ARO 7673–A User manual

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: [phone].
E2000 INGERSOLL–RAND COMPANY DPRINTED IN U.S.A.
Ingersoll–Rand Company
ARO Tool Products
1725 U.S. No. 1 North DP.O. Box 8000 DSouthern Pines, NC 28388–8000
OPERATOR’S MANUAL Released:
Revised: 1-19-00
Form: 1572-2
INCLUDING:ĂOP RATION,ĂINSTALLATIONĂ&ĂMAINT NANC
IMPORTANT: READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
OPERATING OR SERVICING THIS EQUIPMENT.
Model 7673–A
‘‘2200” SERIES RIGHT–ANGLE DRILL
)
OPERATING AND SAFETY PRECAUTIONS
Pneumatic tools should always be installed and used in accor-
dance with A.N.S.I. B186.1 ‘‘Safety Code For Portable Air Tools.”
CAUTION:
•Keep hands and clothing away from rotating end of tool.
•Wear suitable eye protection while operating tool.
•Use tool only for purposes for which it was intended.
•SHUT OFF and DISCONNECT AIR SUPPLY from tool BE-
FORE performing maintenance, service or disassembly of
tool.
WARNING: Repeated prolonged operator exposure to vibrations
which may be generated in the use of certain hand–held tools
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 damage as well as tissue necrosis. Repetitive users of
hand–held tools who experience vibrations should closely moni-
tor duration of use and their physical condition.
ROUTINE LUBRICATION REQUIREMENTS
Lack of or an excessive amount of lubrication will affect the perfor-
mance and life of this tool. Use only recommended lubricants at
below time intervals:
EVERY 8 HOURS OF TOOL OPERATION – Fill lubricator reser-
voir 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 40 HOURS OF TOOL OPERATION – Flush tool with a
solution of three parts cleaning solvent and one part light oil. After
flushing, apply a small amount of spindle oil in air inlet and run free
for one minute to insure proper lubrication.
EVERY 160 HOURS OF TOOL OPERATION – Lubricate gear-
ing. Pack bearings, coat shafts and lubricate gears with NLGI #1
‘‘EP” grease (33153). Gearing should contain approximately 1/4
oz. (7 g) of grease. Inject 2 or 3 strokes of grease thru grease fitting
in right–angle housing. Right–angle assembly 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 tool:
•AIR PRESSURE – 90 PSIG (6 bar)
•AIR FILTRATION – 50 micron
•LUBRICATED AIR SUPPLY
•HOSE SIZE – 3/8” (10 mm) I.D.
An ARORmodel C28231–810 air line FILTER/REGULATOR/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:
Where Used ARO Part # Description
Air Motor 29665 1 qt. Spindle Oil
‘‘O” Rings & Lip Seals 36460 4 oz. Stringy Lubricant
Gears and Bearings 33153 5 lb. ``EP" - NLGI #1 Grease

2
DISASSEMBLY/ASSEMBLY INSTRUCTIONS
RIGHT–ANGLE SECTION
DISASSEMBLY
a. Remove lock screw (32788–ARO) and drive shaft (37487)
with bearing and gear attached.
b. To remove bearing (41093), remove nut (32798) and gear.
c. Loosen nut (32795) completely and remove drive shaft
(41543) with attached parts. To remove from shaft, remove nut
(32798).
ASSEMBLY
a. Assemble nut (32975), seal (32796), spacer (32797), bearing
(41093) and gear to shaft (41543) and secure with hex nut
(32798). Assemble into housing and secure to housing with
nut (32795).
b. Assemble bearing (41093) and gear to shaft (37487) and se-
cure with nut (32798). Assemble into housing and secure to
housing with lock screw (32788–ARO).
NOTE: Seal (32796) must be assembled to shaft with lip of seal
facing bearing. Bearings (41093) are shielded on one side. Bear-
ings must be assembled to shafts, shielded side first. Right–angle
assembly should contain 1/8 oz. of grease.
RIGHT–ANGLE ASSEMBLY 41544
(ATP–19)
GEARING SECTION
GEARING ASS’Y 37485
(7.43:1) (ATP–52)

3
3
DISASSEMBLY/ASSEMBLY INSTRUCTIONS
GEARING SECTION
DISASSEMBLY
a. Remove spindle, with attached parts, from ring gear and re-
move spacers (37127 and 37126).
b. Alternately tap ends of shafts (37124) to remove bearing
(33704) and spacer (37128).
c. Remove shafts (37124) to remove gears from spindle.
ASSEMBLY
a. Assemble gears to spindle and secure with shafts (37124).
b. Assemble spacers (37126 and 37128) and bearing (33704) to
spindle.
c. Assemble spacer (37127) to spindle and assemble into ring
gear.
NOTE: Gearing assembly should contain 1/4 oz. of grease.
MOTOR SECTION
✝INCLUDED WITH CYLINDER 36772
✱NOT INCLUDED WITH MOTOR ASSEMBLY
fTORQUE TO 9 –12 FT LBS.
jTORQUE TO 28 IN. LBS
nINCLUDES GREASE FITTING 35967 (NOT SHOWN)
✩FLUSH FACE –INSTALL WITH FLUSH
FACE TOWARDS END PLATE.
MOTOR ASSEMBLY 43139
(ATP–53)
j
f
✩
DISASSEMBLY
a. Remove motor assembly from housing. Using a spanner type
wrench, remove nut (33694) and fastener (33700). Grasp cyl-
inder in one hand and tap splined end of rotor with a soft face
hammer; motor will come apart.
ASSEMBLY
NOTE: Pack bearing with 33153 grease, or equivalent, and coat
i.d. of cylinder with spindle oil upon assembly.
a. Assemble bearings into end plates. NOTE: Assemble bearing
(33709) into end plate with the identification markings on the
bearing facing ‘‘out”. Assemble end plate (33710) to rotor and
secure with fastener (33700). NOTE: Torque to 28 in. lbs.
b. Assemble cylinder over rotor, aligning air inlet holes in cylin-
der, with air inlet slot of end plate and roll pin with hole in end
plate. Assemble blades to rotor. Assemble end plate (33712)
to rotor and cylinder, aligning hole in end plate with roll pin in
cylinder. Assemble nut (33694) to end plate, torquing to 9 –12
ft lbs.
c. Be sure rotor does not bind (if rotor binds, lightly tap splined
end of rotor with a soft face hammer) and assemble to tool.
ASSEMBLING MOTOR TO TOOL
a. Remove motor housing (37082) from head. Place head in a
suitable holding device with the ‘‘motor end”in an upright posi-
tion. Assemble motor assembly to head, aligning roll pin in
motor with hole provided in head (.125 diameter blind hole).
Slip motor housing over motor and secure to head. Assemble
spacers (33699 and 33711) and gearing to tool.

LEVER HEAD ASSEMBLY 37079
* PARTS NOT INCLUDED IN HEAD ASSEMBLY
(ATP–55)
126121–000 LUBRICATOR
ASSEMBLY (1/4”PORTS)
(ATP–54)
KEYED CHUCK 30016
KEY NO. 30016–K (NOT SHOWN)
4PN 4999–337
DISASSEMBLY/ASSEMBLY INSTRUCTIONS
HEAD SECTION
DISASSEMBLY
a. Remove nut (36776) and valve parts are free to be removed.
b. To remove lever, remove pin (36992)
ASSEMBLY
a. Assemble ‘‘O”ring (Y325–7) to valve and assemble into head.
b. Assemble spring (32858), regulator (36775) and seal (36781)
into head and secure with nut.
NOTE: Opening in wall of regulator must be aligned with air inlet
hole in head.