Dynabrade 40330 Disassembly & Assembly Instructions

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.

1.

Use a 9/64" hex key to loosen the

95311

Screw. Remove the motor from the belt housing.

2.

Carefully hold the

01447

Housing in a vise with aluminum 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.

3.

Use the

50971

Lock Ring Wrench to remove the motor lock ring. Turn counterclockwise.

Remove the exhaust control spacer.

Pull the motor out of the housing.

96346 Bearing Separator

4.

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.

96211 Bearing Removal Tool

96346 Bearing Separator

5.

Use the

96211

Bearing Removal Tool and the arbor press to remove the

01015

Bearing from the rear bearing plate.

6.

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.

Motor Disassembly Completed.

Clean and inspect parts before assembling.

Assembly Instructions - 0.5 hp. Dynafile II

.003" (~0.80 mm) shim thickness

01010 Spacer

Motor Assembly:

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.

.001"-.0015"

(~0.03-0.04 mm)

2.

By hand, install the

04081

Rotor Nut. Pull the front bearing plate forward to take movement 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.

T to 17 N•m/~150 in. lbs.

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.)

OIL

4.

Apply the

95842

Dynabrade Air Lube, 10W/NR or equivalent to the

01011

Vanes and install them into the rotor.

96241 Bearing Press Tool

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.

6.

Install the cylinder and rear bearing plate so that the air inlet openings line-up with each other.

96241 Bearing Press Tool

Just Touch

7.

Use the

RAISED INSIDE DIAMETER of the

96241

Bearing Press Tool and 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.

8.

Install the motor assembly.

Loctite #567

T to 34 N·m/~300 in. lbs.

9.

Carefully fasten the

01447

Housing in a vise with aluminum or bronze jaws so that the rotor spindle is pointing up.

Notice: Over tightening vise will damage housing.

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.

Use a 3/16" hex key, and pliers to tighten drive wheel.

10.

Insert a 3/16" hex key through the drive 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 9/64" hex key.

11.

Install the air motor into the housing.

Use a 9/64" hex key 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.