While these two terms are sometimes used interchangeably, jacking and ramming are two different processes. In the tidal marshes through which the railroad passes, the ordinary timber backstops could not be employed. Preventing Erosion of Soil Around the Jacked Pipe. Here you can change your Privacy preferences. The first section of pipe was equipped with a steel cutting edge of -inch greater diameter than the section for its entire circumference; and an additional steel extension projecting 20 inches ahead of this section for the upper one-third of its circumference. RR., Buffalo, New York, covering the pressures required to jack 69 feet of 96-inch reinforced concrete pipe, with nine-inch shell thickness, under four mainline tracks of the Delaware, Lackawanna & Western Railroad at East Fifth Street in Elmira, New York, is shown in Fig. These points are known as jack points, and most aircraft feature jack pads at these locations. An aircraft hangar is the best environment for aircraft jack operations when possible. For the jacking process to be successful, two main components must be present: The first, and probably most essential element of jacking is the reaction mechanism. There are probably as many different designs of jacking frames and backstops as there are jacking projects. A means of evenly distributing the jacking force to the installed pipes. Once the jacking is started keep it going. Lifting and Jacking the Vehicle - RepairProcedures.com Dented legs can quickly lead to the jack's collapse. Aircraft jacking procedures Flashcards | Quizlet the process is continued until there is room for, another piece of pipe. According to Occupational Safety and Health Administration (OSHA) data, jacking, lifting and supporting tractors and trailers has resulted in more fatal accidents than any other aspect of truck tire and wheel service. When you make the preliminary borings prior to jacking, examine particularly for the presence or absence of groundwater. The aviation industry is heavily reliant on the weather. The only thing you can do to minimize this wear is to, occasionally, remove both wheels. Look over the paint condition. Click here to upgrade to a newer version of Internet Explorer or Microsoft Edge. For instance, a leaking or damaged jack should never be used. To begin jacking the aircraft, extend the jacks until they are contacting the jack pads. Never attempt to lift a vehicle if the weight, type of load, slope or ground surface stability creates a hazardous situation. The manufacturer's maintenance manual will provide this location information for each aircraft type. Inspecting and testing equipment before you use jacks is a full-proof way to ensure every operation is safe. Some people like mechanical jacks and I know that some mechanical jacks function very well. Since the seal is actually supporting all the weight, when it fails, the load will crash to the ground instantly. 1. And they have been known to happen to experienced aircraft mechanics, and to homebuilders as well . Operation procedures of hydraulic jack - CreaLifting ***Jacking Procedure-Raising. WHAT KIND OF JACK? Each hole is about two inches and diameter, and the number drilled depends upon the size of the mudjacking project. And the limit on the large size is determined somewhat by the length of line to be jacked because the skin friction and the weight in the larger sizes naturally increase the force necessary to push the line forward. This will give you the nose wheel clearance you need. Hydraulic jack uses a plunger or a hydraulic cylinder as a rigid jacking member. I am often asked, 'What is the largest size concrete pipe that can be installed by the jacking process and what is the smallest size?' Make complete preparations at the start so that when jacking commences you can keep on going until completion. This could save your life. Below are some guidelines to use when selecting the lift and support points: Step 7 Center the jack saddle under the axle and then use the jack to lift the axle. It is usually more economical to start the pushing operation in an open trench and therefore the site should be investigated carefully to determine where the jacking operation should start. As the manufacturer of your own homebuilt, it is your responsibility to provide safe jacking points for your aircraft. Jacking of pipe 30-inch to 108-inch in diameter under railroads and congested streets and highways is now a common practice in the United States and Canada, thus eliminating interference with traffic and the costly maintenance which often results from trench settlement. A good source for all kinds of jacks is Harbor Freight Tools of California. A wooden mat should be placed between the jacks and the jacking weight, and the top position must be solid. Head on over to Tronair today, and take a look at our entire selection of aircraft jacks, towbars, stabilizer stands and more for your maintenance procedures. Certain aircraft also feature a fourth point that is used for further stabilization. The jacking goes forward continuously until the effective limit of the jacks is reached. Blocking is then placed and jacking is continued until additional blocking is necessary. Here at Tronair, we offer a wide variety of aircraft jacks for sale to help in your jacking operations. 8. The backstays may be constructed either of concrete or of timbers with the bottoms set in the ground and the tops supported by diagonals reacting against embedded anchorages. Groundwater in gravel causes no trouble as it can flow back through the pipe and be pumped from the pit. McCarthy Tire is the 5th largest independent commercial tire dealer and one of the top 50 retail tire dealers in the country. On some projects, it may be easier to dig a pit at an intermediate point and jack the pipe in both directions from the pit. 1-10. Before technicians use jacks to perform routine maintenance or aircraft repairs, they should always read over the basic rules of operation to ensure their safety and the safety of the aircraft. What is juice jacking? | Definition from TechTarget Never try to jack a concrete pipeline with jacks that are not strong enough. For average conditions backstops such as shown in Figs. 1-9. The lead pipe was fitted with a steel cutting edge 5/8-inch in thickness and 18-inch in width and bolted to the groove end of the pipe so that 6 inches extended ahead as a