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Page 3

RULES FOR SAFE OPERATION (Continued)

15. SECURE WORK. Use clamps or a vise to hold work. It's safer than using your hand and it frees both

hands to operate the tool.

16. DON'T OVERREACH. Keep proper footing and balance at all times.  Do not use on a ladder or

unstable support.

17. MAINTAIN TOOLS WITH CARE. Keep tools sharp at all times, and clean for best and safest

performance. Follow instructions for lubricating and changing accessories.

18. DISCONNECT TOOLS. When not in use, before servicing, or when changing attachments, blades,

bits, cutters, sandpaper, etc., all tools should be disconnected from power supply.

19. REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of checking to see that keys and

adjusting wrenches are removed from tool before turning it on.

20. AVOID ACCIDENTAL STARTING. Don't carry plugged-in tools with finger on switch.  Be sure switch

is off when plugging in.

21. OUTDOOR USE EXTENSION CORDS.  When tool is used outdoors, use only extension cords

suitable for use outdoors. Outdoor approved cords are marked with the suffix W-A, for example -
SJTW-A or SJOW-A.

22. NEVER USE THIS OR ANY POWER SANDER FOR WET SANDING OR LIQUID POLISHING.

Failure to comply can result in electrical shock causing serious injury or worse.

23. KEEP HANDS AWAY FROM SANDING AREA AND MOVING SANDING BELT.

24. NEVER USE IN AN EXPLOSIVE ATMOSPHERE. Normal sparking of the motor could ignite fumes.

25. INSPECT TOOL CORDS PERIODICALLY and if damaged, have repaired by an authorized service

center. Stay constantly aware of cord location.

26. INSPECT EXTENSION CORDS PERIODICALLY and replace if damaged.

27. KEEP HANDLES DRY, CLEAN, AND FREE FROM OIL AND GREASE. Always use a clean cloth

when cleaning. Never use brake fluids, gasoline, petroleum-based products or solvents to clean your
tool.

28. STAY ALERT. Watch what you are doing and use common sense. Do not operate tool when you

are tired. Do not rush.

29. CHECK DAMAGED PARTS. Before further use of the tool, a guard or other part that is damaged

should be carefully checked to determine that it will operate properly and perform its intended
function.  Check for alignment of moving parts, binding of moving parts, breakage of parts, mounting,
and any other conditions that may affect its operation. A guard or other part that is damaged should
be properly repaired or replaced by an authorized service center.

30. DO NOT USE TOOL IF SWITCH DOES NOT TURN IT ON AND OFF. Have defective switches

replaced by an authorized service center.

31. Inspect for and remove all nails from lumber before sanding.

32. DRUGS, ALCOHOL, MEDICATION. Do not operate tool while under the influence of drugs, alcohol,

or any medication.

33. DO NOT USE THIS SANDER FOR OVERHEAD SANDER. Overhead sanding could result in

dropping sander or loss of control. These situations could result in an accident resulting in possible
serious injury.

34. When servicing use only identical Ryobi replacement parts.

35. SAVE THESE INSTRUCTIONS. Refer to them frequently and use them to instruct others who may

use this tool. If you loan someone this tool, loan them these instructions also.

Summary of Contents for B850

Page 1: ...ured to Ryobi s high standard for dependability ease of operation and operator safety Properly cared for it will give you years of rugged trouble free performance CAUTION Carefully read through this entire owner s manual before using your new sander Pay close attention to the Rules for Safe Operation Warnings and Cautions If you use your sander properly and only for what it is intended you will en...

Page 2: ...ension cord 7 STORE IDLE TOOLS When not in use tools should be stored in a dry high or locked up place out of the reach of children 8 DON T FORCE TOOL It will do the job better and safer at the rate for which it was designed 9 USE RIGHT TOOL Don t force small tool or attachment to do the job of a heavy duty tool Don t use tool for purpose not intended for example Don t use a circular saw for cutti...

Page 3: ... have repaired by an authorized service center Stay constantly aware of cord location 26 INSPECT EXTENSION CORDS PERIODICALLY and replace if damaged 27 KEEP HANDLES DRY CLEAN AND FREE FROM OIL AND GREASE Always use a clean cloth whencleaning Neverusebrakefluids gasoline petroleum basedproductsorsolventstocleanyour tool 28 STAY ALERT Watch what you are doing and use common sense Do not operate tool...

