Parts Page Reorder No. PD03•10
Effective February, 2003
Supercedes PD02•47
For Serial No. 03A1145 and Higher
3" Dynabuffer
Models:
57126 - 3" Dynabuffer
Air Motor and Machine Parts
Always operate, inspect and maintain this tool in accordance with the Safety Code for portable air tools
(ANSI B186.1) and any other applicable safety codes and regulations. Please refer to Dynabrade’s
Warning/Safety Operating Instructions for more complete safety information.
!
WARNING
28
29
30
Index Key
No. Part # Description
21
A8
22 23 24 25
26
1
2
3
4
5
6
7
8
9
56145 3" Pad
31
35
37
51361 Shroud
95630 Snap Ring
57069 Balancer Shaft
95628 Bearing Shield
56053 Bearing Seal
56052 Bearing
32
33
A8
36
38
27
34 N•m
T
34
57422 Motor Shaft Balancer
56047 Key
19
18
10 59058 Lock Ring
11 50659 O-Ring
17
16
20
12 57088 Bearing
13 51366 Bearing Plate
14 57113 Rotor/Blade (5/pkg.) Set
15
O1
15 58358 Cylinder Assembly
(Includes 98462 Pin)
16 98462 Pin
47
17 51367 Bearing Plate
18 01206 Bearing
14
19 95626 Retaining Ring
20 97166 Hang Plate
21 02099 Housing
22 01548 Gasket
13
12
23 01461 Lock Nut
24 01547 Collar
O1
11
10
39
T
40
41
42
43
44 45
46
25 95523 O-Ring
A8
23 N•m
T
26 01470 Insert Assembly
27 57319 Housing - 57126
A8
8
28 N•m
28 01448 Throttle Lever
01462 Safety Lock Lever (Opt.)
9
29 12132 Pin
30 01449 Valve Stem
31 95558 Retaining Ring
32 95730 O-Ring
A1
6
7
5
33 01024 O-Ring
34 01469 Speed Regulator Assy.
35 01464 Seal
51360 – Overmold Grip
50679 – 26mm open-end
36 01472 Tip Valve
37 01468 Spring
A2
4
38 01543 Air Control Ring
39 95711 Retaining Ring
40 95438 O-Ring
3
A8
11.3 N•m
T
41 94521 Muffler Base
42 94528 Felt Muffler
43 94522 Muffler Cap
44 95375 O-Ring
KEY
Oil: O1 = Air Lube
O
A
2
1
Adhesive: A1 = Loctite #609
A2 = Loctite #271
45 94526 Spacer
A8 = Loctite #567
46 94523 Inlet Adapter
47 94519 Muffler Assembly
Torque: N•m x 8.85 = In. - lbs.
T
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Motor Assembly/Disassembly Instructions – 3" Dynabuffer
Important: Manufacturer’s warranty is void if tool is disassembled before warranty expires.
Notice: All of the special repair tools referred to in these instructions can be ordered from Dynabrade. The 96525 Tool Repair Kit is available and the items
contained in this kit are shown on the back of this parts page. Please refer to this parts page for proper part identification.
Motor Disassembly:
1. Disconnect the tool from the air supply.
Drawing 1
2. Invert the tool and place the 57092 Repair Collar around the 02099 Housing and the 51361 Shroud, above the two handle
bosses so that the back-up pad is facing up.
57091
Bearing Press Tool
3. Use the 50679 Wrench (26mm) to remove the back-up pad.
4. Insert the 56058 Lock Ring Wrench into the tabs of the 59058 Lock Ring and loosen the lock ring from the 02099 Housing by
turning it counterclockwise.
56052 Bearing
5. Remove the 51361 Shroud from the 02099 Housing by turning it counterclockwise.
6. Pull the motor assembly out of the 02099 Housing and remove the 58357 Cylinder Seal.
7. Use retaining ring pliers to remove the 95626 Retaining Ring.
Shaft Step
Bearing Seal and
Bearing Shield
8. Fasten the 96346 Bearing Separator between the 51367 Bearing Plate and the 58358 Cylinder Assembly.
9. Place the motor assembly with the bearing separator attached, on the table of the 96232 Arbor Press (#2) so that the counter
balance is pointing toward the floor.
