SUNWARD SWE25UF - User Manual

Questions and Answers

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Patty Hall DDSAug 16, 2025
Why is the hydraulic pump noisy and the pipeline vibratory in my SUNWARD Excavators?
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  tracyvillegasAug 16, 2025
  If you notice a noisy hydraulic pump and vibratory pipeline in your SUNWARD Excavators, there are several potential causes. It could be a hydraulic malfunction, in which case you should consult with your dealer. Another cause could be air bubbles in the hydraulic system, so check for air leakage at the oil pump inlet pipeline. Also, aging hydraulic oil, degenerative oil mixed with moisture, or using the wrong brand and specification can produce bubbles, so consider replacing the oil. Lastly, low hydraulic oil temperature and high viscosity can cause this issue; try running the engine at low revs to warm it up.
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yatesrachelAug 19, 2025
Why does the hydraulic oil temperature rise too fast in SUNWARD SWE25UF?
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  Brittany BowmanAug 19, 2025
  If the hydraulic oil temperature in your SUNWARD Excavators rises too fast or becomes too high, there are a few possible reasons. First, check the surface of the oil cooler for dirt and clean it if necessary. It could also be caused by wear of hydraulic parts, reducing the cubage efficiency, in which case you should contact your dealer. Finally, frequent opening of the overfall valve and overload valve can cause this. If this is the case, evaluate your digging method, and avoid over digging or overloading.
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mollyyatesAug 22, 2025
What to do if control levers don't work on SUNWARD Excavators?
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  Shelly WernerAug 22, 2025
  If the control levers on your SUNWARD Excavators don’t work or work slowly, several factors could be responsible. If the machine has been out of use for a long time, air may have separated from the oil and accumulated in the pilot control pipeline and hydraulic cylinder. Try operating the control levers several times. Another potential cause is no pressure or exceeding pressure in pilot system, so inspect the hydraulic control system, low-pressure relief valve, and gear pump. Low hydraulic oil temperature can also lead to this issue, so be sure to warm up the machine. Lastly, consult with your dealer if there is a hydraulic pump malfunction or a main safety relief valve malfunction.
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Megan CrosbyAug 25, 2025
Why does one track of my SUNWARD SWE25UF not work or move slowly?
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  Ashley RobertsAug 26, 2025
  If one track of your SUNWARD Excavators doesn’t work or moves very slowly, leading to serious deflection during travel, there are several potential causes. It could be a control pilot valve malfunction, in which case you should repair it. Also, the corresponding commutator valve and stop valve might be malfunctioning, or there could be center connector seal damage, a hydraulic motor malfunction, or a travel redactor fault. In any of these cases, consult with the dealer. Finally, the displacement of the two-gang hydraulic pump may not be equal, in which case you should also consult with the dealer.
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garciasarahAug 27, 2025
What causes the slewing platform to not slew smoothly on SUNWARD Excavators?
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  Adam CochranAug 27, 2025
  If the slewing platform on your SUNWARD Excavators doesn’t slew, slews slowly, or doesn’t slew smoothly, several issues could be the cause. It might be a corresponding pilot valve malfunction or a hydraulic motor malfunction. Alternatively, there could be a slewing retarder malfunction or a slewing bearing malfunction. For hydraulic motor, slewing retarder malfunction you should consult with your dealer, for pilot valve or slewing bearing malfunction you should repair it. Also, the slewing bearing may need lubricant grease, so add lubricant grease.
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Kimberly HaynesAug 30, 2025
What causes a cylinder to not work on SUNWARD SWE25UF Excavators?
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  Christopher HallAug 30, 2025
  If a cylinder on your SUNWARD Excavators doesn’t work or works slowly, several issues could be the cause. It might be a corresponding pilot valve malfunction, a corresponding commutator valve malfunction, or a corresponding overload valve malfunction. Alternatively, the hydraulic cylinder pole could be damaged, or the hydraulic cylinder interior seals could be damaged. For commutator valve malfunction, overload valve malfunction or hydraulic cylinder pole damaged you should consult with your dealer, for pilot valve malfunction you should repair it. If the hydraulic cylinder interior seals are damaged, replace the oil seals.
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Taylor MoraSep 1, 2025
Why is the heating effect not good in SUNWARD SWE25UF Excavators?
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  Terri WrightSep 2, 2025
  If the heating effect in your SUNWARD Excavators is not good, it could be due to a hot water tube circuit block, in which case you should check the tube circuit. Alternatively, there might be heavy dust on the heater core surface, so clean the core surface.
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williamsonrobertSep 4, 2025
What to do if SUNWARD Excavators have unexpected actions without operating?
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  Timothy AcostaSep 5, 2025
  If some unexpected actions occur without operating your SUNWARD Excavators, it may be due to a multitandem valve lever block or a pilot valve core block. In either case, contact the dealer.
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Travis HernandezSep 7, 2025
What causes work device malfunction in SUNWARD Excavators?
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  Jennifer GrahamSep 7, 2025
  A work device malfunction in SUNWARD Excavators is usually caused by the block of the multitandem valve lever’s one-way valve. Inspect and replace it.
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Brian VillegasSep 10, 2025
Why does the heater unit stop working in SUNWARD SWE25UF?
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  brandonortizSep 10, 2025
  If the heater unit in your SUNWARD Excavators stops working, it could be due to a circuit break or bad grounding. Check and repair the circuit or grounding as needed.