Below are links to Piper Manuals covering the following Cherokees: 140, 150, 150, 180, 235, Arrow 180 and Arrow 200. I think Cherokees through model year 1976. After the file opens just download it to your computer.
Service Manual 753-586
http://drive.google.com/file/d/0B2lGqtPESTvOTkpsaDhmMmh2SUk/view?usp=sharing
Parts Catalog 753-582
http://drive.google.com/file/d/0B2lGqtPESTvOenRRdFZhR0IxaWc/view?usp=sharing
Service Manual 753-586
http://drive.google.com/file/d/0B2lGqtPESTvOTkpsaDhmMmh2SUk/view?usp=sharing
Parts Catalog 753-582
http://drive.google.com/file/d/0B2lGqtPESTvOenRRdFZhR0IxaWc/view?usp=sharing