Dynabrade 40320 Disassembly & Assembly Instructions Download Page 1

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Disassembly Instructions - 0.5 hp. Dynafile II

Models:

40320, 40321, 40324, 40326, 40330, 40335

Important:

Use these instructions along with the tool parts page or manual.

Notice:

Shut off the air supply and depress throttle lever to deplete remaining air.

• Carefully disconnect the tool from the air supply hose. • Remove the abrasive belt and contact

arm assembly. • Use the Special Repair Tools designed for the disassembly and assembly of

this motor.

Motor Disassembly:

Use a 9/64" hex key to loosen the

95311

Screw. Remove the motor from the belt housing.

Use a 9/64" hex key to
loosen the 95311 Screw.

Summary of Contents for 40320

Page 2: ...um or bronze jaws so that the drive wheel is pointing up Notice Over tightening vise will damage housing Insert a 3 16 hex key through drive wheel and into the end of the 01120 Rotor Use groove pliers to grasp the drive wheel and remove Turn counterclockwise ...

Page 3: ...3 Use the 50971 Lock Ring Wrench to remove the motor lock ring Turn counterclockwise Remove the exhaust control spacer ...

Page 4: ...Pull the motor out of the housing ...

Page 5: ...ound the 01013 Cylinder Place the separator and the motor in the 96232 Arbor Press 2 so that the rotor spindle is pointing down Use a 3 16 or 5 mm diameter flat end drive punch to push the rotor out of the 01015 Bearing 96346 Bearing Separator ...

Page 6: ...5 Use the 96211 Bearing Removal Tool and the arbor press to remove the 01015 Bearing from the rear bearing plate 96346 Bearing Separator 96211 Bearing Removal Tool ...

Page 7: ... aluminum or bronze jaws and use an adjustable wrench to remove the 04081 Rotor Nut Turn counterclockwise Remove the 01007 Bearing 01008 Bearing Plate shims and 01010 Spacer Motor Disassembly Completed Clean and inspect parts before assembling ...

Page 8: ...ly 1 Install the 01010 Spacer onto the rotor Install 003 0 80 mm shim thickness into the 01008 Front Bearing Plate Install the 01007 Bearing into the front bearing plate Install the bearing and plate onto the rotor 003 0 80 mm shim thickness 01010 Spacer ...

Page 9: ...ovement out of the bearing Check the clearance between the rotor and plate Use a 001 0 03 mm thick feeler gauge Notice The clearance should be 001 0015 0 03 0 04 mm If the rotor plate clearance needs adjustment repeat steps 1 and 2 Remove or add shims as required 001 0015 0 03 0 04 mm ...

Page 10: ...3 Use a 17 mm socket or crowfoot and a torque wrench to tighten the 04081 Rotor Nut T to 17 N m 150 in lbs T to 17 N m 150 in lbs ...

Page 11: ...4 Apply the 95842 Dynabrade Air Lube 10W NR or equivalent to the 01011 Vanes and install them into the rotor OIL ...

Page 12: ...5 Use the RAISED OUTSIDE DIAMETER of the 96241 Bearing Press Tool and the arbor press to install the 01015 Bearing Notice Press the bearing all the way into the plate 96241 Bearing Press Tool ...

Page 13: ...6 Install the cylinder and rear bearing plate so that the air inlet openings line up with each other ...

Page 14: ...d the arbor press to install the bearing and plate Important Press the bearing and plate down until the rear bearing plate just touches the 01013 Cylinder Doing so will produce a close fit between the bearing plates and the cylinder Just Touch 96241 Bearing Press Tool ...

Page 15: ...8 Install the motor assembly ...

Page 16: ...sing As needed install fabric silencer around the exhaust control spacer and o rings around the lock ring Apply Loctite 7649 Primer to the thread of the lock ring Apply a small amount of Loctite 567 or equivalent to the lock ring Use the 50971 Lock Ring Tool and a torque wrench to install the lock ring T to 34 N m 300 in lbs T to 34 N m 300 in lbs Loctite 567 ...

Page 17: ...e wheel and into the end of the 01120 Rotor to hold it stationary Use groove pliers to tighten the drive wheel IMPORTANT Use a tachometer to check motor speed and to verify proper operation Use a 3 16 hex key and pliers to tighten drive wheel ...

Page 18: ...to fasten the motor with the 95311 Screw and 40029 Cam Lock Motor Assembly Completed Notice For belt housing contact arm and valve assemblies refer to the exploded view and the additional instructions contained in the tool parts page or manual Use a 9 64 hex key ...