Balancer Shaft
Assembly
10. Use a 3/16" dia. flat end drive punch as a press tool and push the 57422 Motor Shaft Balancer out of the 01206 Bearing.
11. Remove the rotor, vanes, and the 56047 Key from the motor shaft balancer.
12. Remove the 51366 Bearing Plate from the 57088 Bearing.
13. Fasten the bearing separator between the counter balance and the 57088 Bearing and use the arbor press to
remove the bearing.
Drawing 2
14. Secure the counter balance portion of the 57422 Motor Shaft Balancer in a vise with aluminum or bronze jaws so that the
26mm hex end of the 57069 Balancer Shaft is accessible and pointing up.
57091
Bearing Press Tool
15. Use a small thin screwdriver to pick the notched end of the 95630 Snap Ring out of the motor shaft balancer. Work the
screwdriver under and around the 95630 Snap Ring.
16. Fasten the bearing separator between the 26mm hex end of the 57069 Balancer Shaft and the 95628 Bearing Shield. Place
the separator on the table of the arbor press so that the hex end of the balancer shaft is pointing toward the floor. Use a 5/16"
dia. flat end punch as a press tool and press the 57069 Balancer Shaft out of the 56052 Bearing.
Motor Disassembly Complete.
57088 Bearing
Motor Shaft
Balancer
Valve Disassembly:
1. Place the 52296 Repair Collar around the 57319 Housing and secure it in a vise so that the air inlet is pointing up.
2. Use two wrenches when removing the air fitting. Place one wrench on the 94523 Inlet Adapter to hold it stationary and use
another wrench to remove the air fitting.
Balancer Shaft
Assembly
3. Remove the inlet adapter from the valve housing. Note: Refer to the exploded view of the muffler assembly to identify the
parts and their order of assembly.
4. Use needle nose pliers to remove the 01468 Spring and the 01472 Tip Valve. The 01464 Seal can be removed from the
valve housing with a small screwdriver.
Drawing 3
5. Use retaining ring pliers to remove the 95558 Retaining Ring and push the 01469 Speed Regulator Assembly along with the
01449 Valve Stem out of the valve housing.
57091
Bearing Press Tool
6. Use a 2.5mm dia. drive punch to remove the 12132 Pin and the throttle lever.
Valve Disassembly Complete.
51366
Front Bearing Plate
Valve Assembly:
Important: Clean and inspect all parts before assembling.
57088 Bearing
1. Place the 52296 Repair Collar around the 57319 Housing and secure it in a vise so that the air inlet is pointing up.
2. Install the 01469 Speed Regulator Assembly (includes o-rings) into the valve housing and secure it in place with the
95558 Retaining Ring.
Motor Shaft
Balancer
3. Insert the 01449 Valve Stem so that the end with the hole fits into the 01469 Speed Regulator Assembly.
4. Install the 01464 Seal into the inlet so that it is laying flat.
Balancer Shaft
Assembly
5. Use a needle nose pliers to grasp the white nylon portion of the 01472 Tip Valve and insert the metal pin of the tip valve into
the hole of the 01449 Valve Stem.
6. Install the 01468 Spring so that the smaller end of the spring fits against the center of the tip valve.
7. Place the 01543 Air Control Ring against the air inlet opening of the 57319 Housing.
8. Install the 01468 Spring so that the smaller end of the spring fits against the center of the tip valve.
9. Note: Refer to the exploded view of the muffler assembly to identify the parts and their order of assembly. Apply a small
amount of the Loctite #567 (or equivalent) to the threads of the inlet adapter and install it into the air inlet of the valve housing.
(Torque to 23 N•m/200 in.-lbs.)
Drawing 4
57091Bearing
Press Tool
51367 Rear Bearing
Plate (with 01206
Bearing)
10. Install the throttle lever and secure it in place with the 12132 Pin.
11. Use two wrenches when installing the air fitting. Place one wrench on the 94523 Inlet Adapter to hold it stationary and use
another wrench to install the air fitting.
Line-Up Pin
Motor Assembly:
53858 Cylinder
Assembly.
