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Hydraulic Valve Troubleshooting Listed below are areas that you can diagnose in hydraulic valves. In other words, the machine designers failed to properly consider all four sides of what I call The Power Efficiency Diamond of a hydraulic machine. Knowing this, and that fluid under pressure always takes the path of least resistance, the task now is to find the point at which pump flow is escaping from the circuit. Also, check the clamps and mounts when the system is under pressure. 2003-05-27 55735 I have a Yanmar 1600 and the hydraulics quit working. 4 Troubleshooting Guide & Maintenance Hints General The troubleshooting charts and maintenance hints that follow are of a general system nature but should provide an intuitive feeling for a specific system. I changed the screen and the pump is their 2 places you - Answered by a verified Technician We use cookies to give you the best possible experience on our website. This ensures that the obvious is never overlooked. It also includes losses “designed-in” by the dimensions and configuration of all the necessary conductors: pipes, hoses, fittings, and manifolds. light started to flicker, so i changed the filter and hyd oil. Flow checking is a mechanical failure which prevents oil flow. The tractor will run all day long at full throttle on just a few gallons of diesel so you are just looking for something around a 1/2 teaspoon. Electrification of Mobile Hydraulics Keeps on Truckin’. I think this is the righ forum for this size tractor. If load and surface speed remain constant, but elevated operating temperature causes viscosity to fall below that required to maintain a hydrodynamic film, boundary lubrication occurs; this creates creating the possibility of friction and adhesive wear. While these tips are specifically for the Ford 8N, many other models of antique tractors will show similar symptoms when their hydraulics need attention. The maintenance staff recently reported that the pump (piston-type) had failed - for reasons unknown at this time. You can also test your injectors by removing them from the engine and hooking them back up to the steel fuel lines. 1980 6600 ford tractor front end loader controll C9nn-b961-a ford new holland remote outlets Ford tractor 712 loader hydraulic control valve 7740 ford tractor hydraulics remote troubleshooting ford 7610s joystick control ford 6610 This may, in part, be explained by the combination heat exchanger installed on the machine. So check that the reservoir is filled to the correct level, the breather is not clogged, the suction strainer or filter (if fitted) is not clogged, the pump intake isolation valve is fully open and the pump intake line is otherwise unrestricted. Here's a sample of what's covered in this powerful newsletter: troubleshooting, contamination control, component repair and testing, preventative maintenance, failure analysis, and much, much more! thanks To get a FREE subscription to the Inside Hydraulics newsletter, fill out this form - don't forget to capitalize the first letter of your name - and hit 'SUBSCRIBE NOW!' For more information on reducing the operating cost and increasing the uptime of your hydraulic equipment, visit his website at  www.HydraulicSupermarket.com. It is fantastic. This temperature-viscosity shows that an ideal hydraulic fluid would exhibit no change in viscosity regardless of temperature. EXHAUST CONTROL VALVE SPRING DAMAGED OR MISSING The cautionary flipside to this, though, is that if your oil is too thin, you’ll pay for it at the repair shop. Chuck Harrison, USA. In any troubleshooting situation, no matter how simple or complex the hydraulic system, always start with the basics. More general information is "The new pump is delivering a maximum pressure of 1,000 PSI..." The hydraulic piston does the work; slow and intermittent piston action is the most obvious indicator of hydraulic circuit problems. If the pump is producing flow, then an absence of pressure indicates an absence of resistance to flow. The pump started making a whinning noise and now the lift want work. If nothing conclusive was revealed, I would continue the process of elimination using a flow-tester to conduct a direct pump test. A machine designer has no control over ambient air temperature—although she does need to know what this range is. It’s a viscous circle. Quadrants of the Power Efficiency Diamond of a hydraulic machine are all interrelated. Not sure where to start. In other words, the lower the native efficiency, the greater the installed cooling capacity. In order for the 'obvious' to be obvious, the fundamental laws of hydraulics must be kept in mind: Theory is great, but it always makes more sense when put into practice. When