Dynabrade 57700 User guide

Models:
57700 – Non-Vacuum
57704 – Central Vacuum
48 49 50
Parts Page Reorder No. PD00•84
Effective November, 2000
Supersedes PD97•50
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
!
8" Gear Driven
Orbital Sander (900 RPM)
Air Motor and Machine Parts
For Serial No. 8B1126 and Higher
Index Key
No. Part # Description
197010 Screw (9)
295886 Washer (9)
3Sanding Pads
56234 Non-Vacuum
56235 Central Vacuum
495898 Screw
557334 Counter Balance
696276 Nut (4)
757333 Mounting PlateAssy.
857736 8" Vacuum Shroud
995886 Washer (4)
10 96425 Screw (4)
11 96273 O-Ring
12 57335 Bearing
13 96118 Screw (3)
14 57748 Gear
15 96150 Shim (As Required)
16 57360 Felt Wiper
17 96275 Washer (4)
18 96274 Screw (4)
19 57749 Pinion
20 96166 Set Screw
21 57332 Lock Ring
22 54673 Rotor Key
23 57331 Motor Shaft
24 56052 Bearing
25 57324 Front Bearing Plate
26 54705 Rotor/Blade Set
27 54631 CylinderAssembly
(Incl. 95865 Pin)
28 95865 Line-Up Pin
29 54629 Rear Bearing Plate
30 01206 Bearing
31 95626 Retaining Ring
32 57328 Shroud
33 57705 Housing – 57700
57706 Housing – 57704
34 95523 O-Ring (2)
35 57382 Gasket
36 56671 Handle
37 96123 Screw (2)
38 57396 Valve Stem
39 01211 Split-Lock Washer (6)
40 01464 Seal (2)
41 01472 Tip Valve
42 01468 Conical Spring
43 56673 Gasket
44 96328 O-Ring
45 56672 Adapter
46 01024 O-Ring (2)
47 57343 Regulator Plug
48 54199 Muffler Seat
49 54195 Muffler (3)
50 54194 Muffler Cap
51 98597 Retaining Ring
52 57344 Throttle Lever
53 01017 Pin
54 96421 Flat Washer (2)
55 01788 Screw (2)
56 01494 Inlet Bushing
11
15
16
17
23
22
24
25
27
28
29
30 31
32
43 44 45
52 53
51
40
55
39
54
46 47
7
5
10
9
8
3
2
33
35
36 38
239
42
41
40
37
34
Disc Pad Change
Use a 3 mm hex
wrench to remove
97010 Screw (5)
and 95886 Washers
from mounting
plate.Remove old
pad and replace
with new pad.
Replace screws and
washers and tighten
with 3 mm hex
wrench.No need to
remove shroud.
T
A
A2
A2
A3
A3
A2
A3
O1
A2
A3
G1
A3
O1
G1
Adhesive:
A2= Loctite #271
A3= Loctite #242
Torque: N•m x 8.85 = In. - lbs.
KEY
O
G
Oil: O1= Air Lube
Grease: G1= Lubriplate
630 AA
12
14
18
20
26
4
3.38 N•m
T
7 N•m
T
23 N•m
T
3 N•m
T
2 N•m
T
7 N•m
T34 N•m T
34 N•m T
9 N•m T
1
6
19
21
56
1
13
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Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade

2
(PD00•84)
OneYear Warranty
Following the reasonable assumption that any inherent defect which might prevail in a product will become apparent to the user within one year from the date of purchase,
all equipment of our manufacture is warranted against defects in workmanship and materials under normal use and service. We shall repair or replace at our factory, any
equipment or part thereof which shall, within one year after delivery to the original purchaser, indicate upon our examination to have been defective. Our obligation is
contingent upon proper use of Dynabrade tools in accordance with factory recommendations, instructions and safety practices. It shall not apply to equipment which has
been subject to misuse, negligence, accident or tampering in any way so as to affect its normal performance. Normally wearable parts such as bearings, contact wheels,
rotor blades, etc., are not covered under this warranty.
•Important: User of tool is responsible for following accepted safety codes such as those published by theAmerican National Standards Institute (ANSI).
•Tool RPM must never exceed abrasive/sanding pad RPM rating, regardless of tool capacity.
•Operate machine for one minute before application to workpiece to determine if machine is working properly and safely before work begins.
•Always disconnect power supply before changing abrasive/accessory or making machine adjustments.
•Inspect abrasives/accessories for damage or defects prior to installation on tools.
