Toro 74237 - Replacing the Pump Drive; Belt

Figure 49
1. Rachet with short extension
or breaker bar
2. Idler plate with Square hole
9. Chec k the distance from the r ubber stop and
the ar m of the spring loaded idler pulley when
the idler plate is tightened. It needs to be 0 to
1/4 inc h (0 to 6 mm) from the r ubber stop
( Figure 50 ).
Figure 50
1. Spring loaded idler pulley 4. Idler pulley arm
2. Top alignment hole 5. Belt
3. 0 to 1/4 inch gap (0 to 6
mm)
6. Rubber bumper
10. Adjust the belt tension and the idler plate , if
necessar y , and tighten all hardw are securely
( Figure 49 ).
11. If the idler plate contacts the end of the
adjustment slot and more belt tension is
required, a small c hang e to the right side fix ed
idler can create more belt tension adjustment
( Figure 51 ).
Figure 51
1. Fixed idler 2. Adjustment slot
Replacing the Pump Drive
Belt
Chec k pump dri v e belt for w ear after ev er y
50 hours of operation.
1. Pull the spring loaded idler do wn and remo v e
traction belt from the engine and h y dro pump
pulleys ( Figure 52 ). R emo v e belt betw een
pulleys .
Figure 52
2. Install new belt around engine and h y dro pump
pulleys ( Figure 52 ).
3. Pull spring loaded idler do wn and align belo w
traction belt. R elease the pressure on the
spring loaded idler ( Figure 52 ).
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