MMD Equipment 400S-6B1 - Manual (Page 25)

4. Operation
4-6
4.3.7 Check V-Belt Tension
Too tight belt tension could damage shaft and shorten bearing life. Too loose belt tension may result
in damaging belt earlier and machine components due to overheat.
Follow the procedure below to adjust tension of fan belt
and V-belt for alternator.
(Procedure)
① Adjust the tension by gradually loosening the
fastening bolt of the alternator.
② Visually check if there are any cracks or tears in the
belt.
③ Loosen the fastening bolt of the alternator until the
play of the belt reaches 0.3 to 0.5in [ 22 lbf (98N) ]
when pushed by fingers, and adjust it.
④ Be careful not to leave any grease or LLC on a belt
while changing it. If any such material is left, wipe it
off completely.
4.3.8 Check Wiring of Each Part
Check each wiring for any loose connection, damage to insulating sheathed portion, disconnection,
and short-circuit.
4.3.9 Check Piping of Each Part
Check each piping for any loose connection and also check each hose and pipe for any tear and
leaks.
A010181
Depress the middle of
the belt with a finger.
Then check the
deflection of the
belt and make
sure that it shall
be 0.3 to 0.5 in .