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IMPORTANT OPERATING,

MAINTENANCE AND SAFETY

INSTRUCTIONS:

Carefully read all instructions before operating or servicing any

Dynabrade

Abrasive Power Tool.

WARNING: Hand, wrist and arm injury may result from repetitive work

motion and overexposure to vibration.

IMPORTANT: All Dynabrade Rotary Vane air tools must be used with a

Filter-Regulator-Lubricator to maintain all warranties.

OPERATING INSTRUCTIONS:

WARNING: Eye, face, respiratory, sound and body protection must be worn

while operating power tools. Failure to do so may result in serious

injury or death. Follow safety procedures posted in workplace.

1. With power source disconnected from tool, securely fasten

abrasive/accessory on tool.

2. Install air fitting into inlet bushing of tool. IMPORTANT: Secure inlet bush-

ing of tool with a wrench before attempting to install the air fitting

to avoid damaging valve body housing.

3. Connect power source to tool. Be careful not to depress

throttle lever in the process.

4. Check tool speed with tachometer. If tool is operating at a higher

speed than the RPM marked on the tool or operating improperly,

the tool should be serviced to correct the cause before use.

MAINTENANCE INSTRUCTIONS:

1. Check tool speed regularly with a tachometer. If tool is operating at

a higher speed than the RPM marked on the tool, the tool should be

serviced to correct the cause before use.

2. Some silencers on air tools may clog with use.

Clean and replace as required.

3. All Dynabrade Rotary Vane air motors should be lubricated.

Dynabrade recommends one drop of air lube per minute for each 10

SCFM (example: if the tool specifications state 40 SCFM, set the drip rate

of your filter-lubricator at 4 drops per minute). Dynabrade Air Lube

(P/N 95842: 1 pt. 473 ml.) is recommended.

4. 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 Line Filter-Regulator-

Lubricator—Provides accurate air pressure regulation, two-stage filtration

of water contaminants and micro-mist lubrication of pneumatic

components. Operates 40 SCFM @100 PSIG has 3/8" NPT female ports.

5. Lubricate planetary gears through the grease fitting with 2 plunges for

every 50 hours of use, to achieve maximum gear life (order 95542 Grease

and 95541 Gun).

6. Use only genuine Dynabrade replacement parts. To reorder replacement

parts, specify the Model #, Serial # and RPM of your machine.

7. A Motor Tune-Up Kit (P/N 96174) is available which includes assorted

parts to help maintain motor in peek operating condition. Please refer to

Dynabrade's Preventative Maintenance Schedule for a guide to expectant

life of component parts.

8. Mineral spirits are recommended when cleaning the tool and parts.

Do not clean tool or parts with any solvents or oils containing acids,

esters, keytones, chlorinated hydrocarbons or nitro carbons.

SAFETY INSTRUCTIONS:

PRODUCTS OFFERED BY DYNABRADE

SHOULD NOT BE CONVERTED OR OTHERWISE

ALTERED FROM ORIGINAL DESIGN WITHOUT

EXPRESSED WRITTEN CONSENT FROM DYNABRADE, INC.

• IMPORTANT: User of tool is responsible for following accepted safety

codes such as those published by the American National Standards

Institute (ANSI).

• Operate machine for one minute before application to workpiece to

determine if machine is working properly and safely before work begins.

•

Always disconnect power supply before changing abrasive/accessory or

making machine adjustments.

•

Inspect abrasives/accessories for damage or defects prior to

installation on tools.

•

Please refer to Dynabrade's Warning/Safety Operating Instructions Tag

(Reorder No. 95903) for more complete safety information.

•

WARNING: Hand, wrist and arm injury may result from repetitive work,

motion and overexposure to vibration.

NOTICE

All Dynabrade motors use the highest quality parts and metals 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.

MOTOR ASSEMBLY/DISASSEMBLY

INSTRUCTIONS

Important: Manufacturer's warranty is void if tool is disassembled before

warranty expires.

NOTICE: Dynabrade strongly recommends the use of their 52296 Repair

Collar (sold separately) during assembly/disassembly activities.

