PLACING TOOL IN SERVICE
4.
For 4C15 or 4S1,
inserttheClutchAdjustingKey
intotheholein theClutchAdjustingNut and,while
holdingtheNut againstrotation,rotatetheBit Holder
toadjustthetorqueoutput.
For 4C17,
inserttheClutchAdjustingKey intothe
holein theClutchAdjustingNutand,whileholding
theNutagainstrotationandpushingagainsttheBit
Holderto engagetheclutchjaws,rotatetheBit
Holdertoadjustthetorqueoutput.
5. RotatingtheBit Holderclockwiseincreasesthe
compressionontheClutchSpring(112,209or261)
andraisesthetorqueatwhichtheclutchwill ratchet.
The most satisfactory adjustment is usually
obtained by useof the tool on the actual
application, and increasing or decreasingthe
delivered torque until the desired setting is
reached.In any event, it is recommendedthat the
final adjustment be made by gradual progression.
Theseclutches, when equipped with a Heavy
Spring, can he setbeyond the torque capacity of
the tool, in which casethe tool will stall before the
clutch ratchets. Do not adjust the clutch beyond
the torque capacity of the tool.
- CHANGING THE CLUTCH SPRING -
AdditionalClutchSpringsareavailablefor theseclutches
whichallowthetoolstobeusedwhenthedesiredtorque
doesnotfall within thetorquerangeof thefurnished
Spring.TochangeaClutchSpring(112,209or 261)
proceedasfollows:
1. WithdrawtheassembledclutchfromtheClutch
Housing(101,201or 250)afterperformingsteps1
through6asdescribedin thesection
Clutch
Lubrication.
2. To changethe Clutch Spring in the 4C15 Clutch,
proceedasfollows:
a. Graspthesplineof theClutchShaftSupport
(120)in leather-coveredorcopper-coveredvise
jawswith theBit Holder(106)upward.
b. Usingsnapring piers,removetheBit Holder
stop(115).
c. Usingawrenchandkeepingpressureagainstthe
SpringSeat(110)topreventtheClutchBalls
(108)fromfalling outof position,unscrewand
removetheClutchAdjustingNut (113).
This is a left-hand thread; turn clockwise to
remove.
d. Lift off theAdjustingNutLock (114)andthe
ClutchSpring.
e. InstallthenewClutchSpringandreplacethe
AdjustingNutLock.
f. ThreadtheClutchAdjustingNut ontotheBit
HolderandreplacetheBit HolderStop.
g. Removetheassembledclutchfromthevise.
3. To changethe Clutch Spring in the 4C17
Clutch, proceedasfollows:
a.
b.
C.
d.
e.
f.
CarefullygrasptheFrontClutchJaw(204)in
leather-coveredorcopper-coveredvisejaws
with theClutchAdjustingNut (214)upward.
Usingawrenchontheflatsof theClutch
AdjustingNut (214),loosenandremovetheNut.
Withtheassemblyin theviseandwhile applying
slightdownwardpressureto theClutchBall Seat
(208),removetheAdjustingNut Lock (213),
SpringSeatBearing(212),ClutchSpringSeat
(211)andtheClutchSpringfromtheClutch
Driver(203).
ThoroughlygreasetheBearingandAdjustingNut
Lock,andin theordernamed,slidethefollowing
overtheClutchDriver:thenewClutchSpring,
theClutchSpringSeat,theSpringSeatBearing
andtheAdjustingNutLock,indentedside
trailing.
StarttheClutchAdjustingNut,detentsidefirst,
ontotheClutchDriverandrun it fingertight
againstthecompressionof theSpring.Witha
wrench,tightentheNutanadditionaloneortwo
turns.
Removetheassembledclutchfromthevise.
4. To changethe Clutch Spring in the 4Sl Clutch,
proceedasfollows:
a Graspa l/4” AllenWrenchin visejaws with a
sectionof thehexpointingupward.Positionthe
Bit Holder(270)ontheAllen Wrenchsothatthe
splinedendof theClutchDriver (253)isupward
b. RemovetheClutchReturnSpring(254)and
ReturnSpringCollar(255)from theClutch
Driver.
c. Usingsnapringpliers,removetheSpringSeat
Stop(260)fromthethreadedsectionof the
ClutchDriver.
d. Usingawrench,unscrewandremovetheClutch
AdjustingNut (256).