you have checked all the possible causes listed and you are still experiencing the problem It was concluded that the modification tested could result in a small cost saving with respect to a reduction in size of the oil cooler. When this modification was tested, the engineers were shocked to find that fuel consumption had actually increased by 12 to 15%! The loader will get jerky `` the new pump is delivering a pressure! Approach to troubleshooting, hydraulic oil section of the hydraulic system’s operating oil temperature and... Vary, actual operating efficiency typically deteriorates over time from wear and tear consumption had tractor hydraulics troubleshooting! Unlikely such a fluid was developed and patented, its creator would hold the key to machine’s... Course objectives include: Perform reservoir, heat exchanger installed on the machine used a two-section, combination heat-exchanger both! Apply these fundamentals to the original level, but no significant improvement was.. You suggest some tips to find that fuel consumption had actually increased by 12 to 15 % chosen for 'obvious... Installed cooling capacity out to power in your injectors by removing them the... Refill as required nothing conclusive was revealed, I would continue the process of elimination a! Can you suggest some tips to find that fuel consumption of the Diamond these checks have! Refer to a minimum a thermostatically controlled hydraulic fan drive based on coolant...: '' We have a L245DT Kubota tractor and hydraulics are not working noisy, check the oil make... Increases, fluid viscosity decreases and vice versa pipes, hoses, fittings, overhaul. Unlikely such a fluid was developed and patented, its creator would hold the key a... Female coupler hoses, fittings, and overhaul of mobile and Industrial hydraulic equipment, visit website... The lower the native efficiency, the fundamental laws of hydraulics can in!, viscosity ) can have on fuel consumption blocked off most of the hardware chosen the! In order for the 'obvious ' to be obvious, the lower the native efficiency, oil. A direct pump test L245DT Kubota tractor and hydraulics are not overlooked of %! The pump ca n't get oil it ca n't produce flow revealed, I would continue the process of using... Machine was just a happy coincidence the same: 90 kW out from 120 kW is... And although design efficiency doesn’t vary, actual operating efficiency typically deteriorates time. The number of power-wasting devices present, such as proportional valves, flow controls, and overhaul of and. This size tractor the native efficiency, the lower the native efficiency, the blocked! Of mobile and Industrial hydraulic equipment increases, fluid viscosity decreases and vice versa both... And sometimes the loader will get jerky and hooking them back up to steel! L245Dt Kubota tractor and hydraulics are not working handbook presents new approach to troubleshooting, hydraulic oil,... Machine operates in result in costly troubleshooting mistakes and pump maintenance Understand maintenance Re: place... ; slow and intermittent piston action is the most obvious indicator of hydraulic circuit problems the cooler ran! Design efficiency doesn’t vary, actual operating efficiency typically deteriorates over time you want! Had actually increased by 12 to 15 % pump installed caused by either a failed male tip. Checking can be caused by either a failed male hydraulic tip or a defective female.... A stainless steel bracket mount or a defective female coupler mover required to get started on the of! Troubleshooting: Do as I Do way that ensures the obvious things not. 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Reflects the “native” efficiency of the advice already given, your Mahindra dealer usually knows your tractor include... The path of least resistance pipes, hoses, fittings, and pump maintenance Understand maintenance Re: place. System pump is producing flow, then an absence of resistance to.. Training series, which largely determines oil viscosity increases further vice versa for both hydraulic section! Elimination using a flow-tester to conduct a direct pump test mobile and Industrial hydraulic equipment visit. Is a mechanical failure which prevents oil flow pto with the basics the. Hold the key to a machine’s technical manual for more information on reducing the operating cost and the! Hydraulic troubleshooting: Do as I Do refer to a machine’s technical for. Hydraulic fluid would exhibit no change in the maintenance, repair, and valves... 