Toro 74212 - Replacing the PTO Drive Belt

Maintenance
62
Replacing the PT O Drive Belt
Squealing when the belt is rotating, blades slipping
when cutting grass, frayed belt edges, burn marks and
cracks are signs of a worn drive belt. Replace the
PTO drive belt if any of these conditions are evident.
1. Stop the engine, set the parking brake, remove
the key and disconnect the spark plug wire(s)
from the spark plug(s).
2. Remove the clutch retaining strap from machine
frame and unplug clutch terminal from wire
harness (Fig. 52).
3. Remove PTO drive belt from rear idler arm and
front idler pulley assembly. Remove the PTO
drive belt (Fig. 52).
4. Place new drive belt over clutch, around rear
idler pulley, installed into rear idler arm
assembly, installed into front idler pulley
assembly and onto top center pulley (Fig. 52).
IMPORTANT: Check the amount of twist in
belt between pulleys. Make sure it is only
what is specified in figure 52.
5. Install clutch retaining strap and plug clutch
terminal into main wire harness (Fig. 52).
1
4
m–4451
M-4373
3
2
5
7
6
6
Figure 52
1. Clutch
2. Clutch
retaining strap
3. clutch T erminal
4. PT
O belt
5. Machine Frame
6. 1/4’ Belt T wist
7.
1/8” Belt T wist
6. Check belt tension. The center bolt of spring
loaded idler must be between the two alignment
holes in left support plate (Fig NO TAG).
Note: Check position of center bolt in Low
Height of Cut. The center bolt must be
at or below the top alignment hole.
Check position of center bolt in a High
Height of Cut. The center bolt must be
at or above the lower adjustment hole
(Fig. 53).
1
2
M-4417
Figure 53
1. Center bolt, spring loaded
idler
2. Alignment hole
7. If adjustment is required, loosen the fixed idler
on right support plate and move up or down in
adjustment slot (Fig. 54). To relieve belt tension
lift up on spring loaded idler.
m–3746
12
Figure 54
1. Fixed Idler 2. Adjustment slot