SECTION
MANUAL
M12
15
OPERATOR’S MANUAL
INCLUDING:ĂOPERATION,ĂINSTALLATIONĂ&ĂMAINTENANCE
Released: 05-75
Revised: 09-01-00
Form: 717-2
“000–1” SERIES RIGHT–ANGLE GRINDER/SANDER
MODELS 8479–1–( ), 8479–2–( ), 8480–1–( ) AND 8480–2–( )
ARO is not responsible for customer modification of tools for applications on which ARO
was not consulted.
IMPORTANT SAFETY INFORMATION ENCLOSED.
READ THIS MANUAL BEFORE OPERATING TOOL.
IT IS THE RESPONSIBILITY OF THE EMPLOYER TO PLACE THE INFORMATION
IN THIS MANUAL INTO THE HANDS OF THE OPERATOR.
FAILURE TO OBSERVE THE FOLLOWING WARNINGS COULD RESULT IN INJURY.
PLACING TOOL IN SERVICE
USING THE TOOL
•
•
•
•
Always wear eye protection when operating or
performing maintenance on this tool.
Always wear hearing protection when
operating this tool.
Keep hands, loose clothing and long hair
away from rotating end of tool.
Anticipate and be alert for sudden changes in
motion during start up and operation of any
power tool.
Keep body stance balanced and firm. Do not
overreach when operating this tool. High
reaction torques can occur at or below the
recommended air pressure.
•
Always operate, inspect and maintain this tool
in accordance with American National
Standards Institute Safety Code for Portable
Air Tools (ANSI B186.1).
For safety, top performance, and maximum
durability of parts, operate this tool at 90 psig
(6.2 bar/620 kPa) maximum air pressure at the
inlet with 5/16” (8 mm) inside diameter air
supply hose.
Always turn off the air supply and disconnect
the air supply hose before installing, removing
or adjusting any accessory on this tool, or
before performing any maintenance on this
tool.
•
•
•
•
•
Tool accessories may continue to rotate
briefly after throttle is released.
•
•
Do not use damaged, frayed or deteriorated
air hoses and fittings.
Air powered tools can vibrate in use.
Vibration, repetitive motions or uncomfortable
positions may be harmful to your hands and
arms. Stop using any tool if discomfort,
tingling feeling or pain occurs. Seek medical
advice before resuming use.
Use accessories recommended by ARO.
This tool is not designed for working in
explosive atmospheres.
Be sure all hoses and fittings are the correct
size and are tightly secured. See Dwg.
TPD905–1 for a typical piping arrangement.
Always use clean, dry air at 90 (6.2 bar/
620 kPa) psig maximum air pressure. Dust,
corrosive fumes and/or excessive moisture
can ruin the motor of an air tool.
Do not lubricate tools with flammable or
volatile liquids such as kerosene, diesel or jet
fuel.
•
•
•
•
•
•
This tool is not insulated against electric
shock.
Do not remove any labels. Replace any
damaged label.
The use of other than genuine ARO replacement parts may result in safety hazards, decreased tool
performance, and increased maintenance, and may invalidate all warranties.
Repairs should be made only by authorized trained personnel. Consult your nearest ARO Authorized
Servicenter.
For parts and service information, contact your local ARO distributor, or the Customer Service Dept. of the Ingersoll–Rand
Distribution Center, White House, TN at PH: (615) 672–0321, FAX: (615) 672–0801.
ARO Tool Products
Ingersoll–Rand Company
1725 U.S. No. 1 North D P.O. Box 8000 D Southern Pines, NC 28388–8000
E2000 INGERSOLL–RAND COMPANY D PRINTED IN U.S.A.
M12
15
LUBRICATION
Do not mark any nonmetallic surface on this tool
with customer identification codes. Such actions
could affect tool performance.
ARO Part #
Description
Where Used
29665
1 qt. Spindle Oil
Air Motor
36460
33153
4 oz. Stringy
Lubricant
‘‘O” Rings & Lip Seals
Gears and Bearings
5 lb. ‘‘EP” – NLGI
#1 Grease
MAIN LINES 3 TIMES
AIR TOOL INLET SIZE
Always use an air line lubricator with these tools.
We recommend the following Filter–Lubricator–
Regulator Unit:
TO
AIR
SYSTEM
ARO Model C28231–810
TO
AIR
TOOL
After each 8 hours of tool operation – Fill lubricator
reservoir of recommended F.R.L. with spindle oil
(29665). If an in line or air line lubricator is not used,
apply several drops of spindle oil (29665) in air inlet.
LUBRICATOR
FILTER
REGULATOR
After each 40 hours of tool operation – Flush tool
with a solution of three (3) parts cleaning solvent to
one (1) part spindle oil.
