0.5 hp Motor - Dynafile® II

Models: 40320, 40321, 40324, 40326, 40330, 40335
Revised: April. 5th, 2013


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

Notice: Shut off the air supply and depress throttle lever to dissipate the 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.

Disassemby of Dynafile® II

Step 1

Use a 9/64" hex key to loosen the 95311 Screw.
Remove the motor from the belt housing.

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Step 2

Carefully hold the 01447 Housing in a vise with aluminum or bronze jaws so that the drive wheel is pointing up. 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.

Notice: Over tightening vise will damage housing.

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Step 3

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

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Step 4

Pull the motor out of the housing.

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Step 5

Fasten the 96346 Bearing Separator (2") around 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.

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Step 6

Use the 96211 Bearing Removal Tool and the arbor press to remove the 01015 Bearing from the rear bearing plate.

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Step 7

Fasten the 01120 Rotor in the vise with 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. Clean and inspect parts before assembling.

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Disassembly of Dynafile® II Complete