•Please refer to Dynabrade’s Warning/Safety Operating Instructions Tag (Reorder No. 95903) for more complete safety information.
•Warning: Hand, wrist and arm injury may result from repetitive work, motion and overexposure to vibration.
Notice
All Dynabrade motors use the highest quality parts and metals available and are machined to exacting tolerances. The failure of quality pneumatic motors can most often be traced
to an unclean air supply or the lack of lubrication. Air pressure easily forces dirt or water contained in the air supply into motor bearings causing early failure. It often scores the
cylinder walls and the rotor blades resulting in limited efficiency and power. Our warranty obligation is contingent upon proper use of our tools and cannot apply to equipment which
has been subjected to misuse such as unclean air, wet air or a lack of lubrication during the use of this tool.
Note: To order replacement parts specify the Model# and Serial# of your machine.
Safety Instructions:
Products offered by Dynabrade should not be converted or otherwise altered
from original design without expressed written consent from Dynabrade, Inc.
Important Operating, Maintenance and Safety Instructions
Carefully read all instructions before operating or servicing any Dynabrade®Abrasive Power Tool.
Warning: Hand, wrist and arm injury may result from repetitive work motion and overexposure to vibration.
Important: All Dynabrade Rotary Vane air tools must be used with a Filter-Regulator-Lubricator to maintain all warranties.
Operating Instructions:
Warning: Eye, face, respiratory, sound, and body protection must be worn while operating power tools. Failure to do so may result in serious injury or death. Follow safety
procedures posted in workplace.
1. With power source disconnected from tool, securely fasten abrasive/accessory on tool.
2. Install air fitting into inlet bushing of tool. Important: Secure inlet bushing of tool with a wrench before attempting to install the air fitting to avoid damaging
valve body housing.
3. Connect power source to tool. Be careful not to depress throttle lever in the process.
4. Check tool speed with tachometer. If tool is operating at a higher speed than the RPM marked on the tool or operating improperly, the tool should be serviced to correct
the cause before use.
5. To avoid the danger of contaminating the workpiece from the lubricating oils permeating the air or sanding dust, it is recommended that this machine be hooked up to a
central vacuum system or one of our unique vacuum systems that gather all such contaminates in a paper or cloth dust bag. This self contained vacuum system is highly
efficient and convenient to use since it does not need to be attached to a separate vacuum system and is as mobile as the machine itself.
6. Air tools are not intended for use in explosive atmospheres and not insulated for contact with electrical power sources. Sanding/Grinding certain materials can create
explosive dust. It is the employers responsibility to notify the user of acceptable dust levels. Sanding/Grinding can cause sparks which can cause fires or explosions. It is
the users responsibility to make sure the work area is free of flammable materials.
Maintenance Instructions:
1. All Dynabrade Rotary Vane air motors should be lubricated with two drops of Dynabrade Air Lube (P/N 95842: 1 pt. 473 ml.) placed directly into the air inlet with throttle
lever depressed every four hours of use.
2. Gears on the 8" Gear Driven Sander should be greased with Dynabrade 95541 Grease Gun and 95542 Grease (10 oz. 283.5 g.). Apply grease to the grease fitting in the
mounting plate, one full plunge every 300 hours of use.
3. 57360 Felt Wipers should be replaced every 600 hours of use.
4. AnAir Line Filter-Regulator-Lubricator must be used with this air tool to maintain all warranties. Dynabrade recommends the following: 11405 Air Line
Filter-Regulator-Lubricator – Provides accurate air pressure regulation, two-stage filtration of water contaminant and positive-drip lubrication of pneumatic components.
Operates 40 SCFM @ 100 PSIG has 3/8" NPT female ports.
5. Frequent drainage of water traps in air lines is recommended.
6. Some silencers on air tools may clog with use. Clean and replace as required.
7. AMotor Tune-Up Kit (P/N 96195) is available which includes assorted parts to help maintain and repair motor.
Model Motor Motor Pad Dia. Sound Air Flow Rate Hose Size Weight Length Height
Number RPM HP (W) Inch (mm) Level CFM/SCFM (LPM) Inch (mm) Pound (kg) Inch (mm) Inch (mm)
57700 900 .31 (231) 8 (203) 87 dBA 4/25 (708) 3/8 (10) 4.3 (1.9) 12 (305) 5 (127)
57704 900 .31 (231) 8 (203) 87 dBA 4/25 (708) 3/8 (10) 4.3 (1.9) 12 (305) 5 (127)
Additional Specifications: Air Inlet Thread 1/4" NPT • Air Pressure 90 PSIG (6.2 Bars)
Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade
Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade

Motor Disassembly/Assembly Instructions
Important: Manufacturers warranty is void if tool is disassembled before warranty expires.
