I need a manual for Ryobi HT20VSK

Here is a link to the manual to your Royobi p400. You can download it. Tried to copy & paste the illustrations but they did not show up. Go to page 14 of the manual. Looks pretty easy, just peel down from top. Good luck. & happy Sanding.

CHANGING SANDING SHEETS AND PADS
HOOK-AND-LOOP
See Figure 8.
PAD
The sander is packed with sanding sheets and scrubbing
pads designed for a variety of uses. To change sheets and
SANDING
pads, simply pull the used sheet off the base and attach the
SHEET
desired sheet by pressing the sheet or pad onto the base
of the sander.
ROTATING THE SANDING SHEETS
See Figure 9.
The majority of wear in a precision sanding application occurs
at the tip of the sanding sheet. The unique Tri-Flex design of
the sanding sheets allows you to detach and rotate the top
two thirds of each and extend the life of the sheet.
To rotate the top of the sheet, simply remove the top two
thirds along the perforation. Rotate the sheet so that a clean
corner is located at the tip of the base. Press the sheet firmly
onto the pad.
NOTE: Scrubbing and polishing pads are not perforated
and cannot be rotated.

You can purchase replacement carbon brushes on amazon Amazon com Ryobi carbon brushes. I hope this was helpful. cheers

Try Ryobi on line for the part or a Ryobi service agent in your area. From experience it is generally cheaper just to get a new machine as the motor will be 2/3 the price of a new machine if you can get spares for it

www.manualsonline.com/

Ryobi is one of the cheapest drills. They are good for small projects. You need to upgrade to a better drill like milwalkie or Dewalt. Seems if you are drilling in concrete you need a corded hammerdrill. This will get the job done.

Is definitely a left hand thread on the bolt...your machine came with a small rod to hold the head while loosening or tightening the nut which holds the blade....there is a hole and a slot in the machines head to insert the rod....if you've lost it you can probably use a small piece of drill rod about 5/16 diameter or a drill bit to hold it ...turn nut in clockwise direction and it will probably come loose....good luck !!! ;-D

Dremel tools will fit.....do you care to sell either?

Cutting holes in wallboard, Removing grout, Deburring metal, Cutting fiberglass, Sanding in tight spots, Cutting the heads off stripped screws, Shaping metal, Cutting ceramic tile, Stripping old paint and varnish from woodwork, Removing window pane glazing, Grinding, Shaping and cutting in arts and crafts projects, Polishing metal, Engraving, Etching, Cutting marble, Cutting nails, Cutting plumbing pipe, Sharpening tools, Cutting wood.