LS tractor K5055-4WD - User Manual

Questions and Answers

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Juan HutchinsonAug 17, 2025
How to troubleshoot swing, boom, dipperstick, and bucket cylinders on LS tractor?
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  Rachel WalkerAug 17, 2025
  If the swing, boom, dipperstick, and bucket cylinders on your LS tractor aren't working correctly, start by checking the hydraulic fluid level and replenishing if low. Ensure that all hydraulic hoses are properly connected and not blocked. Look for any damage to the hoses. Also, inspect the control valve linkage for breakage and repair if needed. Make sure the quick disconnect couplers are fully connected, and replace them if necessary. If the problem persists, there may be an issue with the cylinder piston assembly, and you should check the cylinders for internal leakage.
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john36Aug 20, 2025
Why are the cylinders on my LS tractor moving slowly and erratically?
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  Victoria PhamAug 20, 2025
  If you notice slow or erratic cylinder movement, along with noisy operation in your LS tractor, there are several potential causes. First, ensure the hydraulic fluid level is adequate and replenish if necessary. Allow the hydraulic system to warm up, especially if the fluid is cold. Make sure the engine RPM is sufficient for proper hydraulic pump operation. Reduce the material load if it exceeds the backhoe's capacity. Check the control valve linkage for any binding or defects and repair if needed. Also, inspect hoses and tubelines for restrictions. If these steps don't resolve the issue, the cylinder piston assembly may be leaking, or the control valve may be internally leaking.
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Lisa BensonAug 22, 2025
Why does my LS tractor have inadequate lifting capacity?
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  Karen EllisAug 22, 2025
  If your LS tractor has inadequate lifting capacity, begin by increasing the engine RPM. Reduce the load if it exceeds the specified loader capacity. Inspect the relief valve setting and reset it as needed. Check the bucket, boom, and dipperstick cylinders for leakage and repair if necessary. If the issue continues, the control valve might be leaking internally, and it may need replacement.
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Anthony WareAug 25, 2025
What to do if hydraulic fluid aeration occurs in LS tractor?
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  Matthew DiazAug 26, 2025
  If the hydraulic fluid in your LS tractor appears foamy, it indicates aeration. First, check and refill the hydraulic system to the correct level. Then, inspect for loose or defective connections between the reservoir and hydraulic pump that could be allowing air to leak into the suction side. Finally, make sure you are using the recommended hydraulic oil, and replace it if necessary.
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Kaitlin Fuller MDAug 27, 2025
Why is the system relief valve squealing on my LS tractor?
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  Michael ShepardAug 28, 2025
  If the system relief valve on your LS tractor is squealing, first check the hydraulic oil to ensure it has the correct number and viscosity, and refill if needed. Reduce the load if it exceeds the backhoe's specified capacity. Check and reset the valve setting as needed. Also, inspect the hydraulic hose, tubeline, or quick disconnect coupler for restrictions and repair or replace any defective components.
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Veronica SimsAug 30, 2025
How to fix external hydraulic fluid leakage in LS tractor?
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  Nathaniel JenkinsAug 30, 2025
  If you notice external hydraulic fluid leakage on your LS tractor, start by tightening any loose connections. Check for the origin of the oil leak and replace any defective hydraulic hoses, tubelines, adapter fittings, or adapter fitting o-rings. Replace any defective control valve o-rings. If the control valve spool or body is damaged or worn, replace the control valve. Also, check cylinders for leakage and repair as needed.
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Kristina MorrisSep 2, 2025
What causes inadequate hydraulic pump capacity in LS tractor?
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  Sheryl WongSep 2, 2025
  If the hydraulic pump on your LS tractor has inadequate capacity, allow the hydraulic fluid to warm up to operating temperature. Increase the engine RPM. Check for evidence of restriction in hydraulic hoses.
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Lauren RileySep 5, 2025
Why does the backhoe on my LS tractor drop when the control valve is centered?
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  Alan DominguezSep 5, 2025
  If the backhoe on your LS tractor drops when the control valve spool is in the centered position, and there's no external oil leakage, check the cylinders for leakage. If leakage is not the issue, the control valve may have internal leakage and may need to be replaced.
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Kelly RichardsSep 7, 2025
What to do if cylinders operate in wrong direction on LS tractor?
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  Angela WallaceSep 7, 2025
  If the cylinders on your LS tractor are operating in the wrong direction relative to the control valve lever position, the hydraulic hoses may be connected incorrectly. Correct the hydraulic hose connections to resolve this issue.
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Billy ThompsonSep 10, 2025
Why won't the control valve spool return to the centered position on my LS tractor?
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  pjosephSep 10, 2025
  If the control valve spool(s) on your LS tractor will not return to the centered position, determine the origin of any binding in the control lever linkage and repair it. If the control valve spool centering is broken, replace the centering spring. If the control valve spool is binding in the valve body spool bore, disassemble the valve for inspection and repair.

Summary

WARRANTY CONDITIONS

Warranty Coverage

Defines the scope of warranty for LS Mtron Backhoe parts.

Warranty Provisions

SAFETY

SAFETY PRECAUTIONS

Essential safety guidelines for operating the backhoe and tractor.

SAFETY DECALS

Safety Decal Locations

TRACTOR PREPARATION

BACKHOE OPERATION

Precautionary Notes

Lists essential checks and safety reminders before operating the backhoe.

BACKHOE REMOVAL

BACKHOE MOUNTING

LUBRICATION AND MAINTENANCE

TROUBLE SHOOTING

HYDRAULIC SYSTEM SCHEMATIC

TORQUE TIGHTENING CHART

DECALS

LS tractor K5055-4WD Specifications

General

Engine Power	55 HP
Engine Type	4-cylinder Diesel
Transmission	Synchro Shuttle
Drive Type	4WD
Hydraulic System	Open Center
PTO Power	47 HP
PTO Speed	540 RPM
Weight	4, 189 lbs