Komatsu WA800-1 Operation & Maintenance Manual page 87

EVERY 250
HOURS SERVICE
d. ALTERNATOR BELT
1. