Henry Tools 4401 RA Operating instructions

Updated 1/30/2004
74
13.Removescrew(591028).Removesnapring(404-8) .Supportbearing
(404-7)andpressspindlethroughwith1/4"punch.Thiswillremovespacer
(404-12),gear(404-10)andbearing(404-7).15.Removekey(404-4).
ASSEMBLY
Supportfrontbearing(400-G-11)ondrillblock.Pressspindle(404-14)through
bearing until it bottoms on shoulder.
2.Slide front thrust(400-7)over the spindle and onto front bearing. Place
key(400-10)intokeywayinspindle.Sliderotordownovershaft.3.Grasprotor
invise snugly and replace pinion gear(404-10)andwrenchfirmly.4. Support
bearingandpiniongearindownwardposition.Placefiveblades(400-6)inslots.
Slipcylinder(400-2-G)over rotor.Installrearthrust(404-19)locatingcylinder
pin in small hole of rear thrust plate (404-19). 5. Place bearing (404-9) in rear
thrustandtapintoplacewithsuitablebearingdriver.Usingpliersplacesnap
ring(592016)inspindlegrooveof(404-19).[(May be a snap ring in (404-19)]
6.Supportbearing(404-7)oninnerrace.Pressspindle(404-5)throughbearing
untilitbottomsonshoulder.7.Installkey(404-4)andlineupwithkeywayofring
gear(404-10).Supportgearoninnerdiameterandpressspindlethrough.Slide
spacer(404-12) on spindle. Replace snap ring (404-8) on spindle groove. 8.
Supportthreadedendofspindleandpressonbearing(404-3).Tightenscrew
(591028)intoend of spindle. Press spindle assembly into cap(404-2) Grease
gear.9.Installspringwashers(404-6)intoanglehead(404-1).10.Installspindle
assemblyinto angleheadhousing,securein viseandtighten cap(404-2).
11.Re-Locateangle headinvise-sothatthemotorcan beinstalledvertically.
12.Replaceshim(404-20)exactlyasitwasoriginallyinstalled.13.Jigglegreased
pinion assembly into angle head while turning spindle(404-5)-so that gears
mesh. Tap lightly on rear of motor to insure that is fully seated. 14. Install
exhaustdeflector(410-G-17-S).PlaceO-ring(400-51)onmotorcase(402-132)
andscrew ontoanglehead. Thedeflectorshould be snug,butcan beturned.
Place a few drops of oil into motor inlet.
15.Tocheckthrottlevalve,unscrewplug(869311)andliftoutspringandvalve.
ReplaceO-ringifworn.
16.Replaceguardon tool.
17.CHECKRPMWITHTACHOMETER.TOOLMUSTRUNAT
OR BELOW SPEED THAT IS STAMPED ON TOOL.
MODELS
4401 RA
4401 RAC
4401 RAS
4401 RASC
4401 RAK
4401 RASK
SERVICE INSTRUCTIONS
This tool is designed to operate on 90 psig (6.2 bar)
maximum air pressure with 1/4" (8 mm) hose. Do not use
a grinder without recommended wheel guard. Do not
use any wheel for which the operating speed listed is
lower than the actual free speed of the Grinder.
SAFETY
1.Beforeoperationcheckspindle speedwithatachometer. Ifthe RPMexceedsthe
ratedspeed stamped on tool, servicingisrequired.2. Inspect grinding wheels for
bends,chips,nicks,cracksorseverewear.Ifthewheelhasanyofthese,orhasbeen
soakedinliquids do not use. On brushes check for loose wires that mayflyoffin
operation. 3. Start new grinding wheels under a steel bench. Run at full throttle for
oneminute.Defectivewheelsusuallycomeapartimmediately.Whenstartingacold
wheelapplytoworkslowly,allowwheeltowarmgradually.4.Model4401RAC
grinders equipped with collets are intended for mounted
wheels,points and carbide burrs. They are not guarded
for type 1 wheels. If you have a type 1 wheel
application,please purchase a guard (4504,4505,etc.) 5.The
Model4401RA Grinders are equipped withaguardfrom the manufacturer. Aguardis
notneededfor:a.) mounted wheels two inches (50 mm) or smaller; b.) grinders used
forinternalwork,whilewithin the work being ground. 6. At least one-half of the
mandrellength (i.e. mounted wheel, burr,etc.) must be inserted intothe collet.
Securecolletchucktightly.7.Safetyleversareavailablefromthe manufacturer.(402-
26).8. Before mountingorremoving a wheel,disconnectgrinder fromairsupply.
Thewheelshouldfirproperlyonarbor, do not use bushings or wheel flanges to
adaptawheelto anyarbor unlessrecommendedbythemanufacturer. (Wheel
flangesshouldbeatleast1/3 the diameter of the grinding wheel.) 9. Wear safety
goggles and other protective clothing. Continuous exposure to vibration may cause
injurytoyourhandsandarms.(Seeregulations.)10.Properlymaintainedairtoolsare
lesslikely to failorcause accidents. Iftoolproduces an unusualsoundor vibrations
repairimmediately.
DISASSEMBLY
PLEASE NOTE: The brass spacers that were installed by
the factory are necessary for this tool to operate effi-
ciently. When disassembling this tool examine how
spacers are arranged. They must be installed exactly the
same way. Failure to do this will cause improper gear
spacing, which causes pre-mature tool failure.
1.Disconnectair&removeallwheelsandaccessories.2.Secureangleheadinviseon
dead handle boss. Unscrew and remove case(402-132) Never squeeze
anglehead in vise. This will distort bearings and ruin gear alignment. 3.
Removedeflector(410-G-17-S).
4. Pull motor from right angle head. Be careful to note location of shims. 5. Remove
snapring(404-39),wafer(404-38),O-ring(594016),andsnapring(592016).(Someof
thesemaynot bepresent).
6.Installbrassoraluminum jawsinvise.GrasptheO.D.ofcylinder(400-2-G)andend
plate(404-19).Using a 3/16"punch,tap spindle outrearbearing(404-9)
7.Removecylinder, blades(400-6). 8.Withrotor (400-5) stillonspindle (404-14),
grasptherotorinvise snugly and remove pinion gear(404-10).
8.Removerotor(400-5) Remove key and front thrust plate(400-7). 9.Pressbearing
(400-G-11) off of spindle.
10.Secure angleheadin vise andunscrewcap (404-2). 11.Removefrom viseandtap
onspindlewithaplastichammerThespindleassemblyandspringwashers(404-6)
willslideout.

Updated 1/30/2004
75
Model 4401-RAK Model 4401-RASCK
with built in collet.
11000RPM
Standard
MODELS
4401 RA
4401 RAC
4401 RAS
4401 RASC
4401 RAK
4401 RASK