Dynabrade Dynastraight 13201, Operating, Maintenance And Safety Instructions

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Disassembly/Assembly Instructions - Dynastraight ®
Important: Manufacturer’s warranty is void if tool is disassembled before warranty expires.
Please refer to parts breakdown for part identification.
Motor Disassembly:
1. Disconnect tool from power source. Remove arbor assembly.
2. Secure air tool in padded vise.
3. With an adjustable pin wrench, remove 53186 Planetary Housing by turning counterclockwise.
4. Remove 04014 Set Screw and 53175 Rubber Collar, pull planetary carrier assembly from 53186 Planetary Housing.
5. Press planetary carrier assembly from rear 02552 Bearing. Remove ring gear and gears from 53165 Planetary Carrier.
6. Secure planetary carrier in vise and remove 04032 Spindle Nut. Press carrier from front 02552 Bearing.
7. Grab onto pinion and pull motor assembly from motor housing.
8. Press 04017 or 04009 Rotor from 01721 Rear Bearing Plate. Press 02649 Rear Bearing from rear bearing plate.
9. Remove cylinder and rotor blades from rotor.
10. Press 04017 or 04009 Rotor through 01007 Front Bearing and 53183 Front Bearing Plate.
11. Remove 01007 Bearing and shims from 53183 Bearing Plate. Remove 01010 Spacer from rotor.
Valve Body Disassembly:
1. Position valve body in padded vise with 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 remove air 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 94528 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 01017 Pin from housing and remove throttle lever.
7. Remove 95558 Retaining Ring. Push 01247 Regulator from valve body and remove o-rings.
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 01010 Spacer onto 04017 or 04009 Rotor.
2. Place a .002 shim into 53183 Bearing Plate ( Note: 01121 Shim Pack contains .001 and .002 shims) and slip 01007 Bearing into plate.
3. Press 01007 , 53183 Bearing/Bearing Plate onto 04017 or 04009 Rotor.
4. Check the clearance between rotor and bearing plate by using .001 feeler gage, clearance should be at .001 to.0015. Adjust clearance by repeating steps
2-4 with a different shim if necessary.
5. Once proper rotor/plate clearance is achieved, install well-lubricated 01185 Blades into 04017 or 04009 Rotor. Dynabrade Air Lube P/N 95842 is
recommended for lubrication.
6. Install 01028 Cylinder so it rests against 53183 Bearing Plate. (Make sure that the air inlet opening faces away from the 53183 Bearing Plate).
7. Press 02649 Bearing into 01721 Rear Bearing Plate. Press these parts onto 04017 or 04009 Rotor, be sure that the line-up pin and the air inlet opening line
up with pin slots and air passage. Important: Fit must be snug between bearing plates and cylinder. If too tight, rotor will not turn free. Release, press
and repress assembly so that it turns free, while still maintaining a snug fit. A loose fit will not achieve the proper preload of the motor bearing.
8. Install motor assembly into motor housing, making sure that the bearing plate node fits into the notch inside the housing.
9. Press front 02552 Bearing onto front end of first 53165 Planetary Carrier.
10. Apply one drop of #271 Loctite
®
to threads of 04032 Nut and install nut onto planetary carrier (torque 17 N•m/150 in. - lbs.).
11. Install gears with needle bearings and 53182 Gear Shafts onto planetary carrier.
12. Slip 53191 Ring Gear over planetary gears making sure that the notches will line up with the set screw and the grease fitting. Then press rear 02552
Bearing onto planetary carrier.
13. Slide planetary gear assembly into 53186 Planetary Housing and apply a small amount of #567 Loctite
®
to the threads of 04014 Set Screw and install.
14. Install 53175 Rubber Collar onto 53186 Planetary Housing. Apply a small amount of #567 Loctite
®
to the threads of the motor housing and install 53186
Planetary Housing onto housing to secure motor (torque 28 N•m/250 in. - lbs.).
Motor Assembly Complete.
Valve Body Assembly:
1. Insert 01247 Regulator with o-rings and valve stem in place into valve body. Secure with 95558 Retaining Ring.
2. Secure valve body in padded vise with air inlet facing upward. Insert 01464 Seal.
3. Line up hole in valve stem with hole in housing (looking past brass bushing). Insert 01472 Tip Valve so that the metal pin passes through the hole in the
valve stem. Install 01468 Spring (small end toward tip valve).
4. Place felt muffler in 94522 Muffler Cap. Install 94521 Muffler Base onto muffler cap.
5. Install 95438 O-Ring into groove on muffler base. Place 95375 O-Ring and 94526 Spacer into recessed area of muffler cap.
6. Slip 94523 Inlet Adapter through muffler assembly and install 95711 Retainer Ring into groove on inlet adapter.
7. Install 01564 Air Control Ring into valve body housing.
(continued on next page)
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