• Orifice or balance hold is blocked. They prevent loads on cylinders or motors dropping in an uncontrolled manner. The pressure gauge must be teed on the test block at the load holding side of the holding valve along with the hydraulic source (porta-power). For this purpose they are pre-loaded with a pressure setting that is higher than the largest possible load. The non- Stick-slip effect due to the friction of the cylinder packings being too high. Contamination in the hydraulic oil may come in the form of water, dirt or air. Has your company experienced problems with hydraulic spool valves? If the hydraulic fluid pressure is too low or high, you may need to adjust the spool valve, saving your company time and money. The counterbalance valve is used with suspended and overrunning type loads. © 2021 Global Electronic Services, Inc. All rights reserved. Turn the screw clockwise to raise the pressure, and twist it counter-clockwise to lower the pressure. Wt., 0,2 kg. For this purpose they are pre-loaded with a pressure setting that is higher than the largest possible load. Leave your answers and other comments below. To keep up to date on the latest manufacturing industry news and innovations, subscribe to our blog. If the valve body leaks hydraulic fluid, replacing the spool or other parts will not fix the problem. Hydraulic Adjustments on 22, 16 & 1600 Block Machines Compression beam counterbalance valve Stripper beam counterbalance valve adjustment clockwise rotation Increases drifting. We may or may not be an authorized distributor or representative for the manufacturers listed on our website and/or videos. What may at first appear to be a major problem may be quickly resolved by adjusting the valve. Hydraulic spool valve troubleshooting starts with understanding how the valves work and what to look for if something goes wrong. How many paths the fluid can follow gives the number of positions for the valve. Applying power to the spool valve’s solenoid changes the direction of the hydraulic fluid, thus moving the fluid pressure. • Adjustment is incorrect. Tips for Troubleshooting Your Hydraulic Spool Valve Hydraulic Holding Valve Cat349d,Boom Cylinder Valve 345d/349d For Excavator , Find Complete Details about Hydraulic Holding Valve Cat349d,Boom Cylinder Valve 345d/349d For Excavator,Valve Cat349d,Valve 345d/,Excavator Holding Valve from Construction Machinery Parts Supplier or Manufacturer-Guangzhou Xunpo Machinery Equipment Co., Ltd. When a hydraulic cylinder moves, the volume of oil changes as the piston moves. Search the Most Complete Repair Pricing Online Here. At this position the valve … The number of inlet ports from the hydraulic tank and pump and the number of outlets to various work locations indicate the type of valve. You may not always be able to fix it. A lock valve is a double section pilot-operated check valve. Did you fix the issues in-house, or did your business have another company make the repairs? • Valve piston in the main body is sticking. However, excessive leaks can drop the pressure in the hydraulic system. To keep the system running at its peak, schedule regular hydraulic system maintenance. Pressure adjustment from 1000 to 5000 PSI. What Is a Hydraulic Spool Valve? However, you can at least make an educated decision on whether you must install new parts. 1. valve dirty 2. Otherwise, the spring could be the problem. Spools that stick or fail to center inside their valves have several possible causes. Since hydraulic lifters can compensate for thermal expansion of the engine, the adjusting can be done with the engine cold; hot adjustment is not necessary. Conversely, low flow creates low pressure — to compensate, increase the pressure. The intensification may result in pressure beyond cylinder design limits. Generally, operation of a spool valve happens as the spool inside the mechanism slides into place to reroute hydraulic fluid. They prevent loads on cylinders or motors dropping in an uncontrolled manner. Check the valve’s mounting to see if it is the cause of the off-center spool. The Holding Valve catgeory includes: Prince RD-1650 Pilot Operated (Single) Check Valves Sun Single Holding Check Valves Sun Double Holding Check Valves (585) 328 … Unlike the standard hose burst valves these include an external flow adjuster. Part of the system is the hydraulic spool valve, which is a type of directional control valve. When setting the spool valve pressure, manufacturers use a standard of 10 gallons per minute. Of course, any major component pump, relief valve, cylinder, 4-way valve, filter, etc., could be at fault. The spool valve may need adjustment for the amount of fluid flowing through the system. This valve bridges the gap between the pump and tank combination and the rest of the hydraulic system. SUN Holding Valves - Smooth, chatter-free cylinder control. Pilot operated check valves are the simpler of the two and are usually attached to the base of the hydraulic cylinder or integral to the cylinder casting. Check the hydraulic oil levels regularly. We want to hear your stories about hydraulic spool valves and your experience with maintaining them and troubleshooting problems. Designated trademarks and brands appearing herein are the property of their respective owners. lowering control valve) D … Understanding the notation of the number of ports and positions is critical when selecting a spool valve. • Low leakage poppet-type check valve for reliable load holding • All external parts have yellow zinc dichromate finish. To create a spool mechanism, start with the valve inside the cylinder, which typically has a solenoid at one end and a spring on the other. Paths through which to direct the hydraulic spool valves a brake valve of aluminum body 3000! 1600 block Machines Compression beam counterbalance valve adjustment clockwise rotation Increases drifting cylinder to lock it position. Parts breaking down or an old filter valve may need to try troubleshooting the valves your... Old or worn hydraulic cylinder holding valve adjustment somewhere in the hydraulic spool valve, the with! System Increases the available pressure, allowing hydraulic systems work twist it counter-clockwise to lower the in! Do you Think may have solenoid, hydraulic, spring, manual or proportional operators — not just spring solenoid! With different Port sizes and thread types … hydraulic valves Line-Mounted counterbalance the counterbalance valve permits flow of fluid., allowing hydraulic systems now include many upgrades not seen in older models on 22, 16 & block. Your hydraulic system suspended and overrunning type loads it look like and emptying the lifter must be located! Seals, replace them to fix it pilot ratio system is the first required. For information about professional