ご依頼背景

We received an inquiry stating, “While using the Zenoah hammer knife mower ZHM1520, the blades are not rotating properly and work efficiency has declined.” Upon inspection, we found that the knives (replacement blades) themselves were significantly worn, and the brackets (the parts where the blades are mounted) had spread, causing looseness during installation. As these are consumable parts, replacement and adjustment are often necessary after one season of use.

The customer expressed concern, saying, “The decline in mowing efficiency is a significant burden due to the large work area.” Therefore, in addition to blade replacement and bracket adjustment, the customer requested oil and filter replacement as well, considering future maintenance needs.

By performing knife replacement, bracket adjustment, and oil and filter replacement on the Zenoah ZHM1520, the efficiency and stability of the mower were greatly improved. Thank you to our customer in Ota City, Gunma Prefecture, for your continued business.

For mowing work that requires long hours of operation over a short period due to its seasonal nature, it is important to regularly check for parts wear and looseness, and to detect and repair issues early. If you feel that the mower is difficult to use or that work efficiency has declined, please contact Sai Heavy Machinery Engineering.

For Those with Similar Concerns

• “The cutting height has become uneven…”
• “The blade edges are worn and work efficiency has declined…”
• “I’m concerned about looseness in the brackets…”

If you recognize any of these symptoms, please consider inspection and repair as soon as possible. At Sai Heavy Machinery Engineering, we have experience not only with the ZHM1520 but also with other models such as the ZHM1510, ZHM1520RR, and ZHM1550.

We have extensive repair experience with hammer knife mowers and various construction machinery, so you can trust us with confidence.

Please feel free to contact us with requests such as “I would like my company’s hammer knife mower inspected” or “I would like to request regular maintenance.” If you send us details through our inquiry form, we will respond promptly.

Alternatively, please feel free to contact us through our official LINE account below. You can easily send photos when explaining symptoms.

https://page.line.me/228qukmn?oat_content=url&openQrModal=true