Dynabrade 4657971919 User manual

Disassembly Instructions – Dynabug Sander

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

Notice: To avoid damage, use the special repair tools contained in the 57098 Motor Repair Kit.

Shut off the air supply and deplete air from the hose. Disconnect the tool from the air supply.

Motor Disassembly:

1. Position the 57092 Repair Collar around the housing.

Fasten the sander in a vise with the sanding pad facing up. Notice: Do not over tighten

the sander in the vise. Over tightening will make it difficult to remove the 57059 Lock

Ring. (SEE STEP #3)

Use a 3 mm hex key to remove the pad screws (4).

57092 Repair Collar

3 mm hex key

Use a 3/16" hex key to remove the 96168 Screw.

Use a Phillips screwdriver to remove the 96114 Screws (6).

Remove the 57825 Pad Top.

3/16" hex key

2. Use a slot-blade screwdriver to loosen the 96116 Clamp. Remove the clamp, 57822 Boot

and 57823 Pad Mount.

3. Use the 56058 Lock Ring Wrench to loosen the 57059 Lock Ring. Turn counterclockwise.

4. Pry-up, under the motor shaft balancer to remove the air motor from the housing.

Remove the 57054 Rear Ring from the inside of the housing.

5. Use retaining ring pliers to remove the 95626 Retaining Ring.

6. Fasten the 96346 Bearing Separator (2") around the 57058 Cylinder. Place the bearing

separator and motor in the 96232 Arbor Press (#2) with the counterweight pointing down.

Use the arbor press and a 5/16" or 8 mm diameter flat-end press tool to push the shaft

out of the 01206 Bearing.

7. Remove the rotor, vanes, key, and front bearing plate.

Use the bearing separator and the arbor press ram to remove the 57088 Bearing.

96346 Bearing Separator

8. By hand, or with the arbor press, use the 96214 Bearing Removal Tool to remove the 01206

Bearing from the 57056 Rear Bearing Plate.

9. Balancer Bearing and Shaft Disassembly:

a) Fasten the counterweight in a vise with aluminum or bronze jaws so that the hex of the

57069 Balancer Shaft is pointing up. Use a thin slot-blade screwdriver to pick-out the end

of the 95630 Snap Ring and remove the snap ring from the motor shaft balancer.

96214 Bearing Removal Tool

b) To break the adhesive bond, use two flat-blade screwdrivers (large) to pry-up on the

balancer shaft and bearing. Notice: If necessary, use a HEAT GUN to apply heat to

the counterweight.

Use the 56056 Bearing Puller to remove the balancer shaft and the 56052 Bearing.

c) Fasten the bearing separator between the 56052 Bearing and the hex end of the 57069

Balancer Shaft.

Place the bearing separator and the balancer shaft in the arbor press with the hex

end pointing down. Use the arbor press ram to break the adhesive bond.

Use a 5/16" or 8 mm diameter flat-end drive punch as a press tool to push the balancer

shaft out of the 56052 Bearing.

Remove the 59084 V-Seal.

Motor Disassembly Completed.

RAM

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