shield. This method simplifies the problem of the reaction blocks and decreases the total length of pipe to be jacked in any one direction. Unequal distribution of the jacking force can result in stress concentrations, which can damage the pipe. After the jacking is started, it should be kept going insofar as possible. In performing a retraction test, it will be necessary to weigh down the tail of the aircraft to get the nose wheel off the ground. Normally, these are the wing tiedown points which double as jack points. Thoroughly check the hydraulic system for leaks. In wet areas, it may be necessary to drain the jacking site sometimes by the use of good points. His is not the first airplane to have fallen off its jack(s). JACKING PROCEDURES Flashcards | Quizlet We're always happy to help. Katie Hobbs of . Never allow the jack or jack stands to lift or contact the vehicle at an angle. By clicking sign up, you agree to receive emails from Trenchlesspedia and agree to our Terms of Use & Privacy Policy. Before jacking an aircraft, technicians should survey the areas under and around the aircraft to determine if any hazards to the aircraft or personnel are evident. If the safety bolts are damaged, it should not be used. 3. If it is a homebuilt, you will have to, in the absence of any guidance, decide which method is safe and suitable for your aircraft. 2. In the course of fifteen years, I ran into almost every kind of soil, including fill. of running, it may be necessary to sheet the heading with timbers caulked with straw, removing the running sand little at a time while the shield is moved forward, and jacked accordingly. 1 Place Safety Barriers in position around the aircraft. Step 3 Chock one set of wheels on both sides of a tire on an axle that will remain on the ground. When several jacks jack up a heavy object at the same time, there should be someone command to keep the lifting up and down simultaneously, to prevent uneven force and accident occurs. Lubricate the threaded ram with DoAll, RPM, LPS or an equivalent water repellant that is Buna N compatible. A concrete base in the jacking pit will usually pay for itself as it allows for better working conditions, constant grade and the best drainage situation. The general procedure for raising the complete aircraft on jacks is as follows: 1 Place Safety Barriers in position around the aircraft. The letter starts out . 4. PDF Keystone RV Company - National Highway Traffic Safety Administration "Im in need of jacking technique and hardware. Jacking Procedures Flashcards | Quizlet McCarthy Tire Service Acquired Roli Retreads Inc. Summer Road Trips: 6 Tips to Get Your Vehicle Ready, Leonard Potts Promoted to Regional Operations Manager, 6 Ways to Maintain Your Vehicle on a Budget. 4. Only use attachments and adapters supplied by the jack or jack stand manufacturer. . . (a) Measurement is found to be in excess of: Wheel Diameter up to: Lash: 16 . So now that you know the correct equipment to use, how sure are you that you are following the correct procedures when you jack up a vehicle? The advantages of the meth dare: (b) No interruption of street, highway or railway traffic. Each leg has three chords. This act is typically done by mechanical means using several different devices. 10. Perform maintenance require lifting (jacking)- for example : change tire,brake unit. If its a bulk/tanker trailer, the load will probably shift on a sloping surface, and if the slope is greater than 5 degrees, the jacks proof load which is 150 percent of its rated capacity- may not apply. Were always available and ready to help you find all the parts and equipment you need, 24/7-365. The following should be included in your Tronair Tripod Jack 90-day maintenance and inspection checklist: 12-month maintenance and inspection should be recorded within a datasheet. On jacks of this type, the collet should be kept within two threads of the lift tube cylinder while raising, and screwed down firmly to the cylinder once jacking is completed. Service manuals, electrical schematics and bulletins for 1995 to current GM vehicles. If the sections of the pipe are moved along the ground by pushing with bulldozer r tractors, great care should be taken not to damage the pipe. Guide timbers to hold and guide the pipe are carefully installed to line and grade in the approach trench. For concrete pipe 30-inch to 42-inch diameter in the ordinary clay or sand soils, two 100-ton hydraulic jacks are recommended. You have to disassemble the wheel and turn the tire around on the rim before reinstalling it in order to change the wear pattern. It is also advisable to switch the wheels to the opposite gear legs for more equal tire wear. They generally have different height adapters to accommodate both tractors and trailers. If equipped, check the air pump, referencing the air pump service manual. Don't forget that the backstop takes just as much push and a little more than the pipeline. Aircraft Service/Maintenance Manuals When lights are used to regulate taxiing, what does a flashing white light mean? Hydraulic jacks, usually referred to as bottle jacks, are very portable and come in various heights to accommodate almost every type of vehicle. Proper Procedures for Using an Aircraft Towbar. Pipelines while being jacked and after they are installed are not subject to unbalanced stresses. One is a small 2 ton hydraulic jack costing about $12, and the other, a long ram 3 ton hydraulic jack priced as little as $39.99. Forklift Safety: 8 Tips to Keep You Safe on the Job, Lock Out/Tag Out: Control Hazardous Energy. High temperatures and extreme environmental conditions are often the norm for commercial and military aircraft HOW AN AIRPORT GROUND CREW CAN PREPARE FOR SERIOUS STORMS. In my case, I think it is because I tend to look out the left side of the airplane more often and I therefore seem to touch down on that wheel sooner than on the other. Check out your favorite auto parts place, trailer and camper sales outlets, and dont forget Harbor Freight Tools. They may be constructed of 10-inch x 10-inch timbers with steel angles placed on the inner edges. Correct alignment of the pipe guide frame, jacks and backstops. IN SUMMARY The thrust wall is essentially a concrete wall that braces the rig during jacking. Move the vehicle instead. Annual load tests and certifications need to be conducted on Tronair jacks regularly.