BRANCH LINE 2 TIMES
AIR TOOL INLET SIZE
DRAIN REGULARLY
COMPRESSOR
After each 160 hours of tool operation – Lubricate
gearing of tool thru grease fitting with ARO 33153
grease or equivalent. Gearing should contain
approximately 1/16 oz. (1.8 g) of grease. Pack
bearings with NLGI #1 ‘‘EP” grease (33153).
(Dwg. TPD905–1)
3
M12
15
1/4 – 20 THREAD
LIP OF SEAL THIS SIDE
(ATP–4)
22 INCLUDES ROLL PIN (2) Y178–1
31 USED WITH MODELS 8480–1–( ) AND 8480–2–( )
32 PRESS TO A DEPTH OF .125” ꢀ.015”.
15/24 INSTALL WITH SHIELDED SIDE OUT
33 ASSEMBLE WITH THREAD ADHESIVE
26 INCLUDES BEARING 43902 AND GREASE
FITTING 35967
27 ASSEMBLE WITH THREAD ADHESIVE
AND TORQUE TO 19 – 21 FT LBS.
34/35 USED WITH MODELS 8479–1–( ) AND 8479–2–( )
AND TORQUE TO 15 – 18 FT LBS.
30 USED WITH MODELS 8479–1–( ) AND 8479–2–( )
NOT SHOWN
48176–1 WARNING LABEL (STANDARD MODELS)
49883 WARNING LABEL (–EU MODELS)
MODEL
NUMBER
R.P.M. LEVER
HEAD
PINION
HOUSING
GEAR
COLLET CAPACITY
(ITEM 4) (ITEM 5) (ITEM 25) (ITEM 26) (ITEM 28) (ITEM 34)
8479–1
13,000
40269
45953
40269
45953
40269
45953
40269
45953
44653
49945
44653
49945
44653
49945
44653
49945
44643
44643
44640
44640
44643
44643
44640
44640
44644
49968
44644
49968
44644
49968
44644
49968
44642
44642
44696
44696
44642
44642
44696
44696
41750–3
41750–12
41750–3
41750–12
1/4”
6 mm
1/4”
8479–1–EU 13,000
8479–2 20,000
8479–2–EU 20,000
8480–1 13,000
8480–1–EU 13,000
8480–2 20,000
8480–2–EU 20,000
6 mm
MODELS WITH –EU SUFFIX ARE ‘‘EC” COMPLIANT MODELS.
4
M12
15
PART NUMBER FOR ORDERING
PART NUMBER FOR ORDERING
1
2
3
4
5
6
7
8
9
Inlet Adapter
Air Diffuser . . . . . . . . . . . . . . . . . . . . . . . . .
Roll Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle Lever (for –EU models see page 6) See table
Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lock Nut . . . . . . . . . . . . . . . . . . . . . . . . . . .
Retaining Ring . . . . . . . . . . . . . . . . . . . . . .
Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‘‘O” Ring . . . . . . . . . . . . . . . . . . . . . . . . . . .
44652–1
44649
Y178–44
MOTOR ASSEMBLY (includes items 13 thru 24)
25 Bevel Pinion . . . . . . . . . . . . . . . . . . . . . . . .
26 Housing . . . . . . . . . . . . . . . . . . . . . . . . . . .
27 Nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28 Bevel Gear . . . . . . . . . . . . . . . . . . . . . . . . .
29 Ball Bearing . . . . . . . . . . . . . . . . . . . . . . . .
30 Collet Shaft . . . . . . . . . . . . . . . . . . . . . . . .
31 Drive Shaft . . . . . . . . . . . . . . . . . . . . . . . . .
32 Lip Seal . . . . . . . . . . . . . . . . . . . . . . . . . . .
33 Bearing Lock Nut . . . . . . . . . . . . . . . . . . .
34 Collet . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
35 Collet Nut . . . . . . . . . . . . . . . . . . . . . . . . . .
44645
See table
See table
43749
See table
43750
44646
45171
41447
43909
See table
41751
See table
44654
Y110–24
39382
Y325–6
43244
31389
33920
Y8-463-C
Y48–6
42516
43150
43185
41638
44641
43149
Y178–1
43152
43184
42515
10 Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11 Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12 Cover Screw . . . . . . . . . . . . . . . . . . . . . . .
13 Screw . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14 Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15 Ball Bearing . . . . . . . . . . . . . . . . . . . . . . . .
16 Wavy Spring . . . . . . . . . . . . . . . . . . . . . . .
17 Rear End Plate . . . . . . . . . . . . . . . . . . . . .
18 Rotor Blade (4 req’d) . . . . . . . . . . . . . . . .
19 Rotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20 Spacer . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21 Roll Pin (2 req’d) . . . . . . . . . . . . . . . . . . . .
22 Cylinder (includes item 21) . . . . . . . . . . .
23 Front End Plate . . . . . . . . . . . . . . . . . . . . .
24 Ball Bearing . . . . . . . . . . . . . . . . . . . . . . . .
OPTIONAL
Sanding Pad (2”) . . . . . . . . . . . . . . . . . . . .
