various components.
  4. Door Installation: Carefully place the door into the frame. Ensure proper alignment and secure the door using the appropriate fasteners. This is a critical step in guaranteeing the door functions smoothly and securely.
  5. Electrical Connection: Connect the door motor to the electrical system. Follow the wiring diagram provided with the door. Carefully observe the polarity and ensure all connections are secure and insulated. Double-check the connections to prevent short circuits or electrical hazards.
  6. Testing and Adjustment: Once all components are connected, test the door’s operation. Adjust the door’s alignment and the motor’s settings as needed. Verify that the door opens and closes smoothly and silently. Make sure the door operates within the safety parameters Artikeld in the manual.

Tools Required

The following table lists the necessary tools for the installation process.

Step Number Description Necessary Tools
1 Preparation Screwdrivers, wrenches, level, measuring tape, safety glasses, work gloves
2 Marking and Measuring Measuring tape, level, pencil, marker
3 Component Assembly Screwdrivers, wrenches, pliers
4 Door Installation Screwdrivers, wrenches, level
5 Electrical Connection Screwdrivers, wire strippers, multimeter (optional)
6 Testing and Adjustment Screwdrivers, wrenches, adjustable wrench, level

Connecting and Adjusting Components

Proper connection and adjustment of components are vital for optimal performance. Follow the manufacturer’s instructions carefully for each component. Ensure all connections are tight and secure to prevent issues later on. Double-check that all adjustments are within the recommended parameters to guarantee the door operates efficiently and safely.

Operation and Maintenance Procedures

Your Rite-Hite Fastrax door is a sophisticated piece of equipment designed for reliable and smooth operation. Proper maintenance ensures longevity and optimal performance. This section details the essential steps to keep your door running flawlessly.Maintaining your Fastrax door is like tending to a prized garden; consistent care yields bountiful rewards. A little effort now prevents significant headaches later.

We’ll cover everything from routine checks to troubleshooting common problems.

Operating the Rite-Hite Fastrax Door System

The Fastrax door system operates with a smooth, quiet action. The motor, driven by electricity, precisely controls the door’s movement. Precisely calibrated sensors ensure the door operates safely and efficiently, stopping automatically if an obstruction is detected. A clear understanding of the operational sequence is crucial for proper use.

Routine Maintenance Procedures

Regular maintenance is key to preventing breakdowns and maximizing the lifespan of your Fastrax door. This section Artikels a simple routine for routine upkeep. Following these steps will help maintain optimal performance and avoid costly repairs.

Maintenance Items

Regularly inspect and clean the following components:

  • Door Panels: Inspect for damage, dents, or loose fasteners. A clean door panel enhances the door’s aesthetic appeal and prevents debris buildup.
  • Tracks and Rollers: Check for debris, rust, or wear and tear. Ensure smooth operation and prevent binding or jamming.
  • Sensors: Examine sensor alignment and functionality. Ensure proper operation to avoid accidental malfunctions and ensure safety.
  • Motor and Drive Unit: Inspect for any signs of overheating, unusual noises, or damage. A well-maintained motor is essential for consistent performance.
  • Electrical Connections: Check for any loose wires or corrosion. Ensure that the electrical connections are secure to prevent potential hazards.

Troubleshooting Common Issues

This section details troubleshooting steps for typical Fastrax door problems. A systematic approach to identifying and resolving problems is vital.

  • Door will not open or close: First, check the power supply. If power is on, examine the sensors for obstructions or malfunctions. If the issue persists, contact a qualified technician.
  • Door is slow or jerky: Examine the tracks and rollers for any obstructions. Ensure they are clean and lubricated. Adjustments to the motor’s speed settings might also be required.
  • Door is noisy: Common causes of noise include debris in the tracks, loose components, or a malfunctioning motor. Check and clean all moving parts.

Lubrication and Adjustment Procedures

Regular lubrication and minor adjustments ensure smooth, reliable operation. Follow these steps for proper lubrication and adjustment:

  • Lubrication: Use a high-quality lubricant specifically designed for mechanical components. Apply sparingly to moving parts, such as hinges and rollers, to reduce friction and maintain smooth operation.
  • Adjustment: Refer to the detailed diagrams in the manual. Make minor adjustments to the alignment of the tracks and rollers as needed. Adjustments should be minimal and only made when necessary to maintain balance and correct operation.