Page 4: ...ial voltage drop will cause a loss of power and the motor will overheat If your tool does not operate when plugged into an outlet double check the power supply Fig 1 WARNING WARNING DO NOT ALLOW FAMILIARITY WITH YOUR SANDER TO MAKE YOU CARELESS REMEMBER THAT A CARELESS FRACTION OF A SECOND IS SUFFICIENT TO INFLICT SEVERE INJURY The operation of any sander can result in foreign objects being thrown...

Page 5: ...ERS CLEAR OF MOVING SANDING BELT FRONT IDLER PULLEY AND DRIVE ROLLER ASSEMBLY FAILURE TO DO SO WILL RESULT IN THE SANDING OF YOUR HANDS OR FINGERS See Figure 3 WARNING DO NOT LET YOUR FINGERS REST OVER THE FRONT OR RIGHT EDGE OF THE SANDER IF THE SANDING BELT WERE TO RUN OFF OR IF IT WERE NOT PROPERLY ADJUSTED YOUR FINGERS COULD COME IN CONTACT WITH THE MOVING SANDING BELT RESULTING IN POSSIBLE SE...

Page 6: ...T BAG PROPERLY INSTALLED SAWDUST BEING THROWN INTO YOUR FACE AND EYES COULD RESULT IN POSSIBLE SERIOUS INJURY INSTALLING AND ADJUSTING SANDING BELT DISCONNECT SANDER FROM POWER SUPPLY WHILE ASSEMBLING PARTS OR MAKING ADJUSTMENTS To release the sanding belt lift tension release lever straight up as shown in figure 5 When sufficient force is exerted the spring will be compressed allowing the pulley ...

Page 7: ...OF YOUR BODY COMING IN CONTACT WITH MOVING BELT COULD RESULT IN SERIOUS INJURY DO NOT WEAR LOOSE CLOTHING OR JEWELRY WHEN OPERATING YOUR SANDER THEY COULD GET CAUGHT IN MOVING PARTS AND FOREIGN OBJECTS COULD GET THROWN AWAY FROM SANDER CAUSING INJURY TO OPERATE Clamp or otherwise secure the work to prevent it from moving under your sander WARNING UNSECUREDWORKCOULDBETHROWN BACK TOWARD OPERATOR CAU...

Page 8: ... 6 Reassemble belt cover and screws CAUTION NEVER ATTEMPT TO OPERATE YOUR SANDERWITHOUTBELTCOVERINPLACE FAILURE TO DO SO COULD RESULT IN POSSIBLE SERIOUS INJURY Fig 11 Fig 10 CAUTION Keep extension cords away from the sanding area and position the cord so that it will not get caught on lumber tools etc during sanding WARNING CHECK EXTENSION CORDS BEFORE EACH USE IF DAMAGED REPLACE IMMEDIATELY NEVE...

Page 9: ...ke lead connections to the new switch by positioning power cord leads in place and tightening the two screws on switch body Push motor leads as far as possible into the switch lead receptacles Pull on leads to check lead connections with lead receptacles 5 Position the switch in place and arrange the wiring in the handle so that it will not be pinched or contact screws when the handle cover and sc...

Page 10: ...50 1 1 2 3 4 5 6 7 8 9 11 12 13 14 15 16 17 18 19 20 21 22 23 38 39 40 41 42 43 44 45 46 47 48 47 49 50 51 52 53 54 55 56 57 58 59 28 60 61 28 62 63 64 65 66 67 68 69 31 61 70 6 10 12 75 71 72 73 74 25 26 27 28 29 30 31 32 33 34 35 36 37 15 15 14 24 24 ...

Page 11: ...1 39 Idler Roller Shaft 1 40 Yoke Assembly Includes Key No 32 1 41 Release Lever Assembly 1 42 Washer 1 43 Screw 10 32 x 1 2 in Pan Hd 1 44 75 mm x 534 mm Sanding Belt Complete Assortment Available at Your Nearest Catalog Order or Retail Store 1 45 Glamor Plate 1 46 Screw 10 32 x 7 8 in Pan Hd T F 2 47 Bushing 2 48 Torsion Spring 1 49 Tracking Knob 1 50 Spring 1 51 Washer 1 52 Gear Housing w Beari...

Page 12: ...on Be sure to provide all pertinent facts when you call or visit MODEL NO The model number of your Tool will be found on a plate attached to the motor housing HOW TO ORDER REPAIR PARTS WHEN ORDERING REPAIR PARTS ALWAYS GIVE THE FOLLOWING INFORMATION MODEL NUMBER PART DESCRIPTION B850 NAME OF ITEM 3 Dustless Belt Sander All parts listed may be ordered from any Ryobi Authorized Service Center or oth...

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