(w/Rotor and Vanes)
1. Place the hex end of the 57069 Balancer Shaft on the table of the 96232 Arbor Press (#2).
2. Install the 95628 Bearing Shield onto the balancer shaft so that the concave side is facing up.
3. Install the 56053 Bearing Seal onto the balancer shaft so that it fits down past the step on the balancer shaft.
4. Apply a small amount of the Loctite #271 (or equivalent) to the bearing surface of the balancer shaft.
5. Position the 56052 Bearing Press Tool to press the bearing down to the step of the 57069 Balancer Shaft.
6. Apply a small amount of Loctite #609 (or equivalent) to the outer diameter of the 56052 Bearing and install the balancer
bearing assembly into the 57422 Motor Shaft Balancer.
51366 Front
Bearing Plate
(with 57088 Bearing)
Motor Shaft
Balancer
7. Important: To avoid injury it is best to hold the counter balance in a vise when the 95630 Snap Ring is being installed. Use a
small thin screwdriver to install the snap ring. Install the 95630 Snap Ring between the hex end of the balancer shaft and the
95628 Bearing Shield. The snap ring must fit into the groove in the motor shaft balancer.
Balancer Shaft
Assembly
(continued on next page)
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Motor Assembly/Disassembly Instructions – 3" Dynabuffer (continued)
8. Use the larger end of the 57091 Bearing Press Tool to press the 57088 Bearing down to the top of the counter weight of the 57422 Motor Shaft Balancer. Also install the
51366 Bearing Plate in the same manner.
9. Install the 56047 Key into the 57422 Motor Shaft Balancer.
10. Install the 57113 Rotor/Blade Set (5/pkg.). Apply the 95842 Dynabrade Air Lube (10W/NR or equivalent) to the vanes.
11. Position the 58358 Cylinder Assembly so that the short line-up pin side fits against the 51366 Bearing Plate.
12. Install the 51367 Bearing Plate and the 01206 Bearing onto the 57422 Motor Shaft Balancer. Note: The 01206 Bearing is a slip fit into the 51367 Bearing Plate. Use the
smaller end of the 57091 Bearing Press Tool to press the bearing/plate down only until the 51367 Bearing Plate comes in contact with the 58358 Cylinder Assembly. This
should create a snug fit between the bearing plates and the cylinder.
13. Install the 95626 Retaining Ring with retaining ring pliers so that the curve of the ring is arched up. Press the ring down into the groove at the top of the motor shaft balancer.
14. Install the 59058 Lock Ring with the 50659 O-Ring over the counter balance of the motor shaft balancer so that the o-ring fits against the 51366 Bearing Plate. Apply a
small amount of the Loctite #567 (or equivalent) to the threads of the lock ring.
15. Apply the 95842 Dynabrade Air Lube (10W/NR or equivalent) to the 58357 Cylinder Seal and install it into the side of the cylinder.
16. Carefully install the motor assembly into the 02099 Housing so that the 98462 Pin fits into the line-up hole on the inside of the housing. Note: Grasp the motor assembly
by the counter balance while applying pressure against the 59058 Lock Ring with the tips of your thumb and index finger. Align the 98462 Pin with the hole on the inside of
the 02099 housing and carefully insert the air motor into the housing until the lock ring comes in contact with the internal threads of the 02099 Housing. Using your finger
tips, turn the lock ring clockwise into the housing. If resistance is felt, stop and realign the motor assembly. If the motor assembly is aligned correctly the lock ring and the
motor should advance into the housing easily. Before the lock ring and motor are tightened all the way into the housing, fit the 51361 Shroud over the counter balance and
thread the shroud onto the external threads of the 02099 Housing. Use the 56058 Lock Ring Tool to thread the 59058 Lock Ring into the 02099 Housing. Use the 57092
Repair Collar to hold the 02099 Housing in a vise when securing the lock ring. (Torque to 28 N•m/250 in.- lbs.)
Motor Assembly Complete. Tool Assembly Complete.
Throttle Positioning Procedure:
1. Place the 52296 Repair Collar around the valve housing and secure it in a vise so that the 02099 Housing is pointing up.
2. Slip the 01547 Collar down onto the valve housing to expose the 01461 Lock Nut.
3. With a firm hold on the 02099 Housing, use a 34mm or an adjustable wrench to turn the 01461 Lock Nut counterclockwise to loosen the 02099 Housing from the valve housing.
