Dynabrade 57240 Instructions

Motor Disassembly/Assembly Instructions

11. Secure motor housing in vise, using 57092 Collar or padded jaws. Slide motor assembly into secured housing. Note: With handle pointing toward you
while looking into motor bore, be certain line-up pin enters slot to right side of center.
12. Tighten 57332 Lock Ring with 56058 Lock Ring Tool to 34 N•m/300 in. - lbs. Attach shroud and weight-mated sanding pad.
13. Apply one drop of #271 Loctite® (or equivalent) to threads of 96166 Set Screw and reinstall into 57332 Lock Ring. Do not over tighten.
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) , 96421 Flat Washers (2), and 01211 Lock Washers (2) from 56672 Adapter.
3. Carefully remove 56672 Adapter making sure no parts fall to the ground. On non-vacuum and central vacuum models: pry off 54194 Muffler Cap and
remove 54195 Muffler (3).
4. Remove 57532 Non-Regulator Plug by detaching 95558 Retaining Ring with a pair of snap ring pliers. Remove 01024 O-rings with a small screwdriver or
razor. If replacement is required.
5. Remove tip valve assembly from housing.
To Reassemble Valve And Speed Regulator Assemblies:
1. Lightly lubricate 01024 O-rings and slide them on 57532 Non-Regulator Plug. Install through regulator hole on 57373 Adapter. Place 95558 Retaining Ring
on groove of speed regulator using a pair of retaining ring pliers.
2. Line-up hole in valve stem with inlet hole in handle. Place 01464 Seal in handle. Insert 01472 Tip Valve so that metal pin goes through the valve stem.
Place 01468 Spring into the housing, small end first.
3. Gently line-up 56672 Adapter onto handle so no parts shift when tightening. Insert 01211 Lock Washerw (2) and 96421 Flat Washer (2) on 01788 Screw,
then apply a small amount of #940 Hernon (or equivalent) to threads of 01788 Screw and tighten to 30 N•m/265 in. - lbs. Repeat with remaining screw.
Motor assembly is complete. Please allow 30 minutes for adhesives to cure before operating tool.
Important: Motor should operate 5,500 RPM minimum when under the load defined in the Maintenance Instructions. Before operating, we recommend that 3-
4 drops of Dynabrade Air Lube or pneumatic tool oil be placed directly into the air inlet with throttle lever depressed. Operate tool for 30 seconds under load to
determine if machine is operating properly and to allow lubricating oils to properly dispense through machine.
Loctite® is a registered trademark of the Loctite Corp.
Machine Pad Orbit Diameter Length
Description Inch (mm) Inch (mm) Inch (mm) Inch (mm)
57240 5" (127) .55 (14) 10-1/4" (260) 4-1/2"(114)
Additional specifications: Spindle Thread 5/16"-24 Female • Air Inlet Thread 1/4" (6 mm) NPT • Hose Size 3/8" (10 mm)

Accessories

96122 Motor Tune-Up Kit:
• Includes assorted parts to help
maintain motor in tip-top shape.
96405 Motor Repair Kit: (not pictured)
• Contains special tools for
Disassembly/Assembly of machine.
80030 Training and Maintenance Test Equipment Kit:
• 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.
• 94315 Pressure Gage to ensure peak operating performance.
• 95842 Air Lube formulated for pneumatic tools. Prevents rust and formation of
gum/sludge for longer tool operation with greater power and less downtime.
• 96368 Tachometer used to measure tool RPM.
Filter-Regulator-Lubricator
11405: 40 CFM @ 100 PSI, 3/8" NPT female ports.
• Provides accurate air pressure regulation, two stage filtration of water/contaminants and
lubrication of pneumatic components.
Visit our new Web Site On-Line: http://www.dynabrade.com
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 • Fax: 352 76 84 95
© DYNABRADE, INC., 1999
(continued)
Height Weight Air Flow Rate Sound Motor
Pound(kg) SCFM (LPM) Level HP (W)
2.7 lbs. (1.2) 23 (650) 79 dBA .36 (270)
01188 Safety Lock Lever 96431 Tune-Up Video
DYNABRADE
Models:
57240 – 5"
WARNING
!
Index Key
No. Part Description
1 5" Pad (not included)
2 57369 Lip Seal Shroud
3 95343 Set Screw
4 57069 Balancer Shaft
5 95630 Snap Ring
6 95628 Washer
7 56053 Seal
8 56052 Bearing
9 57323 Shaft Balancer
10 54673 Key
11 02695 Bearing
12 56046 Lock Ring
13 54630 Front Bearing Plate
14 54671 Rotor
Air Pressure
15 54674 Blade (5)
PSI (Bars)
16 54631 Cylinder (incl. 95885 Pin)
90 (6.2)
17 54629 Rear Bearing Plate
18 01206 Bearing
19 95626 Retaining Ring
20 57219 Housing
21 95523 O-Ring (2)
22 57382 Gasket
23 56671 Handle
24 95886 Flat Washer (4)
25 01211 Lock Washer (4)
26 97010 Screw (4)
27 96123 Screw
28 57396 Valve Stem
29 01464 Seal (2)
30 01472 Tip Valve
31 01468 Spring
32 56673 Gasket
33 56672 Adapter
34 95558 Snap Ring
35 96126 O-Ring
36 57321 Throttle Lever
37 01017 Pin
38 01494 Inlet Bushing
39 96421 Flat Washer (2)
40 01211 Lock Washer (2)
41 01788 Screw (2)
42 54199 Muffler Seat
43 54195 Muffler (3)
44 54194 Muffler Cap
45 01024 O-Ring (2)
46 57532 Non-Regulator Plug
®
PRINTED IN USA
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.
26 T L
36
2 4
37
28
24
27
25
21
20
22
19
18
17
16
14
15
13
T
12
4
11
9
10
8 7
L
2
6 5
4
L 3
L
2
2
2
1
Parts Page Reorder No. PD99•33
Effective July, 1999
Supercedes PD99•22
5" Dynabuffer
Air Motor and Machine Parts.
T
2
T L
3 2
40
L
38
4
29
39
41
35
34
44
33 42
43
31
29
32
30
23
45
46
KEY
Loctite/Hernon:
L
L = Loctite #271
2
L = Hernon #940
2
Torque: N•m x 8.85 = In. - lbs.
T
T = 3.38 N•m, T = 23 N•m,
2 3
T = 34 N•m
4