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Disassembly/Assembly Instructions - Right Angle Sanders (cont.)

Spindle Lock Assembly:

1.

Install a new 

97156 

Ring onto the plunger and apply a small amount of the Dynabrade Air Lube 10W/NR (P/N 

95842 

or equivalent) to the o-ring and plunger.

2.

Install 

98285

Spring onto the housing bushing and insert the 

25273 

Plunger Assembly through the spring.

3.

Install the plunger assembly into the spindle lock bushing. 

Note

: Rotating the plunger while inserting prevents damage to the o-ring.

Spindle Lock Assembly Complete.

Motor Assembly:

1.

Install 

01010

Spacer onto the rotor front mandrel.

2.

Select .003" (.08mm) thickness shims from the 

01121

Shim Pack and install these into the 

25236

Front Bearing Plate.

3.

Install 

98242

O-Ring into front bearing plate groove and install 

01007

Bearing, into the front bearing plate.

4.

Position the rotor in a vise with aluminum or bronze jaws so that the rotor spindle is pointing up. Install the front bearing/plate onto the rotor.

5.

Apply a small amount of the Loctite

®

#243 (or equivalent) to the external threads on the rotor stem and install the pinion gear. (Torque to 17N·m/150 lbs. in.)  

Using a hook/pin spanner wrench. Remove the assembly from the vise.

6.

Use a .001" (0.3mm) thick feeler gauge to check the clearance between the front bearing plate and the face of the rotor. The clearance should be .001"-.0015" (0.3-0.4mm). 

Note: 

If the clearance needs adjustment repeat steps 2-6 adding or removing shims as required.

7.

Lubricate 

25234

Vanes (4) with the 

95842

Dynabrade Air Lube 10W/NR (or equivalent) and install these into the rotor.

8.

Install 

25235

Cylinder over the rotor so that the air inlet opening of the cylinder will line up with the air inlet opening on the 

25237

Rear Bearing Plate.

9.

Install 

01206

Bearing into 

25237 

Rear Bearing Plate.

10.

Use the raised inner diameter of 

96244

Bearing Press Tool and the arbor press to install the rear bearing plate onto the rotor.

Note:

Carefully press the bearing/plate down until it just touches the cylinder. This will establish a snug fit between the bearing plates and the cylinder.

11.

Fasten the pinion gear in a vise with aluminum or bronze jaws so that the rear bearing/plate pointing up.

12.

Apply a small amount of the Loctite

®

#567 (or equivalent) to the external threads of governor assembly. Install it onto the rotor using an 19 mm crowfoot and 

torque wrench. 

LEFT HAND THREAD

Turn counterclockwise. (Torque to 9N·m/80 lbs. in.)

13.

Carefully slide the motor assembly into the housing.

14.

Place padding around the housing and carefully hold the housing stationary in a vise. Apply a small amount of the Loctite

®

#567 (or equivalent) to housing external threads. 

Use an adjustable wrench tighten 

25257

Cup Nut onto housing. Turn clockwise. (Torque to 30N·m/265 lbs. in.)

Important: Allow 30 minutes for the adhesives to cure before operating the tool.
Run the tool to make sure that the air motor is functioning properly before installing the right angle gears. Motor Assembly Complete.

Spindle/Gear Assembly:

1.

Position the spindle in the arbor press so that the threaded end is pointing down.

2.

Use a 19/32" deep well socket as a press tool, install the 

01036 

Bearing onto the spindle and against the step.

3.

Use a 19/32" deep well socket as a press tool and install the 

25241 

Bevel Pinion onto the spindle.

4.

Prepare the 

25264 

Wick by soaking in 

95848 

Gear Oil and then install the wick onto the spindle.

5.

Press 

02057

Bearing using 

96243

Press Tool (

sold separately

) onto spindle until the spindle is flush with the bearing top.

6.

Place padding around the housing and carefully hold the housing stationary in a vise with the right angle spindle opening facing up.

Important: Follow these steps to adjust the fit  or “backlash” of the spiral bevel gear/pinion gear.

7.

Install the spindle assembly into the housing align wick shape to housing contour.  Mesh bevel and pinion gears together.

8.

Apply a small amount of downward force on the spindle and rotate the spindle 360˚. The rotation should be smooth without any tight feel or binding of the gear teeth. Next, 
rotate the spindle forward and backward to check the amount of backlash (free movement between the gear teeth). The correct fit should be minimal backlash without any 
binding of the gear teeth. Add or remove shims to adjust the gear “backlash”.

9.

Place the 

53609 

Felt Seal into the 

25265 

Retainer recess bore.

10.

Apply a small amount of the Loctite

®

#567 (or equivalent) to the threads of the retainer and use the 

97782 

Pin wrench to install the retainer onto the housing.

LEFT HAND THREAD

Turn counterclockwise. (Torque to 23N·m/203 lbs. in.)

11.