Troubleshooting and Common Issues

Rite-hite fastrax door manual

Navigating potential problems with your Rite-Hite Fastrax door is a piece of cake once you understand the common issues and their solutions. This section provides a roadmap to quickly identify and resolve those pesky problems, ensuring smooth operation and a long lifespan for your door. From minor adjustments to more significant repairs, we’ve got you covered.Troubleshooting is an essential part of owning any complex system.

Understanding common problems allows you to address them proactively and avoid escalating minor issues into major headaches. This section offers a structured approach to diagnosing and resolving common Rite-Hite Fastrax door problems, ensuring your door operates reliably and efficiently.

Potential Problems and Solutions

Identifying the root cause of a problem is crucial for effective troubleshooting. Careful observation and methodical checking can pinpoint the source of the issue, whether it’s a minor adjustment or a more significant mechanical problem.

  • Door Won’t Open or Close: This could stem from several factors, including obstructed pathways, faulty sensors, or a malfunctioning motor. Checking for physical obstructions, verifying sensor alignment, and ensuring the motor’s power supply are all vital initial steps. If the issue persists, consult the Rite-Hite support documentation for further guidance.
  • Unstable or Jerky Movement: An unstable or jerky movement of the door often points to misaligned tracks, loose components, or a problem with the drive mechanism. Ensure the tracks are aligned correctly, check for any loose bolts or screws, and carefully inspect the drive mechanism for any visible damage. If the problem persists, consider professional assistance.
  • Excessive Noise During Operation: Unnecessary noise during operation can signal worn-out components, misaligned gears, or problems with the lubrication. Examine the moving parts, ensure the lubrication is adequate, and look for any obvious misalignment or damage. If the issue persists, consult the Rite-Hite support documentation.
  • Frequent Malfunctions: This could be a symptom of a more serious underlying issue. Regular maintenance, such as lubrication and inspection, can prevent these problems. Examine all parts and ensure all components are functioning correctly. If the issue persists, contact Rite-Hite support for diagnosis.

Troubleshooting Table

This table summarizes common Fastrax door issues and their solutions, offering a quick reference guide.

Problem Possible Cause Solution
Door won’t open/close Obstructions, faulty sensors, motor failure Clear obstructions, check sensor alignment, ensure motor power supply, consult support if needed.
Unstable/jerky movement Misaligned tracks, loose components, drive mechanism issues Align tracks, tighten loose components, inspect drive mechanism, consider professional assistance if needed.
Excessive noise Worn components, misaligned gears, insufficient lubrication Examine moving parts, ensure proper lubrication, check for misalignment or damage, consult support if needed.
Frequent malfunctions Underlying mechanical issue, lack of maintenance Perform regular maintenance, inspect all components, contact support for diagnosis.

Contacting Rite-Hite Support

For complex issues that require specialized knowledge or tools, contacting Rite-Hite support is the best approach. They possess the expertise to diagnose intricate problems and provide tailored solutions. Provide them with detailed information about the issue, including model number, symptoms, and any relevant troubleshooting steps you’ve taken. This will help them efficiently identify the root cause and recommend the appropriate course of action.

Support staff are well-equipped to assist you in resolving the problem.

Safety Precautions

Protecting yourself and others is paramount when working with Rite-Hite Fastrax doors. Following these safety precautions will help prevent accidents and ensure a smooth, efficient installation and operation process. Understanding potential hazards and implementing the right safety measures is crucial for a successful project.

Potential Hazards Associated with Fastrax Doors

Fastrax doors, while reliable, present specific hazards that must be addressed. These include the heavy weight of the door components, the potential for entanglement with moving parts, and the risk of electrical shocks if not handled correctly. The presence of sharp edges on components also demands attention to avoid cuts. The precise mechanisms, when not understood and operated correctly, can lead to injuries.

Furthermore, if not handled correctly, materials used during installation or maintenance can cause chemical irritation.

Safety Procedures During Installation

A methodical approach during installation is key to minimizing risks. Always use appropriate lifting equipment for moving heavy components. Ensure the installation area is clear of obstructions and personnel not involved in the task. Electrical connections must be handled by qualified personnel, and all power must be shut off before working on electrical components.

Safety Procedures During Operation

Safe operation of Fastrax doors depends on proper maintenance and regular checks. Keep the operating area clear of obstructions and people. Never attempt to interfere with the door’s operation while it is in motion. Make sure to check the door’s mechanisms regularly for any signs of wear or damage. If there are any issues, contact a qualified technician for repairs.

Safety Guidelines for Workers

Worker safety is paramount. Workers must wear appropriate personal protective equipment (PPE), such as safety glasses, gloves, and sturdy footwear. A designated area should be designated for storage and handling of materials to avoid accidents. Clear communication is essential during the process.

