Toro 39988 Operator's Manual page 41

Note: The distance between the belt guide and
the mower belt should be 3/4 inch (19 mm) when
you engage the mower belt (Figure 50). Adjust the
mower belt as necessary. The disengaged belt should
not drag or fall off the pulley when the guides are
properly adjusted.
1. Belt guide
9. Check the blade brake adjustment; refer to Adjusting
the Blade Brake.
Adjusting the PTO Engagement
Linkage
The PTO engagement linkage adjustment is located
beneath the front left hand corner of the engine deck.
1. Disengage the blade control (PTO) lever and set the
parking brakes.
2. Stop the engine and wait for all moving parts to stop
before leaving the operating position.
3. Engage the blade control lever (PTO).
4. Adjust the linkage length to where the lower end
of the bellcrank just clears the axle support gusset
(Figure 51).
Figure 50
1. Bellcrank
2. Safety switch located
under engine deck
3. Bellcrank just clears the
gusset with the PTO
engageded
5. Make sure the assist arm is against the rear assist arm
stop on the deck (Figure 52).
6. Push the blade control lever (PTO) down to the
disengaged position.
7. The assist arm should contact the front assist arm
stop on the deck. If it does not contact, adjust the
bellcrank so it is closer to the gusset (Figure 52).
1. Assist arm
2. Front assist arm stop
8. To adjust the assist arm link, remove the hairpin
cotter pin from the assist arm (Figure 52).
9. Loosen the nut against the yoke (Figure 51).
41
Figure 51
4. Yoke
5. Nut
6. Assist arm link
Figure 52
3. Rear assist arm stop
4. Turnbuckle