0.4 hp Motor - Dynafile II

Models: 40352, 40353
Revised: November 20th, 2013


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

Shut off the air supply and depress throttle lever to deplete the remaining air. Carefully disconnect the tool from the air supply hose. Remove the belt housing cover and abrasive belt. Use the Special Repair Tools designed for the disassembly and assembly of this motor.

Disassembly of Motor:

Step 1

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

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Step 2

Carefully fasten the 01546 Housing in a vise with aluminum
or bronze jaws so that the drive wheel is pointing up. Use the 96076, 12 mm Wrench to hold the 04117 Adapter stationary. Remove the drive wheel by hand, or use groove pliers.
Turn counterclockwise.

Notice: Over tightening vise will damage housing.
Repair Collar 96461 (designed to protect the
01546 Housing) is available upon order.

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Step 3

Use the 50971 Lock Ring Tool or an adjustable 3 mm pin spanner wrench to remove the 04116 Exhaust Cover.
Turn counterclockwise.

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Step 4

Loosen the vise and carefully pull the motor out of the
01546 Housing. Remove the 02679 Shield.

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Step 5

Fasten the 96346 Bearing Separator (2") around the
01476 Cylinder
. Place the bearing separator in the
96232 Arbor Press (#2) with the 04117 Adapter pointing down. Use a 3/16" or 5 mm diameter flat end drive punch as a press tool and push the rotor out of the 02696 Bearing.

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Step 6

Use the 96210 Bearing Removal Tool and the arbor press to remove the 02696 Bearing from the rear bearing plate.

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Step 7

Fasten the rotor in the vise with aluminum or bronze jaws so that the 04117 Adapter is pointing up. Use the 96076, 12 mm, or an adjustable wrench to remove the 04117 Adapter.
Turn counterclockwise. Remove the bearing, plate, shims
and the 01479 Spacer.

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Disassembly of Motor Complete