Re-check the fit of the gears by hand before connecting the tool to the air supply. The correct fit should be minimal backlash without any binding of the gear teeth. Add or 
remove  shims to adjust the gear fit if necessary.

12.

Use the 

95541

Lubricant Gun to apply the 

95848 

Gear Oil Lubricant required for the lubricating wick prime the plunger before adding gear oil to housing. Inject three full

plunges of the gear oil into the 

01041

Gear Oil Fitting on the front of housing.

Note:

Inject three full plunges of gear oil into the lubricant fitting after operating the tool every 24-hour interval of use.

Right Angle Assembly Complete:

Muffler Assembly:

1.

Install 

25282

Silencer (Cross section size: 7.5 mm) up and inside recess diameter of 

25278

Muffler Cover.

2.

Install the 

98281 

O-Ring (Cross section size: 2.4 mm) into the inside groove of the muffler cover.

3.

Install the 

98282 

O-Ring (Cross section size: 2.0 mm) into the outside groove of the muffler cover.

4.

Install 

25278 

Muffler Cover (the side with the smaller hole) onto 

25281

Muffler Stem Assembly.

5.

Install 

25283

Silencer (Cross section size: 13 mm) into housing cavity.

6.

Apply a small amount of the Loctite

®

#243 (or equivalent) to the external threads of the 

25281

Muffler Stem Assembly. Install the 

25217

Muffler Assembly

onto the housing. Rotate 

25281

Muffler Stem Assembly until slot aligns with housing raised boss. Thread socket head cap screw into housing using a 5/32" hex key

(Torque to 7N·m/60 lbs. in.).

Muffler Assembly Complete.

Final Assembly:

Important: Allow 30 minutes for the adhesives to cure before operating the tool. Install and properly position all guarding and auxiliary side handle. Before installing
mounting flanges or any abrasive product, the air tool must be tested for proper operation. Follow these steps to verify the correct rated operating speed of the tool. 

1.

Supply 3 drops of 

95482

Dynabrade Air Lube 10W/NR (or equivalent) into the air inlet bushing of the tool while the throttle lever is depressed. Allowing the oil to flow into 

the air motor. 

2.

Release the throttle lever.

3.

With the air supply valve in the 

OFF

position, carefully connect the tool to the air supply hose.

Note: 

Use a wrench to hold the air inlet bushing on the tool stationary when 

installing the air supply connection.

4.

Once the tool is connected to the air supply, turn the supply valve to the ON position. Run the tool and use a tachometer to verify the rated operating speed (RPM) of the tool. 
The tool should operate within 5% of the maximum rated RPM. The tool RPM must never exceed the maximum rated RPM with the operating air supply pressure reading 90 
PSIG (6.2 bar g) at the air inlet of the tool. To adjust free speed add or remove shims. Adding shims will increase the speed, removing shims will reduce the tool free speed.
Once the correct rated operating speed for the tool is verified, disconnect the tool from the air supply and install the proper flanging and abrasive product.

Final Assembly Complete. Tool Assembly Complete.

6

Summary of Contents for 52631

Page 1: ...that exceed the applicable threshold limit values required by law WARNING Air line hazard pressurized supply lines and flexible hoses can cause serious injury Do not use damaged frayed or deteriorated...

Page 2: ...for use in explosive atmospheres and are not insulated for contact with electric power sources Use a vise or clamping device to hold work piece firmly in place Do not apply excessive force on tool or...

Page 3: ...tool labels must be kept legible at all times if not reorder label s and replace User is responsible for maintaining specification information i e Model S N and RPM See Assembly Breakdown Blow air sup...

Page 4: ...overnor Spring 39 25298 Shim 25 mm Thk asReq 40 25299 Shim 13 mm Thk asReq 41 25292 Governor Spindle 42 25295 Pin 43 66435 O Ring 44 25256 Governor Housing 45 25257 Cup Nut 46 12132 Pin 47 01462 Safet...

Page 5: ...pply a small amount of the Dynabrade Air Lube 10W NR P N 95842 or equivalent around the 25273 Plunger Assembly 2 Place padding around the housing and carefully hold the housing stationary in a vise wi...

Page 6: ...or backlash of the spiral bevel gear pinion gear 7 Install the spindle assembly into the housing align wick shape to housing contour Mesh bevel and pinion gears together 8 Apply a small amount of dow...

Page 7: ...earing 1 T 23 01294 Shim 1 T 24 01293 Shim 1 T 25 98242 O Ring 1 T 26 25236 Front Bearing Plate 1 X 27 01010 Spacer 1 X 28 25233 Rotor 1 X 29 25234 Vane 4 pkg 1 T 30 25235 Cylinder 1 X 31 96411 Pin 1...

Page 8: ...e Contact Information 1 American National Standards Institute ANSI 25 West 43rd Street Forth Floor New York NY 10036 Tel 1 212 642 4900 Fax 1 212 398 0023 2 Government Printing Office GPO Superintende...

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