Toro 74312 - Aligning the Pump-Drive Pulley; Adjusting the PTO Brake Spring

3.Removethefuel-tankmountingnutsandswing
outthefueltank.
4.Verifythattheblowerisinstalledandtightly
secured.
5.Loosenthe4enginemountingbolts.
6.Unhookthepump-belttensionspring.
7.Loosenthe4jackshaftmountingbolts.
8.Measuringfromtheblowerpulleyasabaseline,
movetheengineandjackshaftuntiltherear
surfaceofall3pulleysarealignedwithin0.8to
1.6mm(1/32inchto1/16inch)(Figure56).
Note:Useastraightedgetoalignall3surfaces.
g006846
Figure56
1.Alignthe3pump-drive
pulleysurfacesshown
withthispatternwithin0.8
to1.6mm(1/32inchto
1/16inch).
2.Alignthe3PTO-drive
pulleysurfacesshown
withthispatternwithin0.8
to1.6mm(1/32inchto
1/16inch).
9.Tightenthe4enginemountingboltsand4
jackshaftmountingbolts.Checkthealignment
aftertightening.
10.Installthepump-belttensionspring.
11.Swingthefueltankinandinstallthetank
mountingnuts.
12.Alignthepump-drivepulley;Aligningthe
Pump-DrivePulley(page51).
AligningthePump-Drive
Pulley
Thepump-drive-pulleyalignmentisnecessaryforany
ofthefollowingconditions:
•Theenginemountingboltshavebeenloosenedor
theenginehasbeenmovedorreplaced.
•Thepumppulleyshavebeenloosened,moved,
orreplaced.
•ThePTOpulleyhasbeenaligned;refertoAligning
thePTO-DrivePulley(page50).
1.Shutoffthemachineandmovethespeed-control
levertotheNEUTRALposition.
2.DisengagethePTO,engagetheparkingbrake,
shutofftheengine,andwaitforallmovingparts
tostop.
3.Loosenthesetscrewsonbothpumppulleys.
4.Usingastraightedge,aligneachpumppulley
withtheenginepulleybyslidingitalongthe
pumpshaft(Figure56).
5.Tightenthepulleysetscrewsandcheckthe
alignment.
AdjustingthePTOBrake
Spring
AdjustthePTObrakespringonlyiftheblowerhas
beenremovedorreplacedorifthePTOdriveidler
armhasbeendisassembled.
1.Stopthemachineandmovethespeed-control
levertotheNEUTRALposition.
2.DisengagethePTO,engagetheparkingbrake,
shutofftheengine,andwaitforallmovingparts
tostop.
3.Locatethebrakespringandthreadthe2jam
nutsouttotheendofthebrake-springrod
(Figure57).
4.Tightenthejamnutstogetheratendofthe
brake-springrod.
g006848
Figure57
1.Tightenthejamnutshere.
2.PTObrake-springassembly
51