ARO 50 Series User manual

ARO@ OPERATOR’S MANUAL
INCLUDING:OPERATION,INSTALLATION& MAINTENANCE Form 49999-055
50 SERIES POWER UNIT
Model 8133
3200 R.P.M.
Edition 3
April 2000
10589471
WARNING
READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
OPERATING OR SERVICING THIS EQUIPMENT.
FAILURE TO OBSERVE THE FOLLOWING WARNINGS COULD RESULT IN INJURY.
Pneumatic tools should always be installed and used in accor-
dance with A.N.S.I. 8186.1 “Safety Code For Portable Air Tools.”
Operate this motor at 90 p.s.i.g. (6.2 bar) maximum air pres-
sure at the air inlet of the motor.
Disconnect air supply from motor before removing/installing
bit, socket or device attached to motor or performing mainte-
nance procedures.
Keep hands, clothing and long hair away from rotating end of
motor.
Anticipate and be alert for sudden changes in motion during
start up and operation of any power motor.
Never exceed rated r.p.m. of motor.
Wear suitable eye and hearing protection while operating mo-
tor.
Motor shaft can continue to rotate briefly after throttle is re-
leased.
Do not lubricate motor with flammable or volatile liquids such
as kerosene, diesel or jet fuel.
Do not remove any labels. Replace any damaged label.
Use only accessories recommended by ARO.
Repeated prolonged operator exposure to vibrations which may
be generated in the use of certain hand-held motors may produce
Raynaud’s phenomenon, commonly referred to as Whitefinger
disease. The phenomenon produces numbness and burning
sensations in the hand and may cause circulation and nerve dam-
age as well as tissue necrosis. Repetitive users of hand-held mo-
tors who experience vibrations should closely monitor duration of
use and their physical condition.
l The use of other than genuine AR0 replacement parts may
result in safety hazards, decreased motor performance and
increased maintenance and may invalidate all warranties.
l AR0 is not responsible for customer modification of motors for
applications on which AR0 was not consulted.
l Motor maintenance and repair should be performed by autho-
rized, trained, competent personnel. Consult your nearest
AR0 authorized servicenter.
l It is the responsibility of the employer to place the information
in this manual into the hands of the operator.
For parts and service information, contact your local AR0 distributor, or the Customer Service Dept. of the Ingersoll-Rand Distribution
Center, White House, TN at PH: [phone], FAX: [phone].
AR0 Tool Products
AR0
Ingersoll-Rand Company
1725 U.S. No. 1 North 0 P.O. Box 8000 0 Southern Pines, NC 2838843000
©2000 Ingersoll-Rand Company. PRINTED IN U.S.A.

FAILURETOOBSERVETHE FOLLOWINGWARNINGSCOULDRESULTIN INJURY.
WARNING
Wear eye protection when
operating or performing
maintenance on this motor.
WARNING
Turn off air supply and disconnect
air supply hose before installing,
removing or adjusting any
accessory on this motor, or before
performing any maintenance on
this motor.
WARNING
Do not carry the motor by the
hose.
WARNING
Do not overreach when operating
this motor. Keep body stance
balanced and firm.
NOTICE
PN 48176-i LABEL
This label must appear on
the motor at all times. If it
is lost or damaged, a re-
placement label is avail-
able at no cost.
WARNING I
Wear hearing protection when
operating this motor.
WARNING
Air powered motors can vibrate in
use. Vibration, repetitive motions
or uncomfortable positions may
be harmful to your hands and
arms. Stop using any motor if
discomfort, tingling feeling or
pain occurs. Seek medical advice
before resuming use.
WARNING
Do not use damaged, frayed or
deteriorated air hoses and
WARNING
Operate at 90 p.s.i.g.
(6.2 bar/620 kPa)
maximum air pressure.
WARNING = Hazards or unsafe practices which could result in severe personal injury, death or substantial
property damage.
CAUTION = Hazards or unsafe practices which could result in minor personal injury or product or property
damage.
NOTICE = Important installation, operation or maintenance information.
2

