Toro 74237 - Adjusting the Mower Belt; Tension

2. Stop the engine , remo v e the k ey , and w ait for
all mo ving par ts to stop before lea ving the
operating position.
3. R emo v e the belt co v ers .
4. Loosen the n ut securing the idler plate and
mo v e the idler plate to reliev e the belt tension
on the idler pulley ( Figure 47 ).
5. R emo v e the n ut, w asher and belt guide from
the rear leftside pulley .
6. R emo v e the mo w er belt from the belt guides
and remo v e the belt ( Figure 47 ).
7. Install the new mo w er belt around the mo w er
spindle pulleys , mo w er idler pulley , into the
belt guides , into rear idler ar m assembly , and
the clutc h ( Figure 47 ).
8. Install the belt guide with a w asher and n ut
onto the rear leftside pulley .
Note: Chec k the amount of twist in the belt
betw een the pulleys . Ensure it is only what is
specified in Figure 47 .
Figure 47
1. Clutch 6. Mower idler pulley
2. Mower belt 7. Belt guide installed
3. 1/4 trun belt twist
8. Nut
4. Belt guide 9. Washer
5. Mower spindle pulley 10. Rear left side pulley
9. Adjust the belt tension, refer to Adjusting the
Mo w er Belt T ension.
10. Install the belt co v ers and close the latc hes .
Adjusting the Mower Belt
Tension
1. Diseng ag e the PTO , mo v e the motion control
lev ers to the neutral loc k ed position, and set
the parking brak e .
2. Stop the engine , remo v e the k ey , and w ait for
all mo ving par ts to stop before lea ving the
operating position.
3. Raise the mo w er to the transpor t position.
Important: Check the amount of twist
in the belt betw een the pulleys. Mak e sur e
it is onl y what is specified in Figur e 47 .
Important: Check and mak e sur e the
belt is installed into both the fr ont and r ear
belt guides ( Figur e 48 ).
4. Chec k the belt tension. T he spring loaded idler
center bolt needs to be near the top alignment
hole in left suppor t plate ( Figure 48 ).
Figure 48
1. Center bolt 3. Left support plate
2. Alignment hole 4. Spring loaded idler
5. If adjustment is required, loosen the idler plate
to adjust it ( Figure 49 ).
6. Inser t a ratc het or break er bar into the square
hole in the idler plate to adjust the tension
( Figure 49 ).
7. T o increase belt tension, rotate the ratc het or
break er bar to mo v e the fix ed idler until y ou
feel increased resistance and the spring-loaded
idler pulley stops mo ving ( Figure 49 ).
Note: Do not increase the belt tension
bey ond the point where the fix ed idler ar m
stops .
8. W hile holding the belt tension, tighten the
idler plate bolts that secure the idler plate
( Figure 49 ).
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