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 any abrasives.
2.
Secure air tool in padded vise. Roll back
53175
Rubber Collar.
3.
With an adjustable pin wrench, remove
53186
Planetary Housing by turning counter-clockwise.
4.
Pull
53181
Adapter and first planetary carrier assembly from
53186
Planetary Housing.
5.
Press planetary carrier assembly from rear
02552
Bearing. Remove ring gear and gears from
53180
Planetary Carrier.
6.
Secure planetary carrier in vise and remove
53181
Adapter. Press carrier from front
02552
Bearing. Remove
53179
Spacer.
7.
Grab onto pinion and pull motor assembly from motor housing.
8.
Press
53178
Rotor from
01721
Rear Bearing Plate. Press
02649
Rear Bearing from rear bearing plate.
9.
Remove cylinder and rotor blades from rotor.
10.
Secure rotor in vise and remove pinion from rotor by inserting a 3mm drift pin through hole in pinion and twist off (right hand threads).
11.
Press pinion and rotor through
53174
Front Bearing and
53171
Front Bearing Plate.
Motor disassembly complete.
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 sintered muffler and felt muffler.
5.
Remove
01564
Air Control Ring from valve body. Using needle nose pliers, remove
01468
Spring, tip valve and 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 Reassembly:
Important:
Be sure parts are clean and in good repair before reassembly
.
Follow all grease, oil, and torque specifications.
1.
Place
53171
Front Bearing Plate onto front end of
53178
Rotor (threaded end). Press
53174
Front Bearing onto rotor and front bearing plate.
2.
Secure rotor in padded vise with threaded spindle facing up. Apply one drop of #271 Loctite® (or equivalent) to threads of rotor. Using a 3mm drift pin,
tighten pinion onto rotor (torque 17.0 N•m/150 in. - lbs.).
3.
Apply one drop of #609 Loctite® (or equivalent) to outer race of
02649
Rear Bearing and slip bearing into bearing plate.
4.
Install well lubricated blades into rotor slots. Dynabrade recommends using their
95842
Dynabrade Air Lube.
5.
Install cylinder over rotor with air inlet hole in cylinder wall facing away from front bearing plate.
6.
Press
01721
Rear Bearing plate on to rotor. Be sure that pin and air inlet hole in cylinder line up with air inlet hole and pin hole in bearing plate.
7.
Install motor assembly into motor housing. Place
53179
Spacer on top of motor.
8.
Press Front
02552
Bearing onto front end of first
53180
Planetary Carrier.
9.
Install gears,
04026
Bearings and
53182
Gear Shafts onto planetary carrier.
10.
Slip
53191
Ring Gear over gears and press rear
02552
Bearing onto planetary carrier.
11.
Apply one drop of #271 Loctite® to threads of
53181
Adapter. Install adapter onto planetary carrier (torque 17.0 N•m/150 in. - lbs.).
12.
Install
53186
Planetary Housing onto housing to secure motor (torque 28 N•m/250 in. - lbs.).
13.
Roll back
53175
Collar and install abrasives.
Motor Reassembly Complete.
Valve Body Reassembly:
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 upwards. 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 towards tip valve).
4.
Assemble sintered muffler and felt muffler together and place 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.
8.
Apply Hernon #940 PST Pipe Sealant to threads of
94523
Inlet Adapter and install entire muffler assembly onto valve body (torque 23.0 N•m/200 in. - lbs.).
9.
Replace air fitting. Secure inlet adapter with a wrench before tightening air fitting. Install throttle lever and
01017
Pin.
Tool Assembly is complete. Please allow 30 minutes for adhesives to cure before operating tool.
Important:
Motor should now be tested for proper operation at 90 PSI. If motor does not operate properly or operates at a higher RPM than marked on the
tool, the tool should be serviced to correct the cause before use. Before operating, place 2-3 drops of Dynabrade Air Lube (P/N
95842
) directly into air inlet
with throttle lever depressed. Operate tool for 30 seconds to determine if tool is operating properly and to allow lubricating oils to properly penetrate motor
Loctite® is a registered trademark of Loctite Corp.
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