Maeda CC1908S-1, Operation Manual

Page: 264 / 326

6.17 PERIODIC MAINTENANCE M A E D A Crawler Crane
6-56 5/2020 CC1908S-1
IMPORTANT
When checking the fan belt tension, check
the following at the same time:
• Check the pulleys for damage, V groove
wear, and V belt wear. In particular, make
sure that the belt is not in contact with the
bottom of the V groove.
• If the belt has stretched leaving no margin
for adjustment, or if it is cut or cracked and
makes a slipping/squeaking sound, contact
us or our sales service agency for
replacement.
4.
If tension adjustment is necessary, proceed
to Step 5 of [Tension adjustment]. If the
tension is satisfactory, proceed to Step 9.
[Tension adjustment]
5.
Loosen the mounting bolts (6) on the
alternator (5).
6.
Loosen the alternator lock nut (7).
7.
Turn the adjuster bolt (8) on the alternator (5)
in the loosening direction to adjust the belt
tension so that it gives a deflection between 7
mm and 10 mm (approximately 98 N
ꞏ m [10
kgf ꞏ m]).

After replacing the belt, run the machine for at
least five minutes before readjusting.
8.
Tighten the mounting bolt (6) and lock nut (7).
Tightening torque
・ M8 bolt: 23.5 N ･ m [2.4 kgf ･ m]
・ M10 bolt: 48.0 N ･ m [4.9 kgf ･ m]
9.
Attach the fan guard (2).
10.
Close the machinery cover (1).
[4] A/C compressor belt tension
inspection/adjustment
[Tension check]
1.
Open the machinery cover (1).
2.
Remove the fan guard (2) and compressor
guard (3).
3.
Press down on the middle of the belt (A)
between the crank pulley (4) and the
compressor pulley (5) with your thumb
(approximately 17.7 N [1.8 kgf]) and confirm
that the deflection is the standard value of 4
mm.
4.
If tension adjustment is necessary, proceed
to Step 5 of [Tension adjustment]. If the
tension is satisfactory, proceed to Step 9
(4)
(5)
(A)