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Model

Motor

Motor

Pad Dia.

Sound

Maximum Air Flow

Hose I.D. Size

Air Inlet

Weight

Length

Height

Number

hp (W)

RPM

Inch (mm)

Level

CFM/SCFM (LPM)

Inch or  (mm)

Thread

Pound (kg)

Inch (mm)

Inch (mm)

10784

.7 (522)

2,500

8 (177)

87 dB(A)

3/27 (765)

3/8 or 10

1/4" NPT

6.4 (2.9)

14-3/8 (366) 5-13/16 (148)

10786

.7 (522)

2,500

8 (177)

87 dB(A)

3/27 (765)

3/8 or 10

1/4" NPT

6.4 (2.9)

14-3/8 (366) 5-13/16 (148)

Additional Specifications: Air Pressure 90 PSIG (6.2 Bar)

Sound Level is the pressure measurement according to the method outlined in ISO regulation ISO-15744

Maintenance Instructions

Important:

A preventative maintenance program is recommended whenever portable power tools are used. The program should include inspection of air

supply lines, air line pressure, proper lubrication and repair of tools. Refer to ANSI B186.1 for additional maintenance information.

Use only genuine Dynabrade replacement parts to insure quality. To order replacement parts, specify 

Model#

Serial#

and 

RPM

of your air tool.

It is strongly recommended that all Dynabrade rotary vane air tools be used with a Filter-Regulator-Lubricator to minimize the possibility of misuse due
to unclean air, wet air or insufficient lubrication. Dynabrade recommends the following: 

11405

Air Filter-Regulator-Lubricator (FRL) – Provides accurate

air pressure regulation and two stage filtration of water contaminants. Operates 40 SCFM @ 100 PSIG with 3/8" NPT female ports.

Apply 3 plunges of 95542 Grease through grease fitting located on side of angle head with 95541 Grease Gun after every 100 Hours of use.

Dynabrade recommends one drop of air lube per minute for each 20 SCFM (example: if the tool specification states 40 SCFM, set the drip rate on the 
filter-lubricator to 2 drops per minute). Dynabrade Air Lube (P/N 

95842

: 1 pt 473 ml) is recommended.

Routine Preventative Maintenance:

Check the free speed of 8" Random Orbital Polisher by using a tachometer on regular basis. 

BEFORE MOUNTING AN ACCESSORY, after all tool repairs and whenever a 8" Random Orbital Polisher is issued for use, check tool RPM 
(speed) with tachometer with air pressure set at 90 PSIG while the tool is running. If tool is operating at a higher speed than the RPM marked on the 
tool housing, or operating improperly, the tool must be serviced and corrected before use.

Mineral spirits are recommended when cleaning the tool and parts. Do not clean tool or parts with any solvents or oils containing acids, esters, 
ketones, chlorinated hydrocarbons or nitro carbons.

DO NOT clean or maintain tools with chemicals that have a low flash point (example: WD-40

®

).

A Motor Tune-Up Kit (P/N 

98224

) is available which includes high wear and medium wear motor parts.

Air tool labels must be kept legible at all times, if not, reorder label(s) and replace. User is responsible for maintaining specification information i.e.:
Model #, S/N, and RPM. (See Assembly Breakdown)

Blow air supply hose out prior to initial use.

Visually inspect air hoses and fittings for frays, visible damage and signs of deterioration. Replace damaged or worn components.

Refer to Dynabrade's Warning/Safety Operating Instructions Tag (Reorder No. 

95903

) for safety information.

After maintenance is performed on tool, add a few drops of Dynabrade Air Lube (P/N 

95842

) to the air line and start the tool a few times to lubricate air motor. 

Check for excessive tool vibration.

Handling and Storage:

Tool Resting Position:

DO NOT rest tool on pad. (See Tool Resting Position Diagram)

Use of tool rests, hangers and/or balancers is recommended.

Protect tool inlet from debris (see Notice below).

DO NOT carry tool by air hose, or near the tool throttle lever.

Protect abrasive accessories from exposure to water, solvents,
high humidity, freezing temperature and extreme temperature changes.

Store accessories in protective racks or compartments to prevent damage.

Notice

All Dynabrade motors use the highest quality parts and materials available and are machined to exacting tolerances. The failure of quality pneumatic motors
can most often be traced to an unclean air supply or the lack of lubrication. Air pressure easily forces dirt or water contained in the air supply into motor
bearings causing early failure. It often scores the cylinder walls and the rotor blades resulting in limited efficiency and power. Our warranty obligation is
contingent upon proper use of our tools and cannot apply to equipment which has been subjected to misuse such as unclean air, wet air or a lack of
lubrication during the use of this tool.

