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Disassembly/Assembly Instructions - 0.4 hp/7°/Vacuum Die Grinders

Important: The Dynabrade Pneumatic Power Tool Lifetime Warranty Policy does NOT cover normally wearable parts and products. Before servicing this

tool please contact Dynabrade Inc. or a Dynabrade Subsidiary for information regarding the Dynabrade Pneumatic Power Tool Lifetime Warranty Policy.

Notice: Special repair tooling referred to in these instructions can be ordered from Dynabrade. (See Page 8)

Disconnect the die grinder from the air supply.

Motor Disassembly:

1. Position the 52296 Repair Collar around the valve housing and secure the tool in a vise with the collet pointing up.

2. Loosen the clamp and remove the shroud.

3. Loosen the collet cap and remove the insert tool, cap and insert.

4. Use the 50971 Lock Ring Tool to remove the rear exhaust cover. Turn it counterclockwise.

5. Model 56723: Remove the air motor.

6. Model 56727: Use a 5/64" hex key to remove the 50784 Set Screw. Remove the planetary gear assembly, 50778 Spacer and air motor.

7. Fasten the 96346 Bearing Separator (2") around the portion of the 01476 Cylinder that is closest to the 02673 Rear Bearing Plate. Place the bearing separator

and the motor in the 96232 Arbor Press (#2) with the rotor shaft pointing down.

8. Use a 5/32" dia. flat end drive punch as a press tool to push the rotor out of the 02696 Bearing.

9. Remove the cylinder and vanes.

10. Use the 96210 Bearing Removal Tool and the arbor press to remove the 02696 Bearing from the 02673 Bearing Plate.

11. Model 56723: Secure the body of the rotor in a vise with aluminum or bronze jaws and remove the 01435 Collet Body. Turn it counterclockwise.

12. Remove the 01478 Front Bearing Plate, 02649 Bearing, shims, 01479 Spacer.

13. Model 56727: Position the 54553 Rotor in the arbor press with the pinion gear pointing up. Push the rotor out of the 02649 Bearing.

14. Remove the 01478 Front Bearing Plate, 02649 Bearing, shims, 01479 Spacer.

Motor Disassembly Complete.

Model 56727: Planetary Gear Disassembly

1. IMPORTANT: Position the 96346 Bearing Separator (2") with the FLAT SIDE facing the RING GEAR and the BEVELED SIDE toward the REAR 54552 Bearing.

Place the bearing separator and the planetary gear assembly in the 96232 Arbor Press (#2) with the 50782 Adapter pointing down.

2. Use a 5/16" flat end drive punch as a press tool to push the planetary carrier out of the rear 54552 Bearing.

3. Remove the ring gear, shafts, and planet gears.

4. Carefully secure the planetary carrier in a vise with aluminum or bronze jaws with the 50782 Adapter pointing up.

5. Use an adjustable wrench to remove the adapter from the planetary carrier. Turn it counterclockwise.

6. Use the arbor press and a 5/16" flat end drive punch as a press tool to push the planetary carrier out of the 54552 Bearing.

Planetary Gear Disassembly Complete.

Valve and Muffler Disassembly:

1. Position the 52296 Repair Collar around the valve housing and secure the tool in a vise so that the 94523 Inlet Adapter is pointing up.

2. Use a wrench to hold the inlet adapter stationary when removing the air fitting.

3. Remove the 94523 Inlet Adapter. Turn it counterclockwise.

4. Use the exploded view of the 94519/94520 Muffler in this tool manual for the order of disassembly and part number identification. Be careful; do not lose the air

control ring.

5. Use needle nose pliers to remove the 01468 Spring and the 01472 Tip Valve. Use a small screwdriver to remove the 01464 Seal.

6. Position the valve housing so that the 12132 Pin, 01462 Safety Throttle Lever, and 01449 Valve Stem can be removed.

7. Use retaining ring pliers to remove the 95558 Retaining Ring and then push the 01469 Speed Regulator Assembly out of the valve housing.

Valve Disassembly Complete.

Clean and inspect all parts before assembling.

Valve Assembly:

1. Install the 01469 Speed Regulator Assembly (with o-rings) into the valve housing and secure it in place with the 95558 Retaining Ring.

2. Position the 52296 Repair Collar around the valve housing and secure the tool in a vise so that the 12132 Pin, 01462 Safety Throttle Lever, and 01449 Valve

Stem can be installed. Install these parts.

3. Position the 52296 Repair Collar around the valve housing and secure the tool in a vise so that the air inlet opening is pointing up.

4. Install the 01464 Seal into the valve housing so that it is laying flat.

5. Use needle nose pliers to install the 01472 Tip Valve so that the metal pin passes through the hole in the 01449 Valve Stem.

6. Install the 01468 Spring so that the smaller end of the spring fits against the back of the tip valve.

7. Install the air control ring against the back of the valve housing.

8. Apply a small amount of the Loctite #567 (or equivalent) to the external threads of the 94523 Inlet Adapter and install it into the valve housing.

(Torque to 23 N•m/200 in. lbs.)

9. Hold the inlet adapter stationary with a wrench when installing the air fitting.

Valve Assembly Complete.

Model 56727: Planetary Gear Assembly

1. Use the RAISED CENTER of the 96239 Bearing Press Tool and the arbor press to install the 54552 Bearing onto the front of the 50787 Planetary Carrier.

2. Apply a small amount of Loctite #271 (or equivalent) to the threads of the 50782 Adapter that connect to the planetary carrier. Install the adapter into the

planetary carrier. (Torque to 17 N•m/150 in. lbs.)

3. Apply the 95542 Grease to the bearings in the 06213 Planetary Gears (2). Install the planetary gears into the carrier and install the 54472 Pins (2). Install the

54468 Ring Gear so that the notches will align with the lubricant and set screw access holes in the 50776 Housing.

4. Use the RAISED CENTER of the 96239 Bearing Press Tool and the arbor press to install the REAR 54552 Bearing onto the 50787 Planetary Carrier.

IMPORTANT: Carefully press the bearing down until it just touches the ring gear. This will establish a snug fit between the bearings and the ring gear.

Planetary Gear Assembly Complete.

Motor Assembly:

1. Secure the body of the rotor in a vise with aluminum or bronze jaws and install the 01479 Spacer onto the rotor.

2. Select .003" (.08 mm) shim thickness from the 54529 Shim Pack and install these into the 01478 Front Bearing Plate.

(continued on next page.)