Dynabrade 50343 User manual

11 50767 Pin
12 02673 Rear Bearing Plate
13 02696 Bearing
14 02679 Shield
15 01546 Housing
16 01548 Gasket
17 01461 Lock Nut
18 01558 Collar
19 95523 O-Ring
20 01470 Insert
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
!
See reverse side forAccessories and Important Operating, Maintenance and Safety Instructions.
A
T
O
Adhesive: A2= Loctite #271
A8= Loctite #567
Torque: N•m x 8.85 = In. - lbs.
Oil: O1=Air Lube
Please indicate:
Model #, Serial #, and RPM
when ordering replacement parts.
A8
A8
O1
A8
A2
A8O1
17 N•m
T
28 N•m
T
45 N•m
T
23 N•m
T
150081 Wheel Flange
250083 Spacer
350041 Guard
450785 Adapter
501690 Exhaust Cover
601007 Bearing
753161 Front Bearing Plate
850777 Rotor
901480 Blade (4/pkg.)
10 01476 Cylinder
Index Key
No. Part # Description
32 01642 Air Control Ring
33 95711 Retaining ring
34 95438 O-Ring
35 94521 Muffler Base
36 94524 Sintered Muffler
37 94525 Felt Muffler
38 94522 Muffler Cap
39 95375 O-Ring
40 94526 Spacer
41 94523 InletAdapter
42 94520 MufflerAssembly
21 01462 Safety Lever
22 12132 Pin
23 95558 Retaining Ring
24 01449 Valve Stem
25 95730 O-Ring
26 01024 O-Ring
27 01469 RegulatorAssy.
28 02149 Housing
29 01464 Seal
30 01472 Tip Valve
31 01468 Spring
Index Key
No. Part # Description
5 6 78
9
12
11 13 14 15
16
17
18
19
41
40393837
42
36353433
31
2221
24
25
26 27
302928 32
20
10
KEY
Models:
50343 — 25,000 RPM
.4 Hp/7°/Rear Exhaust
2" Depressed Center Wheel Grinder
Parts Page Reorder No. PD01•75
Effective August, 2001
Supersedes PD96•90
23
Left Hand Threads
Right Hand Threads
41
3
2

2
(PD01•75)
Important Operating, Maintenance and Safety Instructions
Carefully read all instructions before operating or servicing any Dynabrade®Abrasive PowerTool.
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.
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. All Dynabrade Rotary Vane air motors should be lubricated. Dynabrade recommends one drop of air lube per minute for each 10 SCFM (example: if the
tool specifications states 40 SCFM, set the drip rate of your filter-lubricator at 4 drops per minute).
DynabradeAir Lube (P/N 95842: 1pt. 473ml.) is recommended.
4. AnAir Line Filter-Regulator-Lubricator must be used with this air tool to maintain all warranties. Dynabrade recommends the following: 11405Air Line
Filter-Regulator-Lubricator — Provides accurate air pressure regulation, two-stage filtration of water contaminants and micro-mist lubrication of pneumatic
components. Operates 40 SCFM @ 100 PSIG has 3/8" NPT female ports.
5. Use only genuine Dynabrade replacement parts. To reorder replacement parts, please specify the Model #, Serial # and RPM of your machine.
6. AMotor Tune-Up Kit (P/N 96049) is available which includes assorted parts to help maintain motor in peek operating condition.
7. 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.
OneYearWarranty
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).
•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.
•Important: This tool is designed for use with Type 27 wheels 2" diameter and smaller only. Never remove wheel guard.
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.
Model Motor Motor Air Inlet Sound Air Flow Rate Air Pressure Spindle Weight Length Height
Number HP (W) RPM Thread Level CFM/SCFM (LPM) PSIG (Bars) Thread Pound (kg) Inch (mm) Inch (mm)
50343 .4 (289) 25,000 1/4" NPT 87 dB(A) 3/20 (566) 90 (6.2) 3/8"-24 male 1.4 (.6) 8-1/4 (210) 3-1/2 (89)
Additional Specification: Hose I.D. Size 1/4" (8 mm)

