MAINTENANCE
3-36 WB140-2N, WB150-2N
MAINTENANCE EVERY 250 HOURS OF OPERATION
Perform the following operations together with those to be initiated every 50 HOURS:
ADJUSTING FAN BELT TENSION
The fan belt can be reached after opening the engine hood (See
“ENGINE HOOD” on page 2-25).
The test is manual: press belt (1) with a thumb on the indicated point
with a force equal to approximately. 98 N (22 lb.); resulting deflection
must be approximately 10 - 15 mm (0.4 - 0.6 in). If the deflection
exceeds this value, loosen screw (2) that fastens alternator (3) and, with
a lever inserted between the engine block and casing, make the alterna-
tor slide. Lock screw (2) and check again.
• Use a 12 mm wrench.
A Fan pulley
B Alternator pulley
★ If the belt is worn, replace it and check tension again after a few
hours of operation.
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