Singer 188U31, 188U33, 188U35 Service Manual

Singer 188U31, 188U33, 188U35 manual cover

Pages 11

Year 1979

Language(s)

of 11

Singer 188U31, 188U33, 188U35 Specification

The Singer 188U31, 188U33, and 188U35 are industrial sewing machines designed for high-speed and precision sewing tasks, suitable for light to medium-weight materials. Each model is engineered with a robust construction to withstand continuous and demanding use in industrial environments. These machines feature a single-needle lockstitch mechanism, providing reliable stitch quality and consistency across various fabric types. The maximum sewing speed is approximately 4,000 stitches per minute, ensuring efficiency in production settings. The machines are equipped with an automatic lubrication system, which minimizes maintenance needs and extends the service life of critical components. The stitch length can be easily adjusted up to 5mm, allowing for versatility in sewing applications. A reverse feed lever is included for reinforcing stitches, enhancing the durability of finished products. The machines are powered by a high-performance clutch motor, delivering smooth operation and precise control. The sewing area is ergonomically designed, facilitating ease of use for operators and reducing fatigue during extended periods of operation. Each model is compatible with a range of optional accessories, enabling customization to meet specific sewing requirements. The Singer 188U31, 188U33, and 188U35 offer a balance of speed, reliability, and adaptability, making them ideal for garment manufacturing, upholstery, and other industrial sewing applications.

Singer 188U31, 188U33, 188U35 F.A.Q.

How do I thread the Singer 188U31 sewing machine?

To thread the Singer 188U31, start by raising the presser foot and turning the handwheel to raise the needle. Place the spool of thread on the spool pin and guide the thread through the thread guide, tension discs, and take-up lever. Finally, thread the needle from front to back.

What should I do if the Singer 188U33 is skipping stitches?

If the Singer 188U33 is skipping stitches, ensure that the needle is inserted correctly and is not bent or damaged. Check the threading and rethread the machine if necessary. Also, verify that the fabric and needle are compatible.

How can I clean and maintain the Singer 188U35 sewing machine?

To clean and maintain the Singer 188U35, regularly remove lint and dust from the bobbin area and feed dogs. Oil the machine according to the manual's instructions, focusing on the moving parts. Ensure the machine is unplugged during maintenance.

Why is the Singer 188U31 making a loud noise while sewing?

A loud noise from the Singer 188U31 could indicate a need for cleaning or oiling. Check for any thread or debris caught in the bobbin area. If the noise persists, inspect the needle and replace it if necessary.

How do I adjust the tension on the Singer 188U33?

To adjust the tension on the Singer 188U33, locate the tension dial, typically on the front of the machine. Increase tension by turning the dial to a higher number and decrease it by turning to a lower number. Test on a scrap fabric to achieve the desired stitch quality.

What needle should I use for heavy fabrics on the Singer 188U35?

For heavy fabrics on the Singer 188U35, use a size 16/100 or 18/110 needle. Ensure the needle is compatible with the thread and fabric type to avoid needle breakage and ensure smooth sewing.

How do I change the presser foot on the Singer 188U31?

To change the presser foot on the Singer 188U31, raise the presser foot lever and remove the current foot by pressing the foot release lever. Align the new presser foot with the foot holder and lower the presser foot lever to snap it into place.

Why is my Singer 188U33 sewing machine not feeding the fabric properly?

If the Singer 188U33 is not feeding fabric properly, check the feed dogs to ensure they are raised. Clean any lint or debris around the feed dogs and ensure the presser foot pressure is adequate for the fabric being sewn.

How can I troubleshoot bobbin winding issues on the Singer 188U35?

For bobbin winding issues on the Singer 188U35, ensure the bobbin is placed correctly on the winder spindle and the thread is threaded through the bobbin winding tension disc. Check if the winder stopper is engaging properly to stop winding when full.

What type of oil should I use for lubricating the Singer 188U31?

Use a high-quality sewing machine oil for lubricating the Singer 188U31. Avoid using household oils or WD-40 as they can damage the machine. Apply oil to the specified points as indicated in the user manual.