Acomplete Tune-Up Kit, P/N 96195, is available which includes assorted parts to help maintain and repair motor. These instructions are for use
in conjunction with P/N 96283 Repair Kit, which includes special tools for proper disassembly/assembly of tool.
To Disassemble:
1. Disconnect tool from power source.
2. Invert machine and secure in soft jaw vise.
3. Remove sanding pad with 3mm hex wrench.
4. Remove counterbalance:
a.) Remove 95898 Screw with 5mm hex wrench. Note: To prevent counter balance rotation place a wrench on the counter balance.
b.) Remove counterbalance.
5. Pull out mounting plate sub-assembly.
6. Disassemble mounting plate sub-assembly:
a.) Remove 96276 Nuts (4) and 96274 Screws then lift out gear.
b.) Remove 96118 Screws (3).
c.) Press out 57335 Bearing by using 57091 Bearing Press Tool.
7. Remove 96166 Set Screw. Note: Remove 96150 Shims if so equipped.
8. Insert an adjustable spanner wrench or 96337 Lock Ring Wrench in the holes of the 57332 Lock Ring and turn counterclockwise to loosen. Motor may
now be lifted out for service.
9. Remove 95626 Retaining Ring from the motor shaft.
10. Attach a 2 in. bearing separator around the rear portion of the 54631 Cylinder nearest the rear bearing plate.
11. Place the separator on the table of a (#2) arbor press with the larger end of the motor shaft pointing down.
12. Press the retaining ring end of the motor shaft out of the rear motor bearing by using a 3/16 in. flat nose punch.
13. Remove cylinder, rotor, blades and key.
14. Press the 57331 Shaft and 56052 Bearing out through the front end plate using a (#2) arbor press.
15. Secure the 57749 Pinion in a soft jaw (bronze or aluminum) vise. With the 96182 Front Plate Removal Tool and a 3/8" ratchet, or breaker bar, turn the
57324 Front End Plate counterclockwise to loosen.
16. Remove 01206 Bearing from 54629 Rear Bearing Plate. Press 56052 Bearing from 57331 Motor Shaft.
To Assemble:
Important: Be certain parts are clean and in good repair before assembling.
1. Use 57091 Press Tool and press 56052 Bearing onto 57331 Motor Shaft down to shoulder, seal side toward shoulder.
2. Apply 3 drops of #271 Loctite®(or equivalent) to outside of bearing. Assemble front bearing plate onto shaft and press plate on outer race of bearing.
3. Place rotor key, rotor, and blades onto shaft. Note: Be certain rotor “floats” easily on the shaft. Because the design of this motor uses a “floating rotor”,
there is no need to set or adjust gap between the rotor and end plates.
4. Place 54631 Cylinder over rotor. The “short” line-up pin goes toward the front plate.
5. Place rear bearing plate (with 01206 Rear Bearing pressed into place) over shaft and “long” end of line-up pin and press fit in place using
57091 Press Tool.
6. Install 95626 Retaining Ring, concave side toward motor. Note: Be certain retaining ring is completely pressed down into its groove on the shaft.
7. Grease the rubber seals inside the housing using a small amount of multi-purpose grease or petroleum jelly.
Note: Be curtain that rubber seals in housing have not pulled out of their seat during disassembly. If this has happened re-seat seals by pushing them
back in place until they are flush with inside diameter.
8. Slide motor assembly into housing. Note: With handle pointing down be certain line-up pin enters slot to the right of center.
9. Secure motor housing in a vice, using 57092 Collar or soft jaws (be careful not to over tighten tool in vise).
10. Tighten 57332 Lock Ring with 96337 Lock Ring Tool to 34 N•m/300 in. - lbs. Align holes in 57332 Lock Ring with hole in housing.
11. Apply a small amount of #242 loctite®(or equivalent) to the threads of 96166 Set Screw. Use a 2 mm hex key and install set screw into the housing
through one of the holes in the lock ring until set screw is flush with the top of the lock ring.
12. Apply a bead of #242 Loctite®(or equivalent) to threads of 57324 Front Bearing Plate. Screw 57749 Pinion onto 57324 Front Bearing Plate and torque
to 34 N•m/300 in. - lbs. using 96181 Pinion Wrench.
