Hyundai 25L-7 Service Manual (English)

Questions and Answers:

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Lisa WilliamsAug 18, 2025
What to do if power is not transmitted in my Hyundai 25L-7?
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  John TaylorAug 18, 2025
  If power is not being transmitted in your Hyundai Forklifts, it could be due to several issues. Start by checking the oil level and adding oil if necessary. A damaged clutch plate could be the problem; listen for abnormal sounds at low converter speed and replace if damaged. Inspect the oil pump driving system for wear on the pump gear, shaft, and spline, replacing any defective parts. Other potential causes include a broken shaft, lack of oil pressure, improperly positioned inching valve and link lever or forward/reverse spool and link lever. Also, check for a clutch that fails to disengage or is seizing, a broken clutch snap ring, or a damaged clutch drum. For each of these, you should disassemble, check, and repair or replace the faulty components.
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John BoydAug 28, 2025
What to do if Hyundai 25L-7 has unusual oil pressure?
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  Richard BrennanAug 28, 2025
  If your Hyundai Forklifts is experiencing unusual oil pressure, a malfunctioning control valve could be the cause; check its spool operation and replace the valve if necessary. In cold weather with high oil viscosity, consider changing the oil if the atmospheric temperature is below freezing. The use of improper oil can also lead to pressure issues, so check and change the oil. Other potential causes include a malfunctioning (worn) gear pump, excessive oil leaks, or air being sucked in. Low oil level or a clogged oil filter can also contribute to unusual pressure. For issues like gear pump malfunction, excessive oil leaks, or air suction, disassemble, check, and repair or replace the affected components.
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floresronaldSep 2, 2025
What could cause Hyundai 25L-7 Forklifts to not transmit power, even after initial troubleshooting?
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  Brian LeeSep 2, 2025
  If power is still not being transmitted in your Hyundai Forklifts, even after initial checks, consider the possibility of foreign matter intruding into the oil passage to the clutch. Another potential cause is a worn shaft spline. In both cases, you should disassemble, check, and repair or replace the affected components.