Inspecting And Adjusting Cutting Unit Belt Tension; Replacing The Blade Drive Belts - Toro 30581 Groundsmaster 580-D Operator's Manual

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. 63).
Figure 63
1. Jam nut
2. Tensioner bolt
4. Loosen (4) capscrews securing slide plate to motor
mount (Fig. 63).
5. Tighten tensioner bolt until springs are compressed to
dimension shown in figure 63.
6. Tighten jam nut securing adjustment (Fig. 63).
7. Tighten (4) capscrews securing slide plate to motor
mount (Fig. 63).
8. Replace deck covers.
4
1
2
2–13/16"– New belt
3–1/4"– Old belt
3
3. Slide plate
4. Tensioner bolt
49
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. 64). Slide pulley against belt until proper
tension is reached. Hold pulley in position and tighten
locknut.
2
Figure 64
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.
2. Loosen jam nut and relieve tension on springs with
tensioner bolt (Fig. 65).
3. Loosen (4) capscrews securing slide plate to motor
mount (Fig. 65).
4. Remove (4) capscrews securing motor mount to deck
(Fig. 65).
Note: Do not loosen adjusting screws.
1
2. Drive belts