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For Serial No. 9J1264 and Higher
Models:
51420 – 3-1/2" 3,200 RPM
51425 – 4" 5,000 RPM
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
Index Key
No. Part # Description
25 01461 Lock Nut
1 50126 Backing Pad - 51420
50132 Backing Pad - 51425
26 01558 Collar
2 50781 Rear Exhaust Cover
27 95523 O-Ring
3 50782 Adapter
28 01470 Insert
4 54552 Bearing (2)
29 02109 Housing - 51420
5 54472 Gear Shaft (2)
02110 Housing - 51425
6 06213 5,000 RPM Gear (2)
30 12132 Pin
54519 3,200 RPM Gear (2)
31 01448 Throttle Lever
7 50786 3,200 RPM Carrier
01462 Safety Lock Lever
50787 5,000 RPM Carrier
32 95558 Retaining Ring
8 54468 Ring Gear
33 01449 Valve Stem
9 50778 Spacer
34 95730 O-Ring
10 02649 Bearing
35 01024 O-Ring
11 54529 Shim Pack (3/pkg.)
36 01469 Speed Regulator
12 01478 Front End Plate
37 94519 Muffler Assembly
13 50767 Pin (2)
38 01464 Seal
14 01479 Spacer
39 01472 Tip Valve
15 Rotor
40 01468 Spring
54553 5,000 RPM
41 01564 Air Control Ring
54554 3,200 RPM
42 95711 Retaining Ring
16 01480 Blade (4/pkg.)
43 95438 O-Ring
17 01476 Cylinder
44 94521 Muffler Base
18 02673 Rear Bearing Plate
45 94528 Felt Muffler
19 02696 Bearing
46 94522 Muffler Cap
20 02679 Shield
47 95375 O-Ring
21 01041 Grease Fitting
48 94526 Spacer
22 50784 Set Screw
49 94523 Inlet Adapter
23 50776 Motor Housing
24 01548 Gasket
O
A
T
G
'
s Warning/Safety Operating Instructions for more complete safety information. See inside for Important Operating, Maintenance and Safety Instructions.
A
G
8
1
22
21
20
A
8
A
8
23
24
Left Hand Threads
T
25
Right Hand
Threads
26
27
Hex Wrench
96401 – 2mm Hex.
Open-End Wrench
95262 – 14mm Open-End.
KEY
Oil: O
= Air Lube
1
Adhesive: A
= Loctite #271
2
A
= Loctite #567
8
Torque: N•m x 8.85 = In. - lbs.
Grease: G
= Lubriplate 630 AA
1
19
13
17
15
O
18
16
1
45 N•m
31
30
32
28
29
33
A
8
34
36
38
35
Parts Page Reorder No. PD02•36
.4 Hp/7°/Rear Exhaust
Disc Sander
13
11
9
4
7
14
12
10
8
40
41
39
42
43
44
45
Effective July, 2002
Supersedes PD97•60
Air Motor and Machine Parts
G
28 N•m
T
1
6
4
3
2
1
G
1
A
T
5
17 N•m
2
G
1
T
23 N•m
A
O
8
1
46
47
48
49
37
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Related Manuals for Dynabrade 51420
Summary of Contents for Dynabrade 51420
- Page 1 Warning/Safety Operating Instructions for more complete safety information. See inside for Important Operating, Maintenance and Safety Instructions. Index Key No. Part # Description 28 N•m 25 01461 Lock Nut 1 50126 Backing Pad - 51420 50132 Backing Pad - 51425 26 01558 Collar 2 50781 Rear Exhaust Cover 27 95523 O-Ring...
- Page 2 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 state 40 SCFM, set the drip rate of your filter-lubricator at 4 drops per minute).
- Page 3 4-5 and shim as required. 6. Apply the 95842 Dynabrade Air Lube (10W/NR or equivalent) to the 01480 Blades (4) and install these into the slots in the rotor. 7. Install the 01476 Cylinder over the rotor so that the air inlet opening of the cylinder will align with the air inlet opening of the 02676 Rear Bearing Plate.
- Page 4 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. Before operating, place 2-3 drops of Dynabrade Air Lube (P/N 95842) directly into air inlet with throttle lever depressed. Operate tool for 30 seconds to determine if tool is operating properly and to allow lubricating oils to properly penetrate motor.
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