Dynabrade 52331 Instrukcja obsługi - Strona 3

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Disassembly/Assembly Instructions - .4 Hp/7˚/Rear Exhaust

Important: Manufacturer's warranty is void if tool is disassembled before warranty expires.

Notice: Dynabrade strongly recommends the use of their 52296 Repair Collar (sold separately) during assembly/disassembly activities. Failure to

use this collar will highly increase the risk of damage to the valve body of this tool. Please refer to parts breakdown for part identification.

Motor Disassembly:

1. Secure air tool in vise using 52296 Repair Collar or padded jaws.

2. Remove collet cap and insert.

3. With an adjustable pin wrench, remove 01560 Exhaust Cover by turning counter-clockwise. Remove muffler insert.

4. Pull motor assembly from housing.

5. Press rotor from 02696 Rear Bearing. Press 02696 Bearing from 02673 Rear Bearing Plate.

6. Remove 01435 Collet Body from rotor shaft. Twist collet counter clockwise from shaft.

7. Remove 02649 Front Bearing, bearing plate, cylinder, blades (4) and 01479 Spacer from rotor.

Note: 02649 Bearing is a slip fit into 01478 Front Bearing Plate.

Motor Disassembly Complete.

Motor Assembly:

Important: Be sure parts are clean and in good repair before assembling.

1. Place 01475 Rotor in padded vise with threaded spindle facing upward.

2. Slip 01479 Spacer onto rotor.

3. Place a .002" shim into 01478 Front Bearing Plate as an initial spacing (Note: 54529 Shim Pack contains .001", .002", and .003" shims) and slip

02649 Bearing into plate.

4. Install bearing/bearing plate assembly onto rotor.

5. Tighten 01435 Collet Body onto rotor (torque to 17 N•m/150 in. - lbs.).

6. Check clearance between rotor and bearing plate by using a .001" feeler gauge. Clearance should be at .001" to .0015". Adjust clearance by repeating

steps 1-5 with different shim if necessary.

7. Once proper rotor/gap clearance is achieved, install well lubricated 01480 Blades (4) into rotor slots.

Dynabrade Air Lube P/N 95842 is recommended for lubrication.

8. Install cylinder over rotor.

9. Press 02696 Rear Bearing into 02673 Rear Bearing Plate. Press bearing/bearing plate assembly onto rotor. Be sure that pin and air inlet holes

line-up with pin slot and air inlet holes in cylinder. Important: Fit must be snug between bearing plates and cylinder. A loose fit will not achieve the

proper pre-load of motor bearings. If too tight, rotor will not turn freely. Rotor must then be lightly tapped at press fit end so it will turn freely while still

maintaining a snug fit.

10. Secure housing in vise using 52296 Repair Collar.

11. Place 02679 Shield over 02696 Rear Bearing and Install motor assembly into housing. Be sure motor fits all the way into housing.

12. Assemble 01580 Silencer into 01560 Exhaust Cover and install onto motor housing (torque 28 N•m/250 in. - lbs.).

13. Motor adjustment must now be checked. With motor housing still mounted in vise, pull end of rotor and twist (10-15 lbs. force), rotor should turn

freely without drag. If drag or rub is felt, then increase preload or remove shim. Also, push end of rotor and twist (10-15 lbs. force), rotor should

turn freely without drag. If drag or rub is felt, then deload or add shim.

Motor Assembly Complete.

Valve Body Disassembly:

1. Position valve body in a vise by using 52296 Repair Collar so that air inlet points up.

2. Secure 01578 Inlet Adapter with a wrench to prevent it from turning. While holding the inlet adapter stationary remove the air fitting by turning it counterclockwise.

Important: 01578 Inlet Adapter must be secured before attempting to remove the air fitting so as to avoid damaging the valve body housing.

3. Remove 01578 Inlet Adapter.

4. Remove 95711 Retaining Ring from inlet adapter. Then remove 01486 Felt Silencer (4), and 01379 Bronze Muffler.

5. Remove 01568 or 01564 Air Control Ring from the valve body housing. Use needle nose pliers and remove 01468 Spring, 01472 Tip Valve and 01464 Seal.

6. Use a 2.5 drive punch to remove 12132 Pin and 01448 or 01462 Throttle Lever.

7. Remove 95558 Retaining Ring and push 01469 Regulator from the valve body housing.

Valve Body Disassembly Complete.

Valve Body Assembly:

1. Install 01469 Regulator complete with o-rings and valve stem into valve body housing. Secure it in place with 95558 Retaining Ring.

2. Place valve body housing in a vise, holding it with the aid of 52296 Repair Collar so that the air inlet openings points up.

3. Insert 01464 Seal into the air inlet opening so that it lays flat.

4. Line up hole in valve stem with inlet opening in housing (looking past brass bushing). Install 01472 Tip Valve so that the metal pin passes through the

hole in the valve stem. Install 01478 Spring (small end against tip valve).

5. Position 01581 or 01564 Air Control Ring around inlet opening. Place 01279 Bronze Muffler inside 01446 Air Deflector.

6. With 95620 Retaining Ring installed on female threaded end of 01578 Inlet Adapter insert the inlet adapter through 01446 Air Deflector.

7. Place 01486 Felt Silencer (4) inside 01446 Air Deflector.

(Continued on next page)