When adding fluid to a system, use the type specified in the aircraft manufacturers maintenance manual or on the instruction plate affixed to the reservoir or unit. Pneumatic systems are used for relatively lower forces, faster motion, and where stiffness isnt required. Were confident that well be able to help if things go wrong, but wed rather help you get things right in the first place. Preventive maintenance is especially important with hydraulic products.
Plant engineering 12 steps to troubleshooting pneumatic systems. Maintenance of hydraulic systems linkedin slideshare. Prestart if the hydraulic system is down as a result of a major component failure. A technicians and engineers guide provides an introduction to the components and operation of a hydraulic or pneumatic system. Common preventive maintenance practices can actually do more harm than good. The first half of the pneumatic and hydraulic maintenance textbook focuses on pneumatics. Mar 10, 2004 12 steps to troubleshooting pneumatic systems troubleshooting a pneumatic system has been considered an art, a science, or just hitormiss luck. If your trueline pneumatic cylinder is not installed immediately, follow the procedure below for proper storage. Operations and maintenance manual, you can maximize the productivity, service life, and value of your cat machines.
In the minds of maintenance personnel, production managers, and plant managers, the word troubleshooting conjures up images of hours of downtime and lost production. And, the main difference between these two is, hydraulic systems use liquids like water and oil to transmit power. The three types of pressures used in a pneumatic system. Pneumaticshydraulics holistic and turnkey training solutions. Introduction to pneumatics module objectives after the completion of this module, the student will be able to. In hydraulics and pneumatics, hydraulics is liquid and pneumatics is gas. Webtec recently introduced an introduction to practical hydraulic system maintenance. Identify the main components of the pneumatic work station tp 101. The high pressures and temperatures associated with hydraulics make hose and fitting maintenance as well as selection critical. It begins with pressure, force, work, and energy as well as system components. Most pneumatic circuits run at low power usually around 2 to 3 horsepower.
Pneumatic system everyday maintenance epneumatic blog. Pneumatic systems are used in controlling train doors, automatic production lines, mechanical clamps, etc fig. Maintenance of hydraulic systems most companies spend a. Pneumatic systems 1 pneumatic systems a pneumatic system is a system that uses compressed air to transmit and control energy. This unit may be assessed on the job, off the job or through a combination of both. Pressure regulator regulates the required level of pressure in the hydraulic fluid. Ibrahim naimi symbols and standards in pneumatics the development of pneumatic systems is assisted by a uniform approach to the representation of thl dh i ihe elements and the circuits. Jan 25, 20 preventive maintenance allows a maintenance department to controla hydraulic system rather than the system controlling the maintenance department. The installation is complex and the maintenance cost is high.
Hydraulic systems may use a variety of fluids ranging from water with or without additives to hightemperature fireresistant types. Possibility of leakage is less in hydraulic system as compared to that in pneumatic system. The relationship of air pressure, volume and temperature. In hydraulics, liquids are relatively incompressible. Principles, operation and maintenance training seminar provides participants with a greater working expertise and understanding of hydraulic power systems. Hydraulic systems employ high density incompressible fluid. Scheduled maintenance should include inspection of rod seals and wipers for damage as a means not only of preventing leaks, but to prevent contamination of hydraulic fluid. The basic foundation to perform proper maintenance on a hydraulic system has two areas of concern. To control the system, only on and off are used and the system consists only of standard cylinders and other components, making it simpler than hydraulics.
Hydraulic systems are used for high force and where stiffness in position is necessary. Industrial applications include automation, logic and sequence control, holding fixtures, and highpower motion. Lecture 1 introduction to hydraulics and pneumatics. The condition of a machines hydraulic system can make a big difference. Pdf hydraulics and pneumatics download ebook for free. Pneumatic preventive maintenance is very similar to hydraulic maintenance although obviously there is no hydraulic oil to check. This textbook continues with an overview of pneumatic diagrams, system components, maintenance, and troubleshooting. Aircraft pneumatic system components are air compressors, relief valves, control. Ensure all pressure is relieved or blocked from the hydraulic and high pressure circuits before proceeding. One of the major factors behind the failure of hydraulic systems is contamination. If done correctly, the risk of injury andor excessive, costly downtime decreases.
