Belt Maintenance; Servicing The Alternator Belt; Servicing The Compressor Belt; Replacing The Blade Drive Belts - Toro 31598 Operator's Manual

Belt Maintenance

Servicing the Alternator Belt

Service Interval: After the first 10 hours—Check the
alternator belt tension.
Every 1,000 hours—Check the
alternator belt tension.
Refer to the Engine Operator's Manual, included with
the machine, for the servicing procedure.

Servicing the Compressor Belt

Service Interval: After the first 10 hours—Check the
compressor belt tension.
Every 1,000 hours—Check the
compressor belt tension.
Model 31599 only
1. Loosen the compressor pivot bolt and adjusting bolt
(Figure 79).
2. Insert a torque wrench into the square hole in the
compressor bracket (Figure 79).
Figure 79
1. Compressor belt
2. Mounting bolt
3. Rotate the wrench until a torque of 27–33 ft-lb
(37–45 N∙m) is attained.
4. Tighten the mounting bolts.
3. Square hole
4. Pivot bolt
Replacing the Blade Drive
Belts
Service Interval: Every 50 hours—Inspect the blade
drive belts.
Every 1,000 hours—Replace the
drive blade belts
The blade drive belt, tensioned by the spring loaded
idler pulley, is very durable. However, after many hours
of use, the belt will show signs of wear. Signs of a worn
belt are: squealing when belt is rotating, blades slipping
when cutting grass, frayed edges, burn marks and cracks.
Replace the belt if any of these conditions are evident.

Front Cutting Unit

1. Lower the cutting unit to the shop floor. Remove
the belt covers from the top of the cutting unit and
set the covers aside.
2. On the front deck, loosen the jam nuts on the idler
pulley stop screw and thread the stop screw in to
the bracket (Figure 80).
3. Using a ratchet wrench or similar tool, move the idler
pulley (Figure 80) away from the drive belt to release
the belt tension and allow the belt to be slipped off
the deck pulleys.
1. Idler stop screw
2. Idler pulley
56
Figure 80
3. .10 to .16 inch