One Year Warranty

Following the reasonable assumption that any inherent defect which might prevail in a product will become apparent to the user within one year from the
date of purchase, all equipment of our manufacture is warranted against defects in workmanship and materials under normal use and service. We shall
repair or replace at our factory, any equipment or part thereof which shall, within one year after delivery to the original purchaser, indicate upon our
examination to have been defective. Our obligation is contingent upon proper use of Dynabrade tools in accordance with factory recommendations,
instructions and safety practices. It shall not apply to equipment which has been subject to misuse, negligence, accident or tampering in any way so as to
affect its normal performance. Normally wearable parts such as bearings, contact wheels, rotor blades, etc., are not covered under this warranty.

Machine Specifications

3

CORRECT Resting Position

INCORRECT Resting Position

Summary of Contents for 10784

Page 1: ...be worn at all times eye protection to conform to ANSI Z87 1 WARNING Respiratory protection to be used when exposed to contaminants that exceed the applicable threshold limit values required by law WARNING Practice safety requirements Work alert have proper attire and do not operate tools under the influence of alcohol or drugs WARNING Ear protection to be worn when exposure to sound exceeds the l...

Page 2: ... After installing the accessory before testing or use and or after assembling tool the 8 Random Orbital Polisher must be started at a reduced speed to check for good balance Gradually increase tool speed DO NOT USE if tool vibration is excessive Correct cause and retest to insure safe operation Release the throttle lever in case of an interruption of the energy supply Ensure that self fixing acces...

Page 3: ...dium wear motor parts Air tool labels must be kept legible at all times if not reorder label s and replace User is responsible for maintaining specification information i e Model S N and RPM See Assembly Breakdown Blow air supply hose out prior to initial use Visually inspect air hoses and fittings for frays visible damage and signs of deterioration Replace damaged or worn components Refer to Dyna...

Page 4: ... 35 18567 Retaining Ring 36 18574 O Ring 37 18576 Gasket 38 18577 Spacer 39 18578 Gasket 40 18579 Valve Housing 41 18559 Washer 4 42 18580 Screw 4 43 18601 Grip 44 18581 Valve Stem 45 18582 Safety Throttle Lever 46 18583 Pin 47 18584 Valve Seat 48 18585 Valve Pin 49 18586 Valve 50 18587 Valve Spring 51 18588 Gasket 52 18589 Exhaust Retainer 53 18592 Exhaust Bushing 54 18590 O Ring 55 18591 Inlet B...

Page 5: ...ral times The 18568 Bearing will slide out of the 18569 Front Bearing Plate 10 Use a 3 16 dia flat end drive punch as a press tool and the arbor press to push the 18594 Pinion Gear out of the 18568 Bearing 11 Use a 3 16 dia flat end drive punch as a press tool and the arbor press to push the 18595 Rotor out of the front 18555 Bearing Use the 96213 Bearing Removal Tool and the arbor press to push t...

Page 6: ...small amount of the 95542 Grease to the bevel gear and pinion 7 Install the 18557 Wave Washer and use the retaining ring pliers to install the 18556 Retaining Ring 8 Place the threaded portion of the spindle on the tool plate of the arbor press and use the raised center portion of the 96240 Bearing Press Tool to press the 18555 Bearing onto the spindle 9 Install the 18554 Spacer into the 18552 Hou...

Page 7: ... 18555 Bearing 3 T 23 18554 Spacer 1 X 24 18552 Housing 1 X 25 18553 Handle 1 X 26 18551 Plug 1 X 27 18594 Pinion Gear 1 X 28 18568 Bearing 1 T 29 18569 Front Bearing Plate 1 X 30 18570 Blade 4 pkg 4 T 31 18595 Rotor 1 X 32 18571 Cylinder 1 X 33 18572 Pin 1 X 34 18573 Rear Bearing Plate 1 X 35 18567 Retaining Ring 1 D 36 18574 O Ring 1 T 37 18576 Gasket 1 T 38 18577 Spacer 1 X 39 18578 Gasket 1 T ...

Page 8: ...help maintain and repair motor 53147 Top Mount Handle Assembly Allows side handle to be centered over the top of the working end of the tool 90082 Natural Sheepskin Polishing Pad Dynabrade Air Lube Formulated for pneumatic equipment Absorbs up to 10 of its weight in water Prevents rust and formation of sludge Keeps pneumatic tools operating longer with greater power and less down time 95842 1pt 47...

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