Starting with a problem of excessive oil leakage, a large automotive engine plant is systematically revitalizing its hydraulically actuated production machine circuits to outlaw oil waste, maintain designed system pressures and machine efficiencies, and to simplify systematic maintenance. In order to validate your preventive maintenance procedures you must have a goodunderstanding and knowledge of best maintenance practices for hydraulic systems. Chapter 9 hydraulic and pneumatic systems seabee magazine. This book discusses the main advantages and disadvantages of pneumatic or hydraulic systems. Identify operational characteristics, component functions, and maintenance procedures of a hydraulic. The type of unit used to provide pressurized air for pneumatic systems is determined by the systems air pressure requirements. The pneumatic troubleshooting training system is the first product to offer a realistic troubleshooting experience for learners, because faults can be inserted throughout the system, including the pneumatic, mechanical, and electrical components. Preventive maintenance for hydraulic systems mac hydraulics. May 15, 2014 reduce failure of hydraulic systems with preventive maintenance thursday, may 15, 2014 by hydraulics team the first line of defense in reducing failure of a hydraulic system is to incorporate contamination measurement and control protocols as an integral element of your preventive maintenance pm program. Provides a flow path for the pump volume back to tank. Difference between pneumatics and hydraulics systems bright. It is designed to help the trainee master the knpwledge and skills necessary to become an aviation airframe mechanic. Thbl dhe symbols used for the individual elements must display the. Objectives when you have completed this chapter, you will be able to do the following.
Pneumatic system troubleshooting maintenance technician. Hydraulic operations are also almost 100 percent efficient, with only negligible loss due to fluid friction. The seminar delivers an interactive training experience designed to help participants understand the various components found in a typical hydraulic system and how these components function and interact with. Reduce failure of hydraulic systems with preventive. The operation of landing gear, flaps, flight control surfaces, and brakes is largely accomplished with hydraulic power systems. The aviation airframe maintenance technician must be able to demonstrate his ability to troubleshoot, service, and repair aircraft fuel. Drain and clean the reservoir, to ensure that it is free from metallic debris and other contamination. Pneumatic systems require low maintenance and have long operating lives. Routine maintenance on your hydraulic system can alleviate performance problems and downtime, prolong hydraulic component life and reduce operating costs. Preventive maintenance for hydraulic systems is critical for hydraulic equipment, whether it is an industrial system running in an enclosed plant or an integral part of a powerful hydraulic excavator. If the focus was shifted to the prevention of system or component failures, less time and money could be spent on troubleshooting. Take care to protect the cylinders from both corrosion and external damage. Preventive maintenance for hydraulic systems by the best.
Today, the meaning has been expanded to include the physical behavior of all liquids, including hydraulic fluid. In pneumatic systems, regular maintenance of all the components is of utmost importance so as to ensure that the system works at its complete potential. Aug 29, 2015 maintenance of hydraulic systems most companies spend a great deal of money training their maintenance personnel so that they can troubleshoot and correct failures of a hydraulic system. Troubleshooting and preventive maintenance of hydraulic. The fluids may be typical petroleum based mineral oils. Organized into eight chapters, this book begins with an overview of industrial prime movers. Pneumatic control valves service and maintenance procedures 10181402 82008rev 24 3 severe injury can result if the machine is not properly locked out. Hydraulic fluid hydraulic system liquids are used primarily to transmit and distribute forces to various units to be actuated.
Troubleshooting and preventive maintenance of hydraulic systems. Identify operational characteristics, component functions, and maintenance procedures of a hydraulic system. Piping system carries the hydraulic oil from one place to another. Hydraulic systems in aircraft provide a means for the operation of aircraft components. Mem18018c maintain pneumatic system components introduction this resource is designed to help the student gain the knowledge and skills required to achieve the competency mem18018c maintain pneumatic system components. The word hydraulics is based on the greek word for water and originally meant the study of the physical behavior of water at rest and in motion. Pneumatic fuses also protect a pneumatic system against major leaks. Observe electrical lockouttagout procedures before proceeding.
Aircraft hydraulic systems the word hydraulics is based on the greek word for water and originally meant the study of the physical behavior of water at rest and in motion. These systems perform well in hot environment conditions. Basic components and its functions of a hydraulic system. Lastly the working fluid of the pneumatic system absorbs excessive force, leading to less frequent damage to equipment. If not properly taken care of, frequent damages and breakdowns are bound to happen, and this will in turn reduce the life of the equipment and will incur additional costs.
Aug 05, 2015 if oil is leaking out round the neck seal on the extend stroke, dirt is being drawn into the system on the return stroke and a minor leak can soon tum into a major system failure. The basic function of a hydraulic pump is to take fluid that is provided at the inlet and discharge it through the outlet into a hydraulic system. System carehydraulic fluid lines are the arteries of the hydraulic system. The powerful impact of preventive maintenance hydraulics. Aircraft pneumatic systems are used for brakes, opening and closing doors, driving hydraulic pumps, alternators, starters, water injection pumps, etc. The liquid in a hydraulic system is used to convey energy and produce the required force at the actuators. The various end devices in a pneumatic system are linked to the air receiver by pipes, tubes or hoses. Lack of maintenance of hydraulic systems is the leading cause of component and system failure yet most maintenance personnel dont understand proper maintenance techniques of a hydraulic system.
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