Toro Z Master 500 Series, Service Manual, Page: 163 / 168

7-26 Z Master 500 Gas Series Service Manual
7
MOWER DECKS/PTO
4. Check the belt tension. The spring loaded idler
center bolt needs to be near the top alignment hole
in left support plate (light contact with the rubber
stop) (Fig. 443).
Fig 443 fig. 72 m-4417
5. If adjustment is required, loosen the mower idler
plate and adjust it (Fig. 440).
6. Insert a ratchet or breaker bar into the square hole in
the mower idler plate to adjust the tension (Fig. 440).
7. To increase belt tension, rotate the mower idler plate
until resistance is felt and rotation stops. Do not go
past when it stops (Fig. 440).
8. Tighten the idler plate bolts (Fig. 440).
1. Center bolt 3. Left support plate
2. Alignment hole 4. Spring loaded idler
Fig 444 fig. 74 m-6825
9. Check the distance from the rubber stop and the arm
of the spring loaded idler pulley when the idler plate
is tightened. Light contact should be made between
the idler arm and the rubber stop (Fig. 444).
1. Spring loaded idler 4. Idler pulley arm
pulley 5. Belt
2. Top alignment hole 6. Rubber bumper
3. 0 to 1/4 in. gap (0 to 6mm)