Pto Clutch Adjustment; Blade Brake Check - Ferris IS4500ZBL3561 Operator's Manual

Troubleshooting, Adjustment & Service
Blade Brake CheckMower blades and mower drive belt should come to acomplete stop within seven (7) seconds after electricPTO switch is turned off.1. With parking brake engaged, PTO disengaged andan operator in the seat, start the engine engine.2. Have an assistant observe the mower drive beltthrough the open end of the left-hand arbor cover.Engage the PTO and wait several seconds.Disengage the PTO and check the amount of time ittakes for the mower drive belt to stop.3. If the mower drive belt does not stop within seven (7)seconds, perform the PTO Clutch Adjustment. If thebelt still does not stop within seven (7) seconds, seeyour dealer. PTO CLUTCH ADJUSTMENTCheck the PTO clutch adjustment after the initial 25 hourbreak-in period and then after every 100 hours of opera-tion. Also perform the following procedure if the clutch isslipping or will not engage, or if a new clutch has beeninstalled.1. Remove key from ignition switch to prevent the possi-bility of accidental starting while the PTO is beingadjusted.2. See Figure 45. Note the position of the 3 adjustmentwindows (A) in the side of the brake plate and thenylock adjustment nuts (B).3. Insert a .016"-.018" (0,40 - 0,45 mm) feeler gauge(C) through each window, positioning the gaugebetween the rotor face and the armature face asshown in Figure 46.4. Alternately tighten the adjustment nuts (B, Figure 45)until the rotor face and armature face just contactsthe gauge.5. Check the windows for an equal amount of tensionwhen the gauge is inserted and removed, and makeany necessary adjustments by tightening or loosen-ing the adjustment nuts.NOTE: The actual air gap between the rotor and arma-ture may vary even after performing the adjustment pro-cedure. This is due to dimensional variations on compo-nent parts, and is an acceptable condition.6. Check the mower blade stopping time. The mowerblades and mower drive belt should come to a com-plete stop within seven (7) seconds after the electricPTO switch is turned off. Figure 46. Adjust PTO Clutc hA. A. Adjustment Window (Qty. 3, one shown)B. WindowB. Adjustment NutC. .016"-.018" (0,40 - 0,45 mm) Feeler Gauge Adjustment Nut
A
C
WARNING
To avoid serious injury, perform adjustments only
with engine stopped, key removed and tractor on
level ground.
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B