This is the Viking 435 535 530 431 Huskylock Service Manual. It contains 21 pages of information on how to time and adjust the machines. This is a PDF Down-load-able Manual that you can print yourself or take to your local Office Supply Store or Print Shop and let them print and bind it for you. Our PDFs are set for printing. The PDF will be like the Original Manual with the pages being all Horizontal or all Vertical. The PDF can also be viewed on any computer! You can turn any page any direction you want for viewing with a click or two. We make our own PDFs, scanning and editing one page at a time. Our PDFs are in color whenever possible. We will email you a link to download the manual after the payment is verified. Please make sure your email address is correct when ordering.