Sanding Pad (3”) . . . . . . . . . . . . . . . . . . . .
Collet (1/8” cap.) . . . . . . . . . . . . . . . . . . . .
Collet (3/16” cap.) . . . . . . . . . . . . . . . . . . .
Collet (3 mm cap.) . . . . . . . . . . . . . . . . . . .
Collet (6 mm cap.) . . . . . . . . . . . . . . . . . . .
NOT SHOWN
Wrench (furnished with models
8479–1–( ) and 8479–2–( ) ) . . . . . . . . . .
Wrench (furnished with all models) . . . .
44648
44647
41750–1
41750–2
41750–11
41750–12
37167
39785
DISASSEMBLY/ASSEMBLY INSTRUCTIONS
RIGHT–ANGLE ASSEMBLY
–
–
–
Lubricate bearing (29) with ARO 33153 grease.
Press bearing (29) onto shaft (30 or 31).
Assemble gear (28) and nut (27) to shaft. Tighten to 15 – 18
ft lbs.
Assemble seal (32) to lock nut (33). NOTE: Press seal to a
depth of .125” ꢀ.015.
Assemble lock nut (33), with seal (32), to shaft.
Lubricate bearing in housing and gear with ARO 33153
grease.
Always wear eye protection when operating or perform-
ing maintenance on this tool.
Always turn off the air supply and disconnect the air
supply hose before installing, removing or adjusting any
accessory on this tool or before performing any mainte-
nance on this tool.
–
–
–
–
–
Assemble shaft and components to housing and secure
with lock nut (33).
Assemble collet (34) to shaft and secure with collet nut (35).
• Never apply excessive pressure by a holding device which
may cause distortion of a part.
• Apply pressure evenly to parts which have a press fit.
• Apply even pressure to the bearing race that will be press
fitted to the mating part.
MOTOR DISASSEMBLY
• Use correct tools and fixtures when servicing this tool.
• Don’t damage ‘‘O” rings when servicing this tool.
• Use only genuine ARO replacement parts for this tool. When
ordering, specify part number, description, tool model num-
ber and serial number.
–
–
–
Remove head section. Remove motor from housing.
Remove gear (25) from rotor.
Tap threaded end of rotor with a soft face hammer; motor will
come apart. NOTE: Bearings are light press fit in end plates
and press fit on rotor.
–
NOTE: Screw (13) is assembled to rotor with a hard drying
adhesive and should not be disassembled unless it is nec-
essary to replace a worn part.
RIGHT–ANGLE DISASSEMBLY
–
–
–
Remove lock nut (33). Remove shaft and components.
Remove nut (27), gear (28) and bearing (29).
Remove collet nut (35) and collet (34).
5
M12
15
DISASSEMBLY/ASSEMBLY INSTRUCTIONS
MOTOR ASSEMBLY
THROTTLE DISASSEMBLY
–
Assemble wavy spring (16) to end plate and assemble end
plate to rotor (19).
–
Remove screw (12), washer (11), spring (10) and valve (8)
with ‘‘O” ring (9).
–
–
Lubricate bearing (15) with ARO 33153 grease.
Press bearing (15) on rotor and into end plate (17). NOTE:
Press on inner race of bearing. Assemble with shielded side
out. Outside face of inner race must be flush with end of ro-
tor.
Assemble washer (14) and screw (13) to rotor using a good
grade of thread adhesive.
Coat rotor blades (18) with ARO 29665 spindle oil and as-
semble to rotor slots – straight side out.
Coat i.d. of cylinder (22) with ARO 29665 spindle oil and as-
semble over rotor. NOTE: Air inlet holes in end of cylinder
must be aligned with air inlet holes in end plate (17).
Lubricate bearing (24) with ARO 33153 grease.
Assemble bearing (24) to end plate (23), shielded side out.
Assemble spacer (20) and end plate (23), with bearing, to
rotor. NOTE: Press on inner race of bearing. Be sure rotor
turns without binding.
–
–
–
Remove inlet adapter (1) and air diffuser (2).
To remove lock nut (6), remove retaining ring (7).
To remove lever (4), remove roll pin (3).
THROTTLE ASSEMBLY
–
–
–
–
–
Lubricate and assemble ‘‘O” ring (9) to valve stem (8).
Assemble valve stem (8) and spring (10) to head and secure
with washer (11) and screw (12).
Assemble lock nut (6) to head. Secure with retaining ring (7).
Assemble air diffuser (2) and inlet adapter (1) to head.
Assemble lever (4) to head, securing with roll pin (3).
–
–
–
–
–
–
–
–
Assemble gear (25) to rotor. Lubricate gear with ARO 33153
grease.
Assemble motor to housing.
45953 LOCK–OFF LEVER ASSEMBLY
45777 ARM
45952 LEVER
Y178–5 ROLL PIN
45778 SPRING
(ATP–2)
6
M12
15
7
PN 49999–324
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