Adjusting Cutting Unit Belt Tension; Replacing The Blade Drive Belts - Toro 30582 Groundsmaster 580-D Operator's Manual

ends higher than blade center, or with cutting edge
higher than the blade heel, is warped or bent and must
be replaced.
5. When assembling, make sure blade sail is facing up.
Torque the blade bolt to 140–165 ft.-lb.
Inspecting and Adjusting the
Cutting Unit Belt Tension
Important
After first ten hours of operation, check new
belts for proper tension; thereafter, check tension every 50
hours.
Front Cutting Unit
Note: Belts for wing unit spindles are tensioned by spring
loaded idlers and normally do not require tensioning.
1. Position machine on level surface, lower cutting unit to
shop floor, engage parking brake, stop the engine, and
remove the ignition key.
2. Remove deck covers.
3. Loosen jam nut and relieve tension on springs with
tensioner bolt (Fig. 66).
Figure 66
1. Jam nut
2. Tensioner bolt
4. Loosen (4) capscrews securing slide plate to motor
mount (Fig. 66).
4
1
2
3–1/6"– New belt
3–1/4"– Used belt
3
3. Slide plate
4. Tensioner bolt
52
5. Tighten tensioner bolt until springs are compressed to
dimension shown in figure 66.
6. Tighten jam nut securing adjustment (Fig. 66).
7. Tighten (4) capscrews securing slide plate to motor
mount (Fig. 66).
8. Replace deck covers.
Outboard Cutting Units
1. Remove deck covers. To check belt tension, apply 8 lb.
(35.5 N) force at mid-span of belt and check deflection.
There should be approximately 5/16 in. (7.9 mm)
deflection. If deflection is incorrect, proceed to step 2.
If deflection is correct, proceed to step 3.
2. To tension belts, loosen flange locknut at top of idler
pulley (Fig. 67). Slide pulley against belt until proper
tension is reached. Hold pulley in position and tighten
locknut.
2
Figure 67
1. Idler pulley flange locknut
3. Replace deck covers.
Replacing the Blade Drive
Belts
Position machine on level surface, lower cutting unit to
shop floor, engage parking brake, shut engine off and
remove key from ignition switch.
Front Cutting Unit
Note: To remove center section belt, wing spindle drive
belts must first be removed.
1. Remove deck covers. Lift each wing to release idler
pulley tension and slip belt off pulleys.
1
2. Drive belts