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Page 6

OPERATION

Fig. 4

Fig. 5

Fig. 6

WARNING: ALWAYS WEAR SAFETY GOGGLES OR
SAFETY GLASSES WITH SIDE SHIELDS WHEN
OPERATING YOUR SANDER. IF THE SANDING
OPERATION IS DUSTY, ALSO WEAR A FACE OR
DUST MASK. FAILURE TO DO SO COULD RESULT IN
DUST OR LOOSE PARTICLES BEING THROWN INTO
YOUR EYES, RESULTING IN POSSIBLE SERIOUS
INJURY.

INSTALLING DUST BAG

See Figure 4.

DISCONNECT SANDER FROM POWER SUPPLY WHILE
ASSEMBLING PARTS OR MAKING ADJUSTMENTS.

TO INSTALL:

1. Fit opening in dust bag retainer over dust exhaust hole

on blower cover.

2. Slide dust bag retainer in the direction of the arrow as

shown in Figure 4.

3. Dust bag is secure when it fits snugly on blower cover.

4. For most efficient operation, empty dust bag when half

full.

WARNING: TO PREVENT THE POSSIBILITY OF
SAWDUST BEING THROWN INTO YOUR FACE
AND EYES, NEVER ATTEMPT  TO USE YOUR
S A N D E R   W I T H O U T   D U S T   B A G   P R O P E R L Y
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 to lock in a rear
position. This frees the sanding belt so it can be removed.
Install new belt. 

See Figure 6. Roughly align the belt to its

correct position, then release tension on pulley. Release
tension by lowering tension release lever as shown in Figure
5. The pulley will snap back into operating position.

WARNING: KEEP HANDS AND FINGERS CLEAR
O F   F R O N T   I D L E R   P U L L E Y   A N D   S P R I N G
MECHANISM AT ALL TIMES. FAILURE TO DO SO
COULD RESULT IN THEM GETTING PINCHED,
RESULTING IN POSSIBLE SERIOUS INJURY.

.

DUST BAG RETAINER

DUST BAG

BLOWER COVER

LOWER TENSION RELEASE LEVER TO SECURE
SANDING BELT

LIFT TENSION RELEASE LEVER TO REMOVE
SANDING BELT

SANDING BELT

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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