Xinhua Office Chair Repair

The hydraulic rod of the Xinhua office chair is faulty and needs to be completely replaced. You can replace it yourself or contact a repair service department for handling. Details are as follows:

I. Principles for Handling Hydraulic Rod Failures When the hydraulic rod (gas rod) of an office chair experiences failures such as inability to adjust height, automatic sinking, or inability to lock the height, it must be completely replaced because this component is designed as a one-time sealed unit. Once the internal sealing structure is damaged, it cannot be repaired. Forcing disassembly may lead to hydraulic oil leakage or component damage, posing safety risks.

II. Self-Replacement Process

1. Safely Remove the Old Rod

   • Prepare tools: large pipe wrench (or adjustable wrench), rubber mallet, gloves, safety goggles, lubricating oil (optional).
   • Removal steps:
     • Turn the chair upside down and use the pipe wrench to grip the metal collar connecting the hydraulic rod to the five-star base. Rotate counterclockwise vigorously (usually reverse-threaded) and, if necessary, drip lubricating oil to aid in loosening.
     • Observe the connection method between the chair seat base and the top of the hydraulic rod:
       • Snap-ring type: Use a screwdriver to pry open the metal snap ring and directly pull out the hydraulic rod.
       • Screw-fixed type: Unscrew the fixing screw in the center of the base and remove the hydraulic rod.

2. Accurately Measure and Purchase a New Rod

   • Measurement parameters:
     • Total length: The shortest length when the hydraulic rod is fully compressed.
     • Pipe diameter grade: Use calipers to measure the outer pipe diameter of the original rod. Common grades are Class 3 (approximately 50mm in diameter) and Class 4 (approximately 60mm in diameter).
     • Stroke: The difference in length between maximum extension and minimum compression.
   • Purchase advice: Bring the old rod or a photo of its dimensions and choose a new rod with SGS/BIFMA safety certification, priced around 30-100 yuan. You can purchase online or visit a hardware store, ensuring the size and grade match the original rod.

3. Install the New Rod

   • Clean the threads or connectors on the five-star base and chair seat base to prevent impurities from affecting the seal.
   • Align the bottom thread of the new rod with the five-star base and rotate clockwise to tighten (first by hand, then slightly reinforce with the pipe wrench).
   • Insert the top of the rod into the chair seat base and reinstall the snap ring or fixing screw.
   • Place the chair upright and repeatedly test the height adjustment to ensure smooth operation and secure locking.

III. Recommended Professional Repair Services If self-replacement is difficult, you can contact the following repair service departments:

• Xinhua County Qiyin Office Equipment Repair Service Department: Located in Beifeng Village, Menggong Town, established in August 2026, with a business scope including office equipment repair.
• Xinhua County Yangxi Town Xiangxin Office Equipment Repair Shop: Located in Yangxi Town, established in September 2026, also providing office equipment repair services.

It is advisable to call in advance to inquire whether they undertake office chair hydraulic rod replacement services and to confirm service fees and appointment times.