Failure to use this collar will highly increase the risk of damage

to the valve body of this tool. Please refer to parts breakdown for

part identification.

MOTOR DISASSEMBLY:

1. Disconnect tool from power source.

2. Secure air tool in vise using 52296 Repair Collar. Remove back-up pad.

3. With an adjustable pin wrench or 50971 Lock Ring Tool, remove 50781

Rear Exhaust Cover by turning counter-clockwise.

4. Remove 50784 Set Screw and pull 50782 Adapter and planetary

carrier assembly from 50776 Housing.

5. Press planetary carrier assembly from rear 54552 Bearing.

Remove ring gear and gears from 50786 or 50787 Planetary Carrier.

6. Secure planetary carrier in vise and remove 50782 Adapter.

Press carrier from front 54552 Bearing.

7. Grab onto pinion and pull motor assembly from motor housing.

Remove 50778 Spacer.

8. Press 54553 or 54554 Rotor from 02673 Rear Bearing Plate. Press 02696

Rear Bearing from rear bearing plate, remove 02679 Shield.

9. Remove cylinder and rotor blades from rotor.

10. Press 54553 or 54554 Rotor through 02649 Front Bearing and 01478

Front Bearing Plate.

MOTOR DISASSEMBLY COMPLETE.

VALVE BODY DISASSEMBLY:

1. Position valve body in vise using 52296 Repair Collar w/air inlet facing up.

2. Remove air fitting by securing 94523 Inlet Adapter with a wrench

and twist air fitting from inlet adapter.

IMPORTANT: 94523 Inlet Adapter must be secured before attempting

to removeair fitting to avoid damaging valve body housing.

3. Remove 94523 Inlet Adapter.

4. Remove 95711 Retaining Ring from inlet adapter and separate

94521 Muffler Base from 94522 Muffler Cap. Remove sintered

muffler and felt muffler.

5. Remove 01564 Air Control Ring from valve body. Using needle nose

pliers, remove 01468 Spring, 01472 Tip valve and 01464 Seal.

6. Using a 2.5mm drift pin, tap 12132 Pin from housing and remove

throttle lever.

7. Remove 95558 Retaining Ring. Push 01469 Regulator from valve body

and remove o-rings.

VALVE DISASSEMBLY COMPLETE.

MOTOR ASSEMBLY:

IMPORTANT: Be sure parts are clean and in good repair before

assembling. Follow all grease, oil, and torque specifications.

1. Slip 01479 Spacer onto 54553 or 54554 Rotor.

2. Place a .002" Shim into 01478 Front Bearing Plate for initial spacing.

Then slip 02649 Bearing into 01478 Front Bearing Plate.

Press assembly onto rotor.

3. Check the clearance between rotor and bearing plate by using a .001"

feeler gauge. Clearance should be at .001" to .0015". Adjust clearance by

repeating steps 1-3 changing shims as required.

4. Once proper rotor gap clearance is achieved, install lubricated blades into

rotor slots, (use 95842 Dynabrade Air Motor Oil or equivalent).

5. Install 01476 Cylinder so it rests against the 01478 Front Bearing Plate,

(make sure inlet holes of cylinder line up with inlet holes in 02673 Rear

Bearing Plate.

6. Press 02696 Bearing into 02673 Rear Bearing Plate. Press this

assembly onto rotor. Important: Fit must be snug between bearing plates

and cylinder. If too tight, rotor will not turn freely. Rotor must then be lightly

tapped at press end so it will turn freely while still maintaining a snug fit. A

loose fit will not achieve the proper preload or motor bearings. Next, place

a small amount of grease on the 02696 Bearing and stick 02679 Shield

against the bearing.

7. Secure housing in vise using 52296 Repair Collar or padded jaws so that

motor cavity points upward.

Install motor assembly into housing, making sure motor drops all the way

into housing.

9. Install 50778 Spacer so that flat side rests against 02649 Bearing.

10. Press front 54552 Bearing onto front end of 50786 or

50787 Planetary Carrier.

11. Hold planetary carrier in a soft jaw vise and apply one drop of #271

Loctite

to the threads of 50782 Adapter. Install adapter onto planetary