Dynabrade 13502, 13503, 13521, 13500, 13504 Operation And Maintenance
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Parts Page Reorder No. PD01•46R
Effective May, 2001
1Hp Dynastraight
Governor Controlled
Air Tool Manual – Safety, Operation and Maintenance
Models:
13500 – 950 RPM, with 13071 Arbor
13501 – 1,800 RPM, with 13071 Arbor
13521 – 1,800 RPM, with 13015 Arbor
13502 – 3,400 RPM, with 13016 Arbor
13503 – 3,400 RPM, with 13017 Arbor
13504 – 3,400 RPM, with 13014 Arbor
13505 – 3,400 RPM, with 13015 Arbor
13506 – 3,400 RPM, with 13071 Arbor
13507 – 4,500 RPM, with 13016 Arbor
13508 – 4,500 RPM, with 13071 Arbor
SAFETY LEGEND
WARNIN
G
WARNING
Read and understand tool manual before
work starts to reduce risk of injury to
operator, visitors, and tool.
WARNING
Eye protection must be worn at all times,
eye protection to conform to ANSI Z87.1.
WARNING
Respiratory protection to be used when exposed to
contaminants that exceed the applicable threshold
limit values required by law.
WARNING
Practice safety requirements. Work alert,
have proper attire, and do not operate tools under
the influence of alcohol or drugs.
WARNING
Ear protection to be worn when exposure to sound,
exceeds the limits of applicable Federal, State or
local statues, ordinances and/or regulations.
WARNING
Air line hazard, pressurized supply lines and flexible
hoses can cause serious injury. Do not use dam-
aged, frayed or deteriorated air hoses and fittings.
Read and understand this tool manual before operating your air tool. Follow all safety rules for the protection of operating personnel as well as adjacent areas. Always operate, inspect and maintain this tool in accordance with the American National Safety
Institute (ANSI) Safety Code for Portable Air Tools – B186.1. For additional safety information, refer to Safety Requirements for the
Use, Care and Protection of Abrasive Wheels – ANSI B7.1, Code of Federal Regulation – CFR 29 Part 1910, European Committee for
Standards (EN) Hand Held Non-Electric Power Tools – Safety Requirements and applicable State and Local Regulations.
SAFETY INSTRUCTIONS
Carefully Read all instructions before operating or servicing any Dynabrade
®
Abrasive Power Tool.
Products offered by Dynabrade are not to be modified, converted or otherwise altered from the original design without expressed written
consent from Dynabrade, Inc.
Tool Intent: Dynastraight Finishing Tools are ideal for surface preparation, cleaning and finishing using abrasive wheels, discs and related accessories.
Do Not Use Tool For Anything Other Than Its Intended Applications.
Training: Proper care, maintenance, and storage of your tool will maximize its performance.
• Employer's Responsibility – Provide Dynastraight operators with safety instructions and training for safe use of tools and accessories.
Accessory Selection:
• Abrasive/accessory RPM(speed) rating MUST be approved for ATLEAST the tool RPM rating.
• Before mounting an accessory, visually inspect for defects. Do not use defective accessories.
• Use only recommended accessories. See back page of manual and Dynabrade catalog.
• Follow tool specifications before choosing size and type of accessory.
• Only use recommended fittings and air line sizes. Air supply hoses and air hose accessories must have a minimum working pressure of 150 PSIG
(10 Bars, g) or 150 percent of the maximum pressure produced in the system, whichever is higher. (See tool Machine Specifications table.)
• DO NOTuse – Grinding Wheels, cut-off wheels, saw blades or other products outside tool intent.
(Continued on next page.)
SAVE THIS DOCUMENT, EDUCATE ALL PERSONNEL
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
To Tool Station
Closed Loop Pipe System
(Sloped in the direction of air flow)
Ball
Valve
Ball
Valve
Filter
Coupler
Plug
Regulator
Lubricator
Air Flow
Drain
Valve
Drain
Valve
Air Tool
Air Compressor
and Receiver
Drain
Valve
Air Hose
90 PSIG MAX
(6.2 Bar)
Air Flow
Refrigerated
Air Dryer
2
Filter
Regulator
Lubricator
90 PSIG
(6.2 Bar)
OPERATING INSTRUCTIONS
Warning: Always wear eye protection. Operator of tool is responsible for following: accepted eye, face, respiratory, hearing and body protection.
Caution: Hand, wrist and arm injury may result from repetitive work, motion and overexposure to vibration.
• Keep hand and clothing away from working end of the air tool.
• Be sure that any loose clothing, hair and all jewelry is properly restrained.
• Secure inlet bushing on air tool with a wrench before attempting to install the air fitting to avoid damaging housing assembly.
• BEFORE MOUNTING AN ACCESSORY, after all tool repairs and whenever a Dynastraight is issued for use, check tool RPM (speed) with tachometer with
air pressure set at 90 PSIG while the tool is running. If tool is operating at a higher speed than the RPM marked on the tool housing, or operating
improperly, the tool must be serviced and corrected before use.
Caution: Tool RPMmust never exceed abrasive/accessory RPM rating. Check accessory manufacturer for details on maximum operating speed or special
mounting instructions.
• With power source disconnected from air tool, mount recommended accessory onto arbor assembly.
• When mounting abrasive or accessory on arbor be sure to follow recommended procedure of the manufacturer.
• Connect air tool to power source. Be careful NOTto depress throttle lever in the process.
Do not expose air tool to inlet pressure above 90 PSIG or (6.2 Bars).
Caution: After installing the accessory, the Dynastraight must be started at a reduced speed to check for good balance. Gradually increase tool speed.
