Dynabrade 57923, 57922, 57924, 57925, 57926 Operating, Maintenance And Safety Instructions

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.

Parts Page Reorder No. PD03•11

Effective February, 2003

Supercedes PD00•03R

Air Motor and Machine Parts

Models:

57920 – 4" x 4-5/16" Thin, Vinyl Pad
57922 – 5" Dia. Thick, Vinyl Pad
57923 – 4-1/4" x 4-1/2" Thick, Hook Pad
57924 – 5" Dia. Thick, Hook Pad
57925 – 4-1/4" x 4-1/2" Thick, Vinyl Pad
57926 – 6" Dia. Thick, Vinyl Pad
57927 – 6" Dia. Thick, Hook Pad

Dynabug

“Model T” Sander

A

8

A

T

Adhesive: A

2

= Loctite #271

A8= Loctite #567

Torque: N•m x 8.85 = In. - lbs.

G

Grease: G

1

= Lubriplate

630 AA

1

2

3

4

14

Index Key

No. Part # Description

1 95979 Pin

2 57986 Lever

3 57921 Housing - 57920

57963 Housing - 57922
57964 Housing - 57923
57967 Housing - 57924
57941 Housing - 57925
57911 Housing - 57926
57912 Housing - 57927

4 57988 Inlet Hose Assembly

5 12156 O-Ring

6 95697 Snap Ring

7 01025 O-Ring (2)

8 01477 Valve Stem

9 57064 Speed Regulator

10 95405 Button Head Screw (4)

11 57982 Clip Retainer

12 57980 Spring Clip (2)

(Used On Model-57920 Only)

13 57987 Square Base Plate Assy.

57997 Round Base Plate Assy.

14 96493 Set Screw

15 58092 Spacer

16 57981 Turbine Wheel Assembly

17 97121 O-Ring

18 57983 Base Plate Door

19 57979 Motor Shaft

20 57999 Vinyl Pad - 57920

56249 Vinyl Pad - 57922
57998 Hook Pad - 57923
56248 Hook Pad - 57924
56244 Vinyl Pad - 57925
56269 Vinyl Pad - 57926
56268 Hook Pad - 57927

21 57066 Muffler Body

22 56027 Muffler Insert

23 56028 Muffler Cap

24 01464 Seal

25 01472 Tip Valve

26 01468 Spring

27 01494 Inlet Bushing

28 96457 Male Hose Adapter

29 96458 Hose

30 96456 Female Hose Adapter

31 96455 Hose Assembly

6

7

8

9

10

11

28

31

29

30

12

13

17

16

15

18

19

20

21 23

22

24 26

25 27

G

1

A

2

5

15 N•m

T

23 N•m

T

3.4 N•m

T

KEY

Left Hand

Threads

!

WARNING

2

(PD03•11)

One Year 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 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: Turbine air motor, no oil required.

Operating Instructions:

Warning: Eye, face, sound, respiratory 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.

Maintenance Instructions:

1. Check tool speed regularly with a tachometer. If tool is operating at a higher speed than the RPM marked on the tool, the tool should be

serviced to correct the cause before use.

2. Some silencers on air tools may clog with use. Clean and replace as required.

3. An Air Line Filter-Regulator must be used with this air tool to maintain all warranties. Dynabrade recommends the following: 11402 Air

Line Filter-Regulator – Provides accurate air pressure regulation, two-stage filtration of water contaminants.
Operates 40 SCFM @ 100 PSIG and has 3/8" NPT female ports.

4. Use only genuine Dynabrade replacement parts. To reorder replacement parts, specify the Model #, Serial #, and RPM

of your machine.

5. A Motor Tune-Up Kit (P/N 96169) is available which includes assorted parts to help maintain motor in peek operating condition.

Please refer to Dynabrade’s Preventative Maintenance Schedule for a guide to expectant life of component parts.

6. Mineral spirits are recommended when cleaning the tool and parts. Do not clean tool or parts with any solvents or oils containing acids,

esters, keytones, chlorinated hydrocarbons or nitro carbons.

• Important: User of tool is responsible for following accepted safety codes such as those published by the American National

Standards Institute (ANSI).

• 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.

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.

Safety Instructions:

Products offered by Dynabrade should not be converted or otherwise altered
from original design without expressed written consent from Dynabrade, Inc.