Toro 30934 - Adjusting the Mower Belt Tension

Figure51
48-inchmowerdeck
1.13mm(1/2inch)deection
here
4.Locknut
2.Assistarm5.Turnbuckle
3.Frontstop
13.Checkthebeltguideundertheengineframeforthe
properadjustment.
Note:Thedistancebetweenthebeltguideandthe
mowerbeltshouldbe32mm(1-1/4inch)whenyou
engagethemowerbelt.Adjustthemowerbeltas
necessary.Thedisengagedbeltshouldnotdragorfall
offthepulleywhentheguidesareproperlyadjusted.
AdjustingtheMowerBelt
Tension
AdjustingtheTensionfor36-inch
MowerDecks
ServiceInterval:Aftertherst8hours—Checkthemower
belttension.
Aftertherst25hours—Checkthemowerbelt
tension.
Every50hours—Checkthemowerbelttension.
Important:Thebrakeneedstobeadjustedwhenthe
belttensionorthebrakelinkageisadjusted.
Important:Thebeltmustbetightenoughtonotslip
duringheavyloadswhilecuttinggrass.Over-tensioning
thebeltwillreducethespindlebearinglife,thebeltlife,
andtheidlerpulleylife.
Thebeltmustbetightenoughsothatitdoesnotslipduring
heavyloadswhilecuttinggrass,andover-tensioningwill
reducebeltandspindlebearinglife.
1.Disengagetheblade-control(PTO)leverandsetthe
parkingbrakes.
2.Stoptheengineandwaitforallmovingpartstostop
beforeleavingtheoperatingposition.
3.Loosenthelocknutontheturnbuckle(
Figure52).
4.Rotatetheturnbuckletowardtherearofthemowerto
increasethetensiononthebelt.Rotatetheturnbuckle
towardthefrontofthemowertodecreasethetension
onthebelt(Figure52).
Note:Theeyeboltthreadsonbothendsofthe
turnbuckleshouldbeengagedaminimumof8mm
(5/16inch).
5.Engagetheblade-controllever(PTO)andcheckthe
belttension.Adjustthetensionuntilitiscorrect.
Note:Thepropermowerbelttensionis44to67N-m
(10to15ft-lb)withthebeltdeected13mm(1/2inch)
halfwaybetweenthepulleys(Figure52).
Figure52
36-inchmowerdeck
1.Mowerbeltwith13mm
(1/2inch)deection
2.Idlerpulley
6.Tightenthelocknutontheturnbuckle.
7.Checkthebladebrakeadjustment;refertoAdjusting
theBladeBrake.
AdjustingtheTensionfor48-inch
MowerDecks
Important:Thebeltmustbetightenoughtonotslip
duringheavyloadswhilecuttinggrass.Over-tensioning
thebeltwillreducethespindlebearinglife,thebeltlife
andtheidlerpulleylife.
Important:Thebrakeneedstobeadjustedwhenthe
belttensionorthebrakelinkageisadjusted.
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