Troubleshooting Guide for meite MT Series Upholstery Staplers

The meite MT Series pneumatic staplers, including popular models like MT7116, MT7116LN, MT8016LN, and MT5016S, are widely used for furniture manufacturing, interior decoration, and various woodworking applications. Known for their durability, precision, and high-speed stapling, these tools can occasionally face operational issues due to wear, improper setup, or environmental factors.

In this troubleshooting guide, we’ll cover common problems, their causes, and solutions to help you quickly restore your stapler’s performance. Whether you’re dealing with staples driving too deep, not firing, jamming, or air leaks, this resource will help you maintain your tool effectively and extend its service life.

Problem 1: Staples Are Jammed

Cause

• The driver may be uneven or severely worn out, preventing full firing motion.
• The staple gun's muzzle panel is damaged.
• Non-standard staples that are too short, too long, or incorrect gauge can block the path or misfire.

Solution

• Smooth the front of the driver or replace it with a new one.
• Replace the staple gun's muzzle panel.
• Use standard meite staples that match the model’s specifications.

Problem 2: Stapler Does Not Fire or Skips Firing

Cause

• Staples are not up to spec (wrong size, length, bent, or low-quality).
• Insufficient air pressure prevents the driver from returning completely to its original position.
• The return spring inside the staple track may have broken or lost tension.
• The propellent solder is deformed or damaged.
• The driver pin is bent or damaged.
• The bumper or O-ring of the driver is damaged.

Solution

• Replace with high-quality, meite-standard staples.
• Inspect and adjust the air pressure to the standard level.
• Install a new return spring to ensure proper staple feeding.
• Replace the propellent solder.
• Replace the driver.
• Replace the bumper or O-ring.

Problem 3: Staples Drive Too Deep

Cause

• The air pressure from the compressor is set too high, causing the driver to push the staples too far into the material.
• The bumper may be worn, allowing deeper penetration than normal.

Solution

• Adjust the compressor to a lower PSI (usually recommended around 70–90 PSI for meite MT series tools).
• Replace the bumper with a new one.

Problem 4: Staples Do Not Drive Fully (Shallow Stapling)

Cause

• Insufficient air pressure from the compressor can prevent full driving force.
• The O-ring of the driver or driver tip may be worn.
• Internal lubrication may be lacking, increasing resistance in the moving parts.
• The gas valve or muffler is clogged.

Solution

• Increase the air pressure to the recommended operating range (typically 70–100 PSI).
• Check and replace the O-ring or driver blade if worn or damaged.
• Add lubricating oil (2–3 drops) into the air inlet before use to reduce friction. Internal parts may also require lubrication after extended use.
• Clean the gas valve or muffler.

Maintenance Tips for Longevity

• Lubricate Regularly: Add 2–3 drops of pneumatic oil to the air inlet before and after use to keep the internal mechanism smooth.
• Use Clean, Dry Air: Moisture in the air supply can corrode internal components. Always use a moisture filter if possible.
• Inspect Frequently: Check for loose screws, worn rubber seals, or any visible damage after heavy usage.