3
Mounting Arrangement for Depressed Center Wheels
Important Safety Information
1. Always use eye, face and body protection.
2. Always use wheel guard.
3. For safe use of this tool, always comply with OSHA,
ANSI Standards B7.1 and B186.1.
4. Some wheels are supplied with throwawayadapters
(mounting flanges) attached by the manufacturer.
These adapters should not be used again.
Warning: Do not remove wheel guard.
50041 Wheel GuardAssembly
(Includes 95876 Screw)
Depressed Center Wheel
(not included)
50083 Spacer
50081 Wheel Flange
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. Disconnect tool from power source.
2. Secure air tool in vise using 52296 Repair Collar.
3. Remove wheel guard assembly.
4. With an adjustable pin wrench or 50971 Lock Ring Tool, remove 01690 Exhaust Cover by turning counter-clockwise.
5. Pull motor assembly from housing.
6. Remove 50785 Adapter from rotor shaft.
7. Remove 53161 Front Bearing Plate, cylinder, and blades (4) from rotor. Note: The 01007 Bearing and 53161 Front Bearing Plate are a slip fit onto rotor.
8. Press rotor from 02673 Rear Bearing Plate. Press 02696 Bearing from rear bearing plate.
Motor Disassembly Complete.
Valve Body Disassembly:
1. Reposition motor housing in vise so inlet bushing is facing upwards.
2. Remove 94523 Inlet Bushing and muffler assembly from valve body housing. Using needle nose pliers, remove 01468 Spring, 01472 Tip Valve,
and 01464 Seal.
3. Remove 95711 Retaining Ring from inlet adapter and disassemble muffler assembly.
4. Using a 2.5 mm diameter drift pin and a hammer, tap 12132 Pin out from housing and remove throttle lever.
5. Remove 95558 Retaining Ring and push 01469 Speed RegulatorAssembly from housing.
Tool Disassembly Complete.
Motor Assembly:
Important: Be sure parts are clean and in good repair before assembling.
1. Place 50777 Rotor in padded vise with threaded spindle facing upwards.
2. Install bearing/bearing plate assembly onto rotor.
3. Apply a small amount of Loctite®#271 (or equivalent) to the threads of the adapter that attach to the rotor and tighten 50785 Adapter onto rotor
(torque to 17 N•m/150 in. - lbs.).
4. Install lubricated 01480 Blades (4) into rotor slots. Dynabrade Air Lube P/N 95842 is recommended for lubrication.
5. Install cylinder over rotor. Be sure air inlet holes of cylinder face away from bearing plate and that the pin in the front bearing plate aligns correctly
with the pin-hole in the cylinder.
6. 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. Aloose fit will not achieve the proper preload 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.
7. Secure housing in vise using 52296 Repair Collar.
8. Install motor assembly into housing. Be sure motor drops all the way into housing.
9. Install 01690 Exhaust Cover onto motor housing (torque 28 N•m/250 in. - lbs.).
MotorAssembly Complete. (continued on next page)

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., 2001 PRINTED IN USA
Visit Our Web Site: www.dynabrade.com Email: [email protected]
Dynaswivel®
Swivels 360° at two locations which allows an
air hose to drop straight to the floor, no matter
how the tool is held.
•94300 1/4" NPT.
Optional Accessories
Open-End Wrenches
96076 – 12 mm open-end.
95262 – 14 mm open-end.
52296 Repair Collar
•Specially designed collar for use in vise to
prevent damage to valve body housing
during disassembly/assembly.
96049 Motor Tune-Up Kit
• Includes assorted parts to help maintain
and repair motor.
50971 Lock Ring Tool
• Lock Ring Tool has a 3/8 in. square socket
for use with 3/8 in. drive; breaker bar,
ratchet head, or torque wrenches.
Collet Inserts
•01485 1/4"
•01497 6 mm
•01495 1/8"
•01496 3 mm
Disassembly/Assembly Instructions (continued)
Valve Body Assembly:
1. Install 01469 Speed RegulatorAssembly along with 01449 Valve Stem into housing and secure with 95558 Retaining Ring.
2. Secure valve body in vise using 52296 Repair Collar with air inlet facing upwards.
3. Insert 01464 Seal into housing.
4. Line-up the hole in the 01449 Valve Stem with the hole in the housing (looking past brass bushing). Insert 01472 Tip Valve so that the metal pin passes
through the hole in the valve stem. Install 01468 Spring (small end first).
5. Assemble muffler assembly. Slip 94523 InletAdapter through muffler assembly and secure with 95711 Retaining Ring.
6. Install air control ring into valve body housing.
7. Apply Loctite®#567 PST Pipe Sealant (or equivalent) to threads of inlet bushing and install muffler assembly onto valve body (torque 23 N•m/200 in. - lbs.).
8. Install throttle lever and 12132 Pin. Remove from vise.
ToolAssembly Complete. Please allow 30 minutes for adhesives to cure before operating tool.
Important: Motor should now be tested for proper operation at 90 PSIG. If motor does not operate properly or operates at a higher RPM than marked on the
tool, the tool should be serviced to correct the cause before use.
Loctite®is a registered trademark of Loctite Corp.