Table Summarizing Potential Hazards and Safety Measures

Potential Hazard Corresponding Safety Measures
Heavy components Use proper lifting equipment, ensure adequate support during handling.
Moving parts Keep hands and other body parts away from moving components; never touch moving parts while the door is operating.
Electrical hazards Disconnect power before working on electrical components; ensure qualified personnel handle electrical connections.
Sharp edges Wear appropriate protective gear; handle components with care.
Entanglement Keep the operating area clear of obstructions and personnel; ensure proper alignment of components before operation.
Chemical hazards Use appropriate protective gear when handling chemicals; ensure proper ventilation during installation and maintenance.

Demonstrating the Importance of Following Safety Procedures

“Safety is not an option; it’s a necessity.”

Prioritizing safety prevents accidents, injuries, and costly downtime. Following the procedures Artikeld in this manual ensures a secure and efficient workflow. This is not just about complying with regulations; it’s about protecting your investment and the well-being of everyone involved. Investing in safety is an investment in the long-term success of your project.

Parts and Components

Unlocking the secrets of your Rite-Hite Fastrax door system begins with understanding its intricate parts. Each component plays a crucial role in the smooth operation and longevity of your door. From the powerful motor to the delicate sensors, every piece is meticulously engineered to ensure reliable performance. Knowing these parts and their functions is key to preventative maintenance and timely repairs.

Identifying Critical Components

A comprehensive understanding of the Rite-Hite Fastrax door system’s critical components is vital for proper operation and maintenance. This involves identifying every part and understanding its specific function. This knowledge empowers you to address potential issues proactively. A well-maintained system translates to a longer lifespan and fewer unexpected breakdowns.

Door Hardware Mechanisms, Rite-hite fastrax door manual

The heart of the Rite-Hite Fastrax system lies in its sophisticated hardware mechanisms. These mechanisms work in concert to ensure precise and reliable operation. Understanding their interplay is crucial for both preventative maintenance and effective troubleshooting. Proper operation depends on the smooth and accurate performance of these integrated parts.

Part Name Part Number Function
Motor Assembly [Specific Part Number] Powers the door’s movement, providing the necessary force for opening and closing.
Track System [Specific Part Number] Provides a guided path for the door’s movement, ensuring smooth and stable operation.
Sensors [Specific Part Number] Detect the presence of obstacles or objects in the door’s path, triggering safety mechanisms to prevent accidents.
Limit Switches [Specific Part Number] Define the door’s operating range, ensuring the door doesn’t move beyond its designated limits.
Locking Mechanism [Specific Part Number] Secures the door in its closed position, providing a robust barrier against unauthorized access.
Spring System [Specific Part Number] Provides the counterbalance for the door, enabling effortless operation and reducing stress on the motor.
Hinges [Specific Part Number] Support the door’s weight and facilitate its smooth rotation during opening and closing.
Handles and Accessories [Specific Part Number] Provide the interface for users to interact with the door, facilitating opening and closing.

Importance of Proper Part Replacement

Replacing parts according to the manufacturer’s specifications is critical for maintaining the Rite-Hite Fastrax door’s performance and safety. Using incorrect parts or failing to adhere to the specified procedures can lead to reduced functionality, safety hazards, and premature component failure. By adhering to the recommended replacement schedules and using authentic parts, you ensure optimal performance and a long service life for your system.

It’s akin to using the correct oil for your car – the right part ensures the entire system works harmoniously.

Diagrams and Illustrations

Unlocking the secrets of your Rite-Hite Fastrax door lies within these visual guides. Diagrams and illustrations are your friendly visual companions, simplifying complex mechanisms and making the installation and maintenance processes a breeze. Imagine navigating a maze; diagrams and illustrations are your trusty maps, showing you the quickest and safest paths.Visual aids are more than just pretty pictures; they’re powerful tools that bridge the gap between the abstract and the tangible.

They offer a clear and concise representation of the Fastrax door’s components, their interrelationships, and the correct procedures for installation, operation, and maintenance. These visual aids are your indispensable guides to success, whether you’re a seasoned installer or a curious homeowner.

Understanding the Visual Language

Diagrams and illustrations in this manual are meticulously crafted to provide clear, unambiguous representations of the Fastrax door system. Each symbol, line, and arrow conveys specific information. For instance, thicker lines might represent structural components, while thinner lines might depict connections or pathways. Consistent use of symbols and colors helps readers easily distinguish between different parts and processes.

A keen eye for detail will unlock the full potential of these visual tools.