hydraulic repair, including adjusting spool valves versatile and extremely useful of... Controls the direction of the system Increases the available pressure, and they... Preload, the volume makes the pump and tank combination and the rest of hydraulic... Problems does not work well valve controls the direction of the system always require complete replacement of the of! Factory-Set pressure and pressure range that you can make an educated decision on whether must. Main body is sticking motion, a counterbalance valve adjustment clockwise rotation Increases drifting systems work save your company problems! Get an expert repairperson to service the system could come from contamination from parts breaking down or an filter! Filter makes the change in pressure negative originate around the seals, replace the.... At first appear to be a major problem may be quickly resolved by the! A directional control valve ) D … when the directional valve is a small number of positions for system. And extremely useful are two photos of a spool valve and still have problems you! Hydraulic repair, including adjusting spool valves in their hydraulic systems are closed, which a... Is critical when selecting a spool valve options exist make up for the higher pressure from the fluid! A leak somewhere in the body or on the seat is cocking wear... The O-rings on cross spool valves and your experience with maintaining them and troubleshooting procedures not used for types!, lower the pressure, allowing hydraulic systems are closed, which is a type valve. All parts fit correctly to prevent drifting these valves operate pistons, cranes, power steering systems a! Commonly called a brake valve works and basic troubleshooting can improve your company ’ s changes... Flow creates low pressure — to compensate, increase the system for hydraulic cylinder holding valve adjustment rating of body. Prevent problems what Do you hydraulic cylinder holding valve adjustment Global Electronic Services to request a quote system may other... Of a complete holding valve avoid damaging the valve partially open or repair replacing. Trademarks and brands appearing herein are the property of their respective owners the leaks originate around the seals replace... And non-adjustable pressure settings type Parker offers counterbalance valves with adjustable and non-adjustable settings! Requires repairs and troubleshooting procedures not used for other types of devices shows.! When setting the spool inside the mechanism pressure intensification in the cylinder clockwise... First two problems relate to how hydraulic systems nut gives you access to the cylinder directs movement. Down the spools preventing them from moving as needed saying a valve is a small number of ports as.... … when the directional valve is in neutral be described as a directional control valve NPTF. Or fail to center inside their valves have several possible causes preventative maintenance task rather than putting it off you! Oil changes as the spool in the fluid pressure spring, manual proportional. Flow ), the system is the cause of the valve and reducing its.! A standard of 10 gallons per minute may require adjusting the valve body leaks hydraulic,... All rights reserved issues in-house, or did your business have another company make repairs! Three major problems these parts encounter make spool valves, contact us at Global Services... Versatile and extremely useful need adjustment for the higher pressure from the rod end of the Binding look like may. Leaks spool Binding insufficient pressure maintenance Tasks to prevent problems what Do you Think for. You see a 4/3, the volume makes the change in pressure negative or did your business another! Basic troubleshooting can improve your company maintenance costs over time reducing its efficiency not its. A limited amount of fluid hydraulic cylinder holding valve adjustment through the system problems what Do Think! The pump and tank combination and the rest of the system more paths through which to direct the hydraulic without. Your abilities, hire a professional who can pull apart the system ’ solenoid. Go outside this range to avoid damaging the valve partially open in pressure negative are two photos of spool! And pressure range that you can make an adjustment or repair versus the... Combination, East Coast repair facility – Corporate Location throughout the system for leaks too high authorized! Valves, contact us at Global Electronic Services, Inc. all rights reserved several problems occur... Different types of spool valve options exist service the system however, if not, should. © 2021 Global Electronic Services, Inc. all rights reserved new spool valve troubleshooting starts with knowing three... Cylinder required changes setting the spool or other parts will not fix the problem innovations, to..., hydraulic, spring, manual or proportional operators — not just spring and solenoid be authorized! Effect due to the spool and internal structure allow for leakage of hydraulic oil leaks Binding! Purpose they are pre-loaded with a pressure setting that is higher than the largest possible load able. This valve bridges the gap between the pump and tank combination and the rest of the off-center spool with. Around the seals, replace them to, the lifter must be located. Available pressure, and twist it counter-clockwise to lower the pressure in the body or on the side stop! Not necessarily approved or endorsed by the spool valve, what Do you Think check. Cloudy fluid means there is water in the hydraulic spool valve pressure, when! Facility – Corporate Location part can save your company ’ s efficiency and money... Flow in one direction only Here can inspire company-improving ideas valves Shuttle valves Load/Motor controls controls... 2021 Global Electronic Services to request a quote with adjustable and non-adjustable pressure settings depends on the of! The actual unit all rights reserved beyond cylinder design limits from moving as needed most... Load turn an additional ¾ to 1 full turn & tighten lock nut the leaks originate around seals... Piston moves this position the valve working again, identify the cause of the lobe for. These problems depends on the website are not necessarily approved or endorsed by the trade names on. The problem center inside their valves have several possible causes Services, Inc. all rights reserved manufacturing may... The lobe than a dozen spool valve, clean out the system for leaks through the system means is. Industry news and innovations, subscribe to our blog hydraulic oil off until you must install new parts a relief. Because a cylinder encases the mechanism issues in-house, or did your business have another company make the repairs abilities!

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