13. Mounting Plate Sub-Assembly:
a.) Press 57335 Bearing into 57333 Mounting Plate.
b.) Insert 96118 Screws (3) and apply 1 drop of #271 Loctite®(or equivalent). Note: All screws should be hand tight before torque is applied.
c.) Press 57748 Gear into 57333 Mounting Plate, making sure to align mounting holes and that the 96273 O-Ring on back of gear is in place before
assembly to mounting plate.
d.) Insert 96275 Washers into c-bore in gear.
e.) Apply 1 drop of #271 Loctite®(or equivalent) to 96274 Screws (4), insert through gear and thread into mounting plate torque 7 N•m/60 in. - lbs.
Insert 96276 Nuts (4) and torque 7 N•m/60 in. - lbs.
14. Assemble mounting plate sub-assembly onto motor shaft machine assembly.
Note: If tool is equipped with 96150 Shim be sure to replace it on the shaft prior to assembling the mounting plate onto shaft.
15. Assemble counterbalance to motor shaft.
16. Install 95898 Screw to secure counterbalance. Apply 1 drop of #242 Loctite®(or equivalent) to threads and torque screws with 5mm hex wrench
to 9 N•m/80 in. - lbs. Note: To prevent counterbalance rotation with motor, use a wrench on the 57334 Counterbalance.
17. Attach sanding pad. Torque the 97010 Screws (5) to 3.38 N•m/30 in. - lbs.
(continued on next page)
3
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Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade

Accessories
96195 Motor Tune-Up Kit
•Includes assorted parts to help
maintain and repair motor.
96283 Motor Repair Kit
• Contains special tools for use of
Disassembly/Assembly of machine.
Motor Disassembly/Assembly Instructions (continued)
To Disassemble Valve And Speed Regulator Assemblies:
1. Invert tool and place in soft jaw vise or use 57092 Repair Collar.
2. Loosen and remove 01788 Screws (2) from 57373 Adapter.
3. Carefully remove 56672 Adapter making sure no parts fall to the ground. Pry off 54194 Muffler Cap and remove 54195 Muffler (3).
4. Remove 57343 Speed Regulator by detaching 98597 Retaining Ring with a pair of snap ring pliers. Remove 01024 O-Rings with a small screwdriver.
5. Remove tip valve and seal from handle.
To Assemble Valve And Speed Regulator Assemblies:
1. Lightly lubricate 01024 O-Rings and slide them on 57343 Speed Regulator. Install through regulator hole on 56672 Adapter. Place 98597 Retaining
Ring on groove of speed regulator using a pair of retaining ring pliers.
2. Insert valve stem in handle and line up the hole in valve stem with hole in handle. Place 01464 Seal into handle. Insert tip valve so that the metal pin
passes through the hole in the valve stem. Install 01468 Spring (small end first).
3. Install 98597 O-Ring onto 56672 Adapter and place 56673 Gasket onto handle.
4. Gently line-up 56672 Adapter onto handle so no parts shift when tightening. Apply #242 loctite®to 01788 Screws (2), install along with 01211 Lock
Washers (2) and 96421 Flat Washers (2).
Motor Assembly Complete. Please allow 30 minutes for adhesives to cure before operating tool.
Note: Motor should operate at between 850-900 RPM at 6.2 bar (90 PSIG). RPM should be checked with a tachometer. Before operating, we recommend
that 3-4 drops of pneumatic tool oil be placed directly into the air inlet with throttle lever depressed.
Loctite®is a registered trademark of the Loctite Corp.
DYNABRADE®
DYNABRADE, INC., 8989 Sheridan Drive •Clarence, NY 14031-1490 •Phone: [phone] •Fax: [phone] •International Fax: [phone]
DYNABRADE EUROPE S.àr.l., ZoneArtisanale •L-5485 Wormeldange—Haut, Luxembourg •Telephone: [phone] •Fax: [phone]
©DYNABRADE, INC., 2000 PRINTED IN USA
Visit Our Web Site: www.dynabrade.com Email: Customer[email protected]
01189 Safety Lock Lever
• A57375 Valve Stem must be used in
conjunction with this lever to function
properly.
95542 Grease 10 oz.
•Multi-purpose grease for all types
of bearings, cams, gears.
•High film strength; excellent resistance
to water, steam, etc.
•Workable range 0˚ F to 300˚ F.
95541 Push-Type Grease Gun
•One-hand operation.
Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade
Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade