Pfaff 481, 483 service manual Tools, gauges and other adjustment aids, Abbreviations

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Notes on safety

●The machine must only be operated in full knowledge of the instruction book and by persons with appropriate training.

●Before commissioning the machine also read the motor manufacturer’s safety notes and instruction manual.

●The machine must only be used for the purpose intended. It must not be operated without the safety devices it is equipped with; all valid safety regulations must be adhered to.

●When gauge parts are exchanged (e.g. needle, presser foot, needle plate, feed dog and bobbin), during threading, when the workplace is left, and during service work, the machine must be isolated from the mains by switching off the main switch or disconnecting the mains plug.

●On mechanically operated clutch motors without start inhibitor it is necessary to wait until the motor has stopped.

●Daily servicing work must only be carried out by persons with appropriate training.

●Repairs and special maintenance work must only be carried out by trained technicians or persons with appropriate training.

●For service or repair work on pneumatic systems the machine must be disconnected from the compressed air supply system. The only exceptions to this are adjustments and function checks carried out by appropriately trained technicians.

●Work on the electrical equipment must only be carried out by electrical engineers or other appropriately trained technicians.

●It is not permitted to work on live parts. For exceptions please see the EN 50 110 regulations.

●Conversions or changes to the machine must only be made on adherence to all safety regulations.

●For repairs, only replacement parts approved by us must be used.

●The sewing head must not be operated until it is ascertained that the whole sewing unit corresponds to EC-regulations.

Tools, gauges and other adjustment aids

●1 set of screwdrivers with blades from 2 to 10 mm wide

●1 set of spanners from 7 to 14 mm wide

●1 set of hexagonal allen keys ranging from 1.5 to 6 mm

●1 wrench, 22 mm wide

●1 metal ruler (part No. 08-880 218-00)

●1 cylindrical pin (5 mm in diameter), part No. 13-030 341-05

●1 adjustment gauge, part No. 61-111 642-19

Notes on the service manual

All the adjustments in this service manual apply for a completely mounted machine. No mention is made of the machine covers that occasionally have to be screwed off and back on for testing and adjustment purposes.

The screws and nuts in brackets ( ) are for the attachment of machine parts that must be loosened before the adjustments and tightened up again afterwards.

Abbreviations

t.d.c = top dead center

b.d.c. = bottom dead center

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Contents 481 483 Contents Abbreviations Tools, gauges and other adjustment aidsChecking and adjustment aid Preliminary adjustment of needle height Zeroing the feed motion Zeroing procedure with the gearbox closedZeroing procedure with the gearbox open Pfaff Feed lifting motion Feed dog height Feed driving motion Pfaff For Pfaff Centering the needle in the needle holeFor Pfaff Eccentric hook shaft bearing and hook-to-needle clearance Pfaff Vertical position of bobbin case opener Position of bobbin case opener Timing the bobbin case opener Clearance between presser foot and needle plate Pfaff Tension release mechanism Thread check spring and thread regulator Knee lever resting position Knee lever play Adjusting the knee lever motion Bobbin winder Limiting the stitch length Matching forwards and reverse stitch lengths Presser foot pressure Page Pfaff Aktiengesellschaft

481, 483 specifications

The Pfaff 481 and 483 are renowned industrial sewing machines celebrated for their robust construction and advanced features tailored for heavy-duty sewing applications. These models are particularly favored in industries dealing with leather, canvas, and other heavy materials, making them ideal for manufacturing products like bags, belts, and upholstery.

Both the Pfaff 481 and 483 share a powerful sewing mechanism that operates at high speeds, enhancing productivity in industrial settings. They are equipped with a walking foot system that ensures even feeding of multiple layers of thick materials, significantly reducing the risk of puckering or uneven stitches. This feature is essential when dealing with bulky fabrics, as it allows for consistent stitching quality across varying thicknesses.

One of the main characteristics of these models is their superior stitch quality. The Pfaff 481 and 483 utilize a high-quality needle bar that delivers precise needle penetration and minimizes thread breakage. Their stitch length can be easily adjusted, allowing for versatile applications from heavy tacking to delicate decorative stitches. Additionally, these machines support various stitch styles, including straight, zigzag, and overlock stitches, providing versatility for diverse sewing projects.

In terms of technology, the Pfaff 481 and 483 incorporate a clutch motor that delivers reliable power without compromising on performance. This motor is designed to handle heavy workloads, making the machines suitable for continuous use in demanding environments. The user-friendly interface and easy-to-navigate controls ensure that operators can quickly adjust settings according to their specific needs.

Moreover, both models are built with durability in mind. The heavy-duty metal framework provides stability during operation, which contributes to the longevity of the machines. Maintenance is also straightforward, with easily accessible parts that promote efficiency when servicing or replacing components.

In conclusion, the Pfaff 481 and 483 are exemplary industrial sewing machines known for their durability, advanced features, and high-quality performance. Their ability to handle tough materials and diverse sewing techniques makes them invaluable tools for professionals in the textile and manufacturing industries. Whether for leather work or heavy fabrics, these models deliver reliable results, ensuring that users can achieve their desired outcomes with ease and precision.
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