4. Orient the throttle lever to the operators desired grip and positioning. Note: Allow for additional rotation of the 02099 Housing as the 01461 Lock Nut is tightened.
5. With a firm hold on the 02099 Housing to reduce its rotation, use a 34mm or an adjustable wrench to tighten the 01461 Lock Nut. (Torque to 45 N•m/400 in.- lbs.)
Important: Carefully perform this procedure so as not to entirely separate the 02099 Housing from the valve housing. Loosen the 01461 Lock Nut only enough to
make the desired throttle lever adjustment.
Note: Motor should operate at between 9,000 and 11,000 RPM free speed with 80 PSIG of air at the inlet of the tool. RPM should be checked with a tachometer. Before
operating, we recommend that 2-3 drops of Dynabrade Air Lube P/N 95842 (or equivalent be placed directly into the air inlet with throttle lever depressed. Operate the machine
for approximately 30 seconds before application to workpiece to determine if machine is working properly and safely and to allow lubricating oils to properly dispense
through machine. Loctite® is a registered trademark of the Loctite Corp.
Disc pad Change:
1. Insert 50679 Wrench on flats of 57069 Balancer Shaft and twist off sanding pad by hand.
2. With wrench still in place, hand tighten new pad on tool.
3. No need to remove shroud.
Model
Number
Motor
HP (W)
Motor
RPM
Sound
Level
Maximum Air Flow
CFM/SCFM (LPM)
Air Pressure
PSIG (Bars)
Spindle
Thread
Weight
Pound (kg)
Length
Inch (mm)
Height
Inch (mm)
57126
.16 (119)
10,000
74 dB(A)
3/23 (651)
80 (5.5)
5/16"-24 female
2.0 (.91)
8-5/16 (211)
3-3/4 (96)
M
2
S
Additional Specifications: Air Inlet Thread 1/4" NPT • Hose I.D. Size 3/8" (10mm) • Tool Vibration Data (Per ISO 8662.8) 2.0 /
Optional Accessories
80030 Training and Maintenance Test Equipment Kit:
57092 Repair Collar
• 80025 Load Cell measures tool RPM under load and useful for training operators
for proper buffing pressure/operation. Electronic tachometer pick-up securely
fastens to wear plate.
• Specially designed collar for use in vise to
prevent damage to motor housing during
disassembly/assembly.
• 94315 Pressure Gage to ensure peak operating performance.
52296 Repair Collar
• 95842 Air Lube formulated for pneumatic tools. Prevents rust and formation of
gum/sludge for longer tool operation with greater power and less downtime.
• Specially designed collar for use in vise to
prevent damage to valve body during
disassembly/assembly.
• 96368 Tachometer used to measure tool RPM.
53163 Handle
96537 Motor Tune-Up Kit
56058 Lock Ring Wrench
•
Handle is designed for
two-handed operation.
•
Includes assorted parts to
help maintain and repair motor.
• Lock Ring Tool has a 3/8 in. square socket
for use with 3/8 in. drive; breaker bar,
ratchet head, or torque wrenches.
53209 Ergo-Handle
•
This anti-vibration handle
provides increased comfort
for the operator.
57091 Bearing Press Tool
• Use with a #2 arbor press to achieve
accurate press of bearings and motor parts.
Filter-Regulator-Lubricator
11405: 40 SCFM @ 100 PSIG, 3/8" NPT female ports.
96525 Tool Repair Kit
• Includes special tools for proper
disassembly/assembly of the tool.
• Provides accurate air pressure regulation, two stage
filtration of water/contaminants and lubrication of
pneumatic components.
• Includes all above listed tools.
DYNABRADE®
Email: [email protected]
DYNABRADE, INC., 8989 Sheridan Drive • Clarence, NY 14031-1490 • Phone: (716) 631-0100 • Fax: 716-631-2073 • International Fax: 716-631-2524
DYNABRADE EUROPE S.àr.l.,
Zone Artisanale • L-5485 Wormeldange—Haut, Luxembourg • Telephone: 352 76 84 94 1 • Fax: 352 76 84 95 1
©DYNABRADE, INC., 2004
PRINTED IN USA
PD03.10_Rev.1_02/04
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