Ingersoll Rand Grinder 84791 User Manual

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  
‘‘ORings & 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 FilterLubricator–  
Regulator Unit:  
TO  
AIR  
SYSTEM  
ARO Model C28231810  
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 ‘‘EPgrease (33153).  
(Dwg. TPD9051)  
3
 
M12  
15  
1/4 20 THREAD  
LIP OF SEAL THIS SIDE  
(ATP4)  
22 INCLUDES ROLL PIN (2) Y1781  
31 USED WITH MODELS 84801( ) AND 84802( )  
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 84791( ) AND 84792( )  
AND TORQUE TO 15 18 FT LBS.  
30 USED WITH MODELS 84791( ) AND 84792( )  
NOT SHOWN  
481761 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)  
84791  
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  
417503  
4175012  
417503  
4175012  
1/4”  
6 mm  
1/4”  
84791EU 13,000  
84792 20,000  
84792EU 20,000  
84801 13,000  
84801EU 13,000  
84802 20,000  
84802EU 20,000  
6 mm  
MODELS WITH EU SUFFIX ARE ‘‘ECCOMPLIANT 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
‘‘ORing . . . . . . . . . . . . . . . . . . . . . . . . . . .  
446521  
44649  
Y17844  
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  
Y11024  
39382  
Y3256  
43244  
31389  
33920  
Y8-463-C  
Y486  
42516  
43150  
43185  
41638  
44641  
43149  
Y1781  
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 reqd) . . . . . . . . . . . . . . . .  
19 Rotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
20 Spacer . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
21 Roll Pin (2 reqd) . . . . . . . . . . . . . . . . . . . .  
22 Cylinder (includes item 21) . . . . . . . . . . .  
23 Front End Plate . . . . . . . . . . . . . . . . . . . . .  
24 Ball Bearing . . . . . . . . . . . . . . . . . . . . . . . .  
OPTIONAL  
Sanding Pad (2) . . . . . . . . . . . . . . . . . . . .  
Sanding Pad (3) . . . . . . . . . . . . . . . . . . . .  
Collet (1/8cap.) . . . . . . . . . . . . . . . . . . . .  
Collet (3/16cap.) . . . . . . . . . . . . . . . . . . .  
Collet (3 mm cap.) . . . . . . . . . . . . . . . . . . .  
Collet (6 mm cap.) . . . . . . . . . . . . . . . . . . .  
NOT SHOWN  
Wrench (furnished with models  
84791( ) and 84792( ) ) . . . . . . . . . .  
Wrench (furnished with all models) . . . .  
44648  
44647  
417501  
417502  
4175011  
4175012  
37167  
39785  
DISASSEMBLY/ASSEMBLY INSTRUCTIONS  
RIGHTANGLE 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.  
Dont damage ‘‘Orings 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.  
RIGHTANGLE 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 ‘‘Oring (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 ‘‘Oring (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 LOCKOFF LEVER ASSEMBLY  
45777 ARM  
45952 LEVER  
Y1785 ROLL PIN  
45778 SPRING  
(ATP2)  
6
 
M12  
15  
7
 
PN 49999324  
 

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