External Engine Component Repair; External Engine Component Repair; Belt Replacement And Adjustment - Toro Workman 3000 Series Service Manual

External Engine Component Repair

Belt Replacement and Adjustment

Alternator Belt
1. Loosen bolt securing alternator brace to engine and
bolt securing alternator to brace (Fig. 36).
2. Remove two capscrews securing drive shaft coupler
to engine crankshaft pulley.
3. Move drive shaft out of the way so belt can be
removed and new one installed.
4. Install new belt.
5. Connect drive shaft coupler to engine crankshaft
pulley with two capscrews and washers.
6. To adjust belt tension, insert pry bar between alterna ­
tor and engine and carefully pry alternator out until
proper tension is achieved. To check tension, depress
belt midway between crankshaft and alternator pulleys
with 22 lbs. of force. A new belt should deflect 0.3 to 0.5
inch and a used belt 0.4 to 0.55 inch. Tighten alternator
and brace bolts to secure adjustment.
Fan Belt
1. Loosen locknut on idler pulley (Fig. 37).
2. Remove belt by carefully moving around fan blades.
3. Install new belt.
4. To adjust belt tension, loosen idler pulley mounting
nut and move pulley to increase tension. To check
tension depress belt midway between fan and drive
shaft pulleys with 22 lbs. of force. A new belt should
deflect 0.48 to 0.58 inch and a used belt 0.55 to
0.65 inch. Tighten nut to secure adjustment.
Liquid Cooled Diesel Engine
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1
Figure 36
1. Alternator belt
2. Alternator brace
3. Capscrews and washers
1
2
Figure 37
1. Fan belt
2. Idler pulley
Workman 3300-D/4300-D