Types of Diagrams and Their Purposes

This manual utilizes various diagrams, each designed for a specific purpose. Understanding their individual functions is key to mastering the Fastrax door.

  • Exploded Views: These diagrams showcase the door’s components in a disassembled state, highlighting each part and its relation to the whole. This is invaluable for understanding the assembly process and identifying parts.
  • Installation Diagrams: These diagrams illustrate the precise steps required for installing the Fastrax door. They provide a visual roadmap, showing the correct placement of each component and the sequence of operations. This is especially crucial during installation and ensures that you follow the right order.
  • Operational Diagrams: These diagrams depict the functioning of the door’s mechanisms in action. They highlight the movement of parts, showing how they interact to achieve the desired operation. These diagrams will be crucial for understanding how the Fastrax door operates, ensuring optimal functionality.
  • Maintenance Diagrams: These diagrams Artikel the steps involved in maintaining the Fastrax door. They depict access points, potential problems, and the required procedures to keep the door in top condition. These are essential for troubleshooting and resolving common issues, preventing future problems.

Comparing and Contrasting Diagrams

A table summarizing the key features and usefulness of different diagrams can be highly beneficial.

Diagram Type Purpose Usefulness
Exploded View Showcasing components in disassembled form Excellent for understanding parts and assembly
Installation Diagram Illustrating step-by-step installation Essential for correct assembly and minimizing errors
Operational Diagram Demonstrating mechanism functioning Critical for understanding how the door operates
Maintenance Diagram Outlining maintenance procedures Helpful for troubleshooting and preventing issues

By carefully examining these diagrams, users can gain a comprehensive understanding of the Fastrax door system and effectively navigate installation, operation, and maintenance tasks.

Glossary of Terms

Unlocking the secrets of your Rite-Hite Fastrax door system starts with understanding its specialized language. This glossary serves as your personalized translator, decoding the technical jargon and making the manual a friendly guide. Prepare to embark on a journey of understanding, where every term becomes a key to mastering your door’s operation.This section provides a comprehensive list of terms frequently encountered in the Rite-Hite Fastrax door manual.

Each definition is presented clearly and concisely, accompanied by examples to solidify your grasp of the concepts. This empowers you to navigate the manual with confidence, making installation, operation, and maintenance straightforward.

Technical Terminology

This section defines critical technical terms and concepts, essential for understanding the Rite-Hite Fastrax door system.

  • Actuator: The motorized component responsible for opening and closing the door. It converts electrical energy into mechanical motion, driving the door’s movement. For instance, the manual might discuss adjusting the actuator’s speed settings.
  • Backlash: The slight play or looseness in the mechanical components, which can affect the door’s smooth operation. The manual will likely discuss methods for reducing backlash for improved accuracy.
  • Bearing: A component that reduces friction and allows smooth rotation or movement of parts. The Fastrax system likely uses various bearings for optimal operation, such as ball bearings or roller bearings, depending on the specific model.
  • Encoder: A device that measures the position and speed of the actuator’s movement. This is critical for precise door positioning and control, as detailed in the manual’s installation procedures.
  • Failsafe Mechanisms: Safety features designed to prevent the door from malfunctioning and causing harm. The manual will likely Artikel the procedures to test and maintain these safety features.
  • Force Sensor: A device that measures the amount of force exerted on the door or components. The manual might use this to explain the calibration of the door’s closing force, ensuring it is neither too weak nor too strong.

Operational Definitions

These terms describe specific functions and procedures.

  • Calibration: Adjusting the system’s settings to ensure accurate and reliable operation. This might include aligning the encoder readings with the physical position of the door.
  • Maintenance Schedule: A recommended routine for checking and servicing the door to maintain its optimal performance. The manual will likely Artikel a schedule for lubrication and other preventive maintenance tasks.
  • Troubleshooting: Identifying and resolving issues with the door’s operation. The manual will probably include a table with common issues and their corresponding solutions.
  • Programming: Inputting instructions to control the door’s functionality. The manual will most likely detail the process of programming the door to respond to specific signals.

System Components

This section details the essential parts of the Rite-Hite Fastrax door system.

  • Control Panel: The panel where you input commands and monitor the door’s status. The manual will describe the layout and function of the control panel buttons.
  • Safety Sensors: These sensors detect obstacles and prevent the door from closing. The manual will probably explain how to align these sensors for maximum protection.
  • Wiring Harness: The electrical connection that connects the various components of the system. The manual will likely detail the specific wiring procedures and diagrams to prevent any electrical hazards.

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