ROUTINE LUBRICATION REQUIREMENTS
Lack of or an excessive amount of lubrication will affect the perfor-
mance and life of this motor. Use only recommended lubricants at
below time intervals:
EVERY 8 HOURS OF MOTOR OPERATION - Fill lubricator res-
ervoir 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.
EVERY 160 HOURS OF MOTOR OPERATION - Lubricate gear-
ing. Pack bearings, coat shafts and lubricate gears with NLGI #l
“EP” grease (33153). Gearing should contain approximately 1/8
oz. (3.5 g) of grease.
AIR SUPPLY REQUIREMENTS
For maximum operating efficiency, the following air supply specifi-
cations should be maintained to this air motor:
l AIR PRESSURE - 90 p.s.i.g. (6.2 bar)
l AIR FILTRATION - 50 micron
l LUBRICATED AIR SUPPLY
l HOSE SIZE - 5/16” (8 mm) I.D.
An AR08 model C28231-810 air line FILTEWREGULATOR/LU-
BRICATOR (F.R.L.) is recommended to maintain the above air
supply specifications.
RECOMMENDED LUBRICANTS
After disassembly is complete, all parts, except sealed or shielded
bearings, should be washed with solvent. To relubricate parts, or
for routine lubrication, use the following recommended lubricants:
w
Where Used
PRO Part #
Pescription
Air Motor 29665 1 qt Spindle Oil
“0” Rings & Lip Seals 36460 4 oz. Stringy Lubricant
Gears and Bearings 33153 5 lb. “El”‘- NLGI#l Grease
INSPECTION,MAINTENANCEAND INSTALLATION
Disconnect air supply from the motor or shut off air supply and ex-
haust (drain) line of compressed air before performing mainte-
nance or service to the motor.
It is important that the motors be serviced and inspected at regular
intervals for maintaining safe, trouble-free operation of the motor.
Be sure the motor is receiving adequate lubrication, as failure to
lubricate can create hazardous operating conditions resulting
from excessive wear.
Be sure that the air supply lines and connectors are of proper size
to provide a sufficient quantity of air to the motor.
Maintenance and repair shall be performed by authorized,
trained, competent personnel. Hose and fittings shall be replaced
if unsuitable for safe operation. Responsibility should be assigned
to ensure that guards or other safety devices are installed and be-
ing used properly on certain motors. Maintenance and repair re-
cords should be maintained on all motors. Frequency of repair
and the nature of the repairs can reveal unsafe application.
Scheduled maintenance by competent authorized personnel
should detect ant mistreatment or abuse of the motor and worn
parts. Corrective action should be taken before returning the mo-
tor for use.
Disassembly should be done on a clean work bench with a clean
cloth spread to prevent the loss of small parts. After disassembly
is completed, all parts should be thoroughly washed in a clean sol-
vent, blown dry with air and inspected for wear levels, abuse and
contamination. Double sealed or shielded bearings should never
be placed in solvent unless a good method of lubricating the
bearing is available. Open bearings may be washed but should
not be allowed to spin while being blown dry.
Upon reassembling, lubricate parts where required. Use 33153
grease, or equivalent, in bearings. Use 36460 lubricant for “0”
ring assembly. When assembling “0” rings or parts adjacent “0”
rings, care must be exercised to prevent damage to the rubber
sealing surfaces. A small amount of grease will usually hold steel
balls and other small parts in place while assembling.
When replacement parts are necessary, consult drawing contain-
ing the part for identification.
Always use clean, dry air. Dust, corrosive fumes and/or excessive
moisture can damage the motor. An air line filter can greatly in-
crease the life of an air tool. The filter removes rust, scale, mois-
ture and other debris from the air lines. Low air pressure (less than
90 p.s.i.g.) reduces the speed of the air motor. High air pressure
(more than 90 p.s.i.g.) raises performance beyond the rated ca-
pacity of the motor and could cause injury. Shown below is a typi-
cal piping arrangement.
MAIN LtNES 3 TIMES
AIR MOTOR INLET SIZE
SYSTEM
AIR
MOTOR
LUBRICATOR
REGULATOR
BRANCH LINE 2 TIM
AIR MOTOR INLET S
DRAIN REGULARLY
3

20
NOTCH THIS END
38 37 36 35 33 34 33 32 31 29 28 27 \
NOT SHOWN
48176-1 WARNING LABEL
:
2
6
7
8
9
10
11
12
13
14
15
16
17
18
20
21
4
PART NUMBER FOR ORDERING #
Screen .............................
Inlet Adapter ........................
Washer .............................
Diffuser .............................
Muffler Housing ......................
Filler (2 req’d) .......................
Spring ..............................
Valve Rod Assembly .................
Housing Assembly ...................
Roll Pin .............................
Lever ..............................
Rott Pin .............................
Spring ..............................
Arm.. ..............................
Spring ..............................
Throttle Pin .........................
Bearing .............................
Rear End Plate ......................
Blade (5 req’d) ......................
Rotor ...............................
33911
46776
47586
47605
46752
46452
41654
46354
47460
Y17a-45
47473
Yl7845
46291-1
47474
46374
46296-2
47724
46312-l
46413
46470
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
PART NUMBER FOR ORDERING
Cylinder ............................
Front End Plate ......................
Bearing .............................
Locating Pin. ........................
Spacer .............................
Gear (3 req’d) .......................
Needle Bearing (3 req’d) ..............
Spindle Assembly ....................
“O”Ring ............................
RingGear ..........................
Spacer .............................
Bearing (2 req’d) .....................
Spacer .............................
Wave Washer .......................
Nut ................................
Adapter ............................
LockNut ............................
Lever Assembly (includes items 11 thru 14)
Motor Assembly (includes items 17 thru 24)
48201-I
47722
Y65-13
47723-2
46412
46899
42315
47759
Y325-214
47470
46496
Y65-13
46706
47682
42047
47471
47472
47475
48227-l

