Replacing The Deck Belt - Toro Groundsmaster 120 Operator's Manual

1
Figure 25
1. Right Center Deck Cover
3. Remove the plug on the side of the gearbox. The fluid
level must be up to the side hole in the gearbox
(Fig 26).
4. If fluid is needed, remove the top plug from the
gearbox. Add SAE E.P. 90 wt. gear oil into the top
hole in the gearbox. It is full when it runs out the side
hole.
5. Install the top and side plugs using pipe sealant
(Fig 26).
1
3
2
Figure 26
1. Top plug
2. Side plug
6. Install both center deck covers onto the deck with
fasteners (Fig. 25).

Replacing the Deck Belt

Squealing when the belt is rotating, blades slipping when
cutting grass, frayed belt edges, burn marks and cracks are
signs of a worn deck belt. Replace the deck belt if any of
these conditions are evident.
2
m–5662
2. Left Center Deck Cover
m–5661
3. Gearbox
17
1. Loosen the fasteners holding the left and right center
deck covers and remove both center deck covers
(Fig. 27).
2. Remove the flange screws holding the left and right
covers to the deck and remove both covers (Fig. 27).
2
1
Figure 27
1. Right Deck Cover
2. Right Center Deck Cover
3. Lift the idler pulley and remove the drive belt. Refer
to Replacing the Drive Belt on page 18.
4. Install the new deck belt around the three spindle
pulleys, gearbox output pulley and deck idler pulley
(Fig. 28).
5. Reconnect the deck idler arm spring (Fig. 28).
2
1
4 5
Figure 28
Top View
1. Deck Belt
2. Deck Idler Arm Spring
3. Deck Idler Pulley
3
4
m–5662
3. Left Center Deck Cover
4. Left Deck Cover
3
6 m–2563
4. Spindle Pulley (3)
5. Gearbox Output Pulley
6. Idler Arm