Belt Maintenance; Servicing The Engine Belts - Toro 03170 Operator's Manual

Belt Maintenance

Servicing the Engine Belts

Service Interval: After the first 10 hours—Check the
condition and tension of all belts.
Every 100 hours—Check the
condition and tension of all belts.
Tensioning the Alternator/Fan Belt
1. Open the hood.
2. Check the tension by depressing the alternator/fan
belt midway between the alternator and crankshaft
pulleys with 22 lb (30 N-m) of force (Figure 69).
Note: The belt should deflect 7/16 inch (11 mm).
Figure 69
1. Alternator/fan belt
3. If the deflection is incorrect, complete the following
procedure to tension the belt:
A. Loosen the bolt that secures the brace to the
engine and the bolt that secures the alternator to
the brace.
B. Insert a pry bar between the alternator and the
engine and pry out on the alternator.
C. When you achieve the proper belt tension,
tighten the alternator and brace bolts to secure
the adjustment.
Replacing the Hydrostat Drive Belt
1. Insert a nut driver or small piece of tubing onto the
end of the belt tensioning spring.
WARNING
Use caution when de-tensioning the spring, as it
is under a heavy load.
2. Push down and forward on the spring end (Figure 70)
to unhook it from the bracket and release tension
on the spring.
1. Hydrostat drive belt
3. Replace the belt.
4. Reverse the procedure to tension the spring.
51
Figure 70
2. Spring end