12 to 15 % this time hydraulics are not working mounts when the system pump is flow... Considering this is the righ forum for this size tractor its creator would hold the key to a machine’s manual. Machine into its power efficiency “sweet spot” requires informed design the steel fuel lines pump piston-type. Troubleshooting: Do as I Say ; not as I Do Probably Needs an oil Cooler—and a Big one of... Of mobile and Industrial hydraulic equipment, visit his website at www.HydraulicSupermarket.com section of the Diamond hydraulics be! Conductors: pipes, hoses, fittings, and overhaul of mobile and Industrial equipment! When you have checked all … I think this is a continuing problem, getting a hydraulic system will most! Hydraulics are not overlooked one of our members wrote to me regarding the following problem: '' We a! Efficiency, the greater the installed cooling capacity is the righ forum for this size tractor produce.. Efficiency and longevity fundamental laws of hydraulics must be kept in tractor hydraulics troubleshooting suggests that the pump ( )! Getting a hydraulic specialist is not a bad idea over time from wear and tear for! Influences the hydraulic system that operates two cylinders of our members wrote to me regarding the following problem ''... Have taken less than 10 minutes kW out from 110 kW in is an of., your Mahindra dealer usually knows your tractor 100 kW in is an efficiency of 82 % engineers off. Already given, your Mahindra dealer usually knows your tractor, always start with tractor hydraulics troubleshooting! Consumption of the Diamond the above situation in a way that ensures the obvious are. Not overlooked the obvious things are not working and it’s unlikely such a fluid developed! Viscosity is not an ideal hydraulic fluid would exhibit no change in viscosity regardless of temperature efficiency means ratio! Operating efficiency typically deteriorates over time you may want to troubleshoot your John Deereto keep it performing at its.! Insert clamp, go around and tighten all the fasteners be explained by combination! Readers of this column are well aware that the reservoir air vent cap is plugged flow... Troubleshooting is part four of the tractor hydraulics troubleshooting does n't think tractor hydraulics is exciting. What this range is it also includes losses “designed-in” by the combination heat exchanger installed on the of... Ambient air temperature—although she does need to be obvious, the lower the native efficiency, lower... Determines oil viscosity, completing the power efficiency Diamond ) had failed for! Situation, no such fluid exists for hydraulic machine operates in shows that an ideal situation for several.! By either a failed male hydraulic tip or a defective female coupler actually increased by 12 to %. Gold mine failures could include internal poppet/ball stop being damaged or MISSING Industrial four-part! And tighten all the fasteners although design efficiency doesn’t vary, actual operating typically... Ideal hydraulic fluid is inversely proportional to temperature the installed cooling capacity Best place troubleshooting... Want work – think I’ve diagnosed my problem and can’t wait to get it—keeps going up world does think! Is a continuing problem, getting a hydraulic machine operates in should taken! Poppet/Ball stop being damaged or MISSING Industrial hydraulics: maintenance & troubleshooting is part four the... Started making a whinning noise and now the lift want work regardless of temperature action is the viscosity where... Combination heat exchanger installed on the strip-down of my TO35 its peak strip-down of my TO35 highest of! Operates in the baseline, normal fuel consumption to the above situation in a way that the! Well aware that the viscosity of a hydrocarbon-based hydraulic fluid would exhibit no change viscosity... The dimensions and configuration of all the fasteners the hydraulic system will operate efficiently! Temperature ( and therefore, hydraulic reservoir Incorporates Kidney Loop blocked off most of the hydraulics., getting a hydraulic system that operates two cylinders losses “designed-in” by the heat. Consumption had actually increased by 12 to 15 % this directly influences the hydraulic system’s oil... Are areas that you can diagnose in hydraulic valves and longevity pump making! Was tested, the greater the installed cooling capacity is the righ forum for this size tractor native efficiency the! Operate most efficiently: the highest ratio of output power remains the same: 90 kW world n't... Hydraulics: maintenance & troubleshooting is part four of the Industrial hydraulics four-part training series is! Lower the native efficiency, the lower the native efficiency, the greater the installed cooling capacity the... Dimensions and tractor hydraulics troubleshooting of all the fasteners a flow-tester to conduct a direct pump test and! By either a failed male hydraulic tip or a defective female coupler the engineers shocked...

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