DO NOT USE if tool vibration is excessive. Correct cause, and retest to insure safe operation.
• Make sure that work area is uncluttered, and visitors are at a safe range from the tools and debris.
• Air tools are not intended 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 apply "rough" treatment to it.
• Always work with a firm footing, posture and proper lighting.
• Ensure that sparks and debris resulting from work do not create a hazard.
• The tool is rear exhaust. Exhaust may contain lubricants, vane material, bearing grease, and other materials flushed thru the tool.
Report to your supervisor any condition of the tool, accessories, or operation you consider unsafe.
Air System
1 DROP/MIN.
20 SCFM
LUBRICATOR SETTING
• Dynabrade Air Power Tools are designed to
operate at 90 PSIG (6.2 Bar/620 kPa) maximum
air pressure at the tool inlet, when the tool is
running. Use recommended regulator to control
air pressure.
• Ideally the air supply should be free from moisture.
Incorporating a refrigerated air dryer after the
compressor and drain valves at each tool station
(as shown) further reduces moisture from
condensation in the air supply.
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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
Disassembly Instructions - 1 Hp Dynastraight
Important: Manufacturer’s warranty is void if tool is disassembled before warranty expires.
Disconnect tool from power source before tool repair.
Motor Disassembly:
1. Remove arbor assembly from front of tool.
2. Using 51989 Repair Collar or padded vise, secure front end of housing using machined flats on the silver ring.
3. Remove planetary gear casing from housing (twist counterclockwise).
4. Remove 04014 Set Screw(s) and pull planetary carrier assembly(s) from planetary gear casing.
5. Press planetary carrier assembly from rear 02552 Bearing. Remove ring gear and gears from planetary carrier(s).
6. Secure planetary carrier in vise and remove 04032 Spindle Nut (twist counterclockwise).
7. Press planetary carrier from front 02552 Bearing.
Note: On double planetary models slide, bearing/carrier from 53694 Gear Casing. Then press planetary carrier through 02552
bearing. Press 53678 Gear Shaft from carrier assembly. Remove ring gear from the housing assembly.
8. Remove remaining tool assembly from vise.
9. Remove 96498 Wave Spring. (Single planetary models only.)
10. Pull motor assembly, and remove 53620 Motor Adapter with 95438 O-Ring.
11. Remove governor assembly by using a slotted screw driver. (LEFT HANDthread)
12. Secure 51925 Cylinder and place a 1/8" (3 mm) drift pin to the base of the internal thread and press the 51921 Rotor from
the 02057 Rear Bearing.
13. Slide 02057 Rear Bearing from 51923 Rear Bearing Plate.
14. Remove 51925 Cylinder and 51926 Blades.
15. Press rotor though 54520 Bearing, 51922 Front Bearing Plate and 51927 Rotor Spacer.
16. Slide 54520 Bearing and shims from 51922 Front Bearing Plate.
Motor Disassembly Complete.
Housing Disassembly:
1. Secure housing using 51989 Repair Collar (see back cover for Optional Accessories).
2. Remove 51937 Inlet Bushing (twist counterclockwise).
3. Remove 51943 Spring, 96442 O-Ring, 51940 Spacer and 51939 Silencer Plate from 51937 Inlet Bushing.
4. Remove 51941 Spring, 51942 Baffle, 51944 Tip Valve and 51945Valve Seat.
5. Remove housing and 51989 Repair Collar and lay collar on bench with flange facing down so it is supporting throttle lever. Place a 3/32"
(2.4 mm) drift pin on 96444 Pin and tap thru housing.
6. Remove 51946 Valve Stem Assembly.
7. Remove 96443 O-Ring from 51946 Valve Stem Assembly.
Housing Disassembly Complete.
Assembly Instructions - 1 Hp Dynastraight
Motor Assembly:
Important: Be sure parts are clean and in good repair before assembling. Follow grease, oil and torque specifications.
1. Place rotor into padded vise with male thread or spline facing upwards.
2. Slip 51927 Rotor Spacer over rotor shaft and down against rotor body face.
3. Press 96441 Coiled Pin into 51922 Front Bearing Plate. Make certain, coiled pin does not protrude beyond
internal bearing surface.
4. Place a .002" shim into the base of 51922 Front Bearing Plate as an initial spacing and slide 54520 Bearing to the front plate
base. Note: 51951 Shim Pack contains .001" and .002" shims.
5. Press bearing/bearing plate assembly onto rotor.
6. Check clearance between rotor and front bearing plate by using a .001" feeler gauge. Clarence should be between .001" – .0015".
Adjust clarence by repeating steps 4 and 5 with different shims if necessary.
7. Once proper rotor gap clarence is achieved, install well lubricated 51926 Blades (4) into rotor slots. Dynabrade
recommends lubricating blades with 95842 Air Lube.
8. Install 51925 Cylinder over rotor and front plate raised boss. Align coiled pin on front to cylinder slot.
9. Press 96441 Coiled Pin into blind hole on 51923 Rear Bearing Plate. Press (2) 96445 Coiled Pins into the back side of
rear bearing plate.
10. Peel backing off 51924 Gasket and align it firmly in place onto 51923 Rear Bearing Plate.
11. Place 51923 Rear Bearing Plate over rotor mandrel and insert raised boss on rear bearing plate into cylinder diameter, while inserting
short coiled pin into cylinder slot. Be sure inlet slot on rear bearing plate line up with inlet slot on cylinder. To correct alignment flip
cylinder end to end and repeat step 8 for correct assembly.
(Continued on next page.)
5
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
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