DISASSEMBLY/ASSEMBLY INSTRUCTIONS
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.
Use correct tools and fixtures when servicing this tool.
Don’t damage “0” rings when servicing this motor.
Use only genuine AR0 replacement parts for this motor.
When ordering, specify part number, description, model num-
ber and serial number.
GEARING DISASSEMBLY
Remove nut (36) from spindle.
Unthread and remove ring gear (31) and components from
motor.
Remove spindle assembly (29).
Do not disassemble further unless damage is evident.
Heat adapter (37) lightly and remove.
To remove bearings and spacers from ring gear, press on
spacer (32) from inside splined end of ring gear.
GEARING ASSEMBLY
Assemble spacer (32) and one bearing (33) to ring gear (31).
NOTE: Press on outer race of bearing.
Coat shafts of spindle (29) with AR0 33153 grease and as-
semble gears (27), containing needle bearings (28) to shafts.
Lubricate gears liberally with AR0 33153 grease (approxi-
mately l/8 oz.).
Assemble spindle to ring gear, aligning gear teeth with splines
of ring gear.
Assemble spacer (34) and bearing (33) to ring gear. NOTE:
Press on outer race of bearing.
Assemble wave washer (35) to ring gear.
Assemble nut (36) to spindle, securing components.
Apply a good grade thread adhesive (such as Loctite 271) to
internal threads of adapter (37) and assemble to ring gear.
Assemble spacer (26) to ring gear and assemble ring gear to
motor.
MOTOR DISASSEMBLY
Remove gearing from motor.
Remove spacer (26) and “0” ring (30).
Tap front edge of housing to remove motor assembly (40). Lo-
cating pin (25) should also come out.
Grasp cylinder in one hand and tap splined end of rotor with a
soft face hammer; motor will come apart.
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-
-
-
-
-
-
-
-
-
-
-
Remove end plate (18) and bearing (17) from rotor.
MOTOR ASSEMBLY
Pack bearing (17) with AR0 33153 grease and assemble to
end plate (18), pressing on outer race of bearing.
Assemble end plate (18) to rotor, pressing on inner race of
bearing.
Coat five rotor blades (20) with AR0 29665 spindle oil and as-
semble to rotor slots - straight side out.
Coat i.d. of cylinder (22) with AR0 29665 spindle oil and as-
semble over rotor. NOTE: Air inlet slots in end of cylinder must
be aligned with two air inlet holes in end plate (18).
Assemble bearing (24) to end plate (23), pressing on outer
race of bearing.
Assemble end plate (23) to rotor, pressing on inner race of
bearing. Be sure rotor turns without binding.
Insert locating pin (25) into .096” diameter blind hole at bottom
of motor cavity in housing.
Align notches of end plates and cylinder and install motor into
housing, aligning notches with locating pin (25).
Lubricate and assemble O-ring (30) to End Plate (23).
Assemble spacer (26) and gearing to motor.
THROTTLE DISASSEMBLY
Clamp air inlet adapter (2) in a smooth face vise.
Unthread housing (9) with a strap type wrench.
Remove washer (3), diffuser (4) muffler housing (5) two fillers
(6), spring (7) and valve rod (8). CAUTION: Do not remove or
adjust rubber portion of valve rod (8), as it is preset at the facto-
ry. However, if air leakage occurs due to wear, unscrew rubber
portion of valve rod NOT more than one complete turn (coun-
terclockwise).
Remove throttle pin (16) and spring (15).
Remove screen (1) from inlet adapter.
THROTTLE ASSEMBLY
Install spring (15) and throttle pin (16) into housing, aligning
slot in throttle pin with air inlet holes in housing.
Install valve rod assembly (8) into housing. NOTE: Throttle pin
(16) should not pull out when throttle rod (8) is seated properly.
Install two fillers (6) to muffler housing (5).
Install muffler housing (5) to housing, aligning lever (11) with
throttle pin (16).
Assemble spring (7) into housing.
Assemble diffuser (4) and washer (3) to housing, securing
with inlet adapter (2).
Clean and replace screen (1) in inlet adapter.
5