Used Sany excavator 65

  • John Deere Tractor Hydraulics Troubleshooting Guide

    I am frustrated with my loader and need advice - Loaders

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  • The Root Cause of Hydraulic Cylinder Drift

    A popular misconception involving hydraulic cylinders is that if the piston seal is leaking, the cylinder will drift. While a leaking piston seal can be the root cause of cylinder drift, the physics involved are often misunderstood. Fact is, if the piston seal is completely removed from a double-acting cylinder, the cylinder is filled with oil and the ports are plugged, the cylinder will hold

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  • Five Reasons Your Final Drive Lacks Power - Final Drive

    Dec 21, 2017 · 5 Potential Causes of a Weak Travel Motor. Lack of power is a common complaint when a final drive or travel motor is in need of service. It reveals itself when your machine can't climb a steep grade or keeps steering to one side.

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  • I also have a Deere 410C backhoe that the front loader is

    A popular misconception involving hydraulic cylinders is that if the piston seal is leaking, the cylinder will drift. While a leaking piston seal can be the root cause of cylinder drift, the physics involved are often misunderstood. Fact is, if the piston seal is completely removed from a double-acting cylinder, the cylinder is filled with oil and the ports are plugged, the cylinder will hold

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  • Symptoms of Common Hydraulic Problems and Their Root Causes

    Slow Operation. A reduction in machine performance is often the first indication that there is something wrong with a hydraulic system. This usually manifests itself in longer cycle times or slow operation. It is important to remember that in a hydraulic system, flow determines actuator speed and response. Therefore, a loss of speed indicates a

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  • John Deere Tractor Hydraulics Troubleshooting Guide

    Loader Problems. When it comes to the loader, the boom arms may not rise or rise slowly. This issue could be partly because of boom and bucket overload, low oil flow from the pump, auxiliary circuit on-over relief, control linkage binding, cylinder shafts are bent or the pump is damaged.

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  • Hydraulic Valve Troubleshooting | Hydraulic Valve

    Consider the following when troubleshooting relief valves because they have low or erratic pressure: • Adjustment is incorrect. • Dirt, chip, or burrs are holding the valve partially open. • Poppets or seats are worn or damaged. • Valve piston in the main body is sticking. • …

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  • Ford Tractor Hydraulic System Troubleshooting | It Still Runs

    Ford tractors use hydraulic assist systems to raise, lower or move a variety of lifts, loaders and earth-moving tools. All Ford tractors have the same hydraulic components: a pump, reservoir, high-pressure filter, hoses and fittings and hydraulic pistons. Having "inline hydraulic systems" means that …

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  • JD 1520 weak hydraulics | Green Tractor Talk

    Aug 25, 2020 · Single acting boom cylinders on loader if it's a JD FEL sounds as if it's a model 37. If so boom cylinder shaft is 1.750 in in diameter which isn't going to provide a large amount of lifting capability. To increase lifting capacity a little I suggest to raise hyd stand-by pressure to 2350 psi.

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  • MF 135 Loader Hydraulics weak and slow | Page 2 - TractorByNet

    May 02, 2012 · After we removed and cleaned the filter as has been said previous, and changed the gearbox oil, the speed of the loader doubled, and it will lift a 1 ton bag of sand, which is enough to bring the back wheels off the ground if there is no block on ignore the rear link arms dropping which doesn affect the FEL as this is just oil; leaking from the rear lift cylinder back into the gearbox.

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  • I am frustrated with my loader and need advice - Loaders

    If the gauge starts at 1000 psi a weak loader valve may not register on the gauge. The usual way to test the system relief pressure is to dead end a gauge (for a short time) after the relief valve. The valve should open and squeal during the test. The system relief dose sound OK though.

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  • 1070 Case Hydraulic Problems - General Chat - Red Power

    Nov 24, 2017 · Well I replaced all 4 short hoses to the loader boom cylinders. 2 of them had all the rubber coating rotted off so just got 4 new 1/2:" hoses just to make them the same. The loader works fine, and the pump has good flow and pressure on the flo rater. I'm …

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  • Heavy Equipment: 855d case loader hydraulic problem

    Feb 10, 2016 · 855d case loader hydraulic problem. The lift boom is weak under a load, but if I curl the bucket and hold the curl on while I lift the boom it lifts good. But the second I let off the curl it stops lifting. There is no backhoe,ripper or 4in1 bucket on this machine, it does have an extra control valve in the stack that is not being used.

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  • Loader boom - weldingweb.com

    Sep 06, 2021 · Spindles can snap or axles crack when traveling with a heavy load. I always go very slow even without using the loader boom. Seen way too many tractors with broken axles. Going to fast on uneven ground and bouncing a load can easily double the load on a axle. My Massey has a much more stout axle than my old M.

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  • The Housing Boom Is Not A Bubble - forbes.com

    Oct 05, 2021 · The housing boom is not a bubble—but prices are likely to fall when interest rates rise. Unemployment and recession will not come as they did in the …

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  • kubota hydraulic problem solved | Tractor Forum

    May 17, 2013 · It could be a piece of dirt stuck in the pressure relief valve. As far as it getting worse the more you use the machine, it's because the oil is getting thinner as it gets hotter and its easier for the oil to go were its not supposed to. I had a loader tractor that did the same thing but it …

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  • hydraulic problem on my tractor front end loader - YouTube

    Most of the time it works perfectly, but sometimes the front end loader arm moves extremely slow up and down. The bucket moves fine. When the bucket is moved

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  • '73 410, slow loader bucket hydraulics, weak hoe

    Sep 02, 2011 · '73 410, slow loader bucket hydraulics, weak hoe hydraulics. Jump to Latest Follow 1 - 6 of 6 Posts. D What is happening is when I push the main boom down to the ground to swing the hoe over a few feet, I noticed once pressure hits the boom and it starts to lift the hoe, it gets weak and sinks for a second, then like a void is filled it

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  • B7200HST Weak hydraulics | OrangeTractorTalks - Everything

    Jul 05, 2019 · The loader moves slow. The valve does have 7 hoses. 4 of them that come out of the top & go to the loader cylinders, 1 pressure that I have a gauge in, 1 return that comes out of the front of the valve that goes back to the top of the rear end and 1 that comes out of the right side of the valve and goes down to the block where the pressure line

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  • B7200HST Weak hydraulics | OrangeTractorTalks - …

    May 09, 2018 · Run a cycle time on the boom up function. Stretch out the stick, open the bucket and set it on the ground. Now with the engine at full throttle, snap the boom control to full up and then time how long it takes to top out. It should be about 4 seconds or less. 4.5 seconds is getting slow while 3.5 seconds is very fast.

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