Belt Replacement - Toro Groundsmaster 580-D Service Manual

Belt Replacement

Front Cutting Unit (S/N below 220000000)
1. Position machine on level surface, lower cutting unit
to shop floor, engage parking brake, shut engine off and
remove key from ignition switch.
Note: Wing spindle drive belts must be removed before
removing center section belt.
2. Remove belt covers. Lift each wing to release idler
pulley tension and slip belt off pulleys (Fig. 20).
3. Loosen jam nuts securing tension arm until com-
pression spring on idler assembly is relaxed (Fig. 21).
4. Remove flange head screws securing gearbox
plate and separate plate and drive motor assembly from
the cutting unit (Fig. 20). Be careful not to bend, twist,
kink or damage flexible hydraulic lines.
5. Remove old belt. Position new belt in pulleys and
assemble gear box and plate assembly to cutting unit.
6. Adjust belt tension (See Belt Tension Adjustment in
the Adjustments section of this chapter).
7. Install wing drive belts. Lift wings to allow belts to slip
over outer drive spindle pulleys and install belt covers.
Front Cutting Unit (S/N 220000001 and above) (Fig.
21A)
1. Position machine on level surface, lower cutting unit
to shop floor, engage parking brake, stop engine and re-
move key from ignition switch.
Note: Wing spindle drive belts must be removed before
removing center section belt.
2. Remove belt covers. Lift each wing to release idler
pulley tension and slip belt off pulleys.
3. Loosen jam nut and relieve tension on springs with
tensioner bolt.
4. Loosen four (4) capscrews securing slide plate to
motor mount.
Note: Do not loosen motor mount adjusting screws dur-
ing belt replacement.
5. Remove four (4) capscrews securing motor mount
to cutting deck. Position motor mount to allow belt re-
moval taking care not to bend, twist, kink or damage flex-
ible hydraulic lines.
6. Replace belt(s) as required. Install belts on pulleys
as shown in Figure 21B.
7. Position motor mount onto deck while routing belt
around drive pulley. Be careful not to bend, twist, kink or
damage flexible hydraulic lines.
8. Secure motor mount to cutting deck with four (4)
capscrews.
Repairs
4
1. Tension Plate & Spring
2. Wing Unit Drive Belt
3. Gearbox Plate
1
1. Tension Arm
1
5
4
1. Slide Plate
2. Motor Mount
3. Drive Motor
4. Drive Pulley
Page 7 - - 12 Rev. E
5
2
1
Figure 20
4. Center Drive Belt
5. Lift Arm
2
2
Figure 21
2. Jam Nuts
6
5
8
Figure 21A
5. Mount Adjusting Screw
6. Tensioner Bolt
7. Center Deck Spindle
8. Height Gauge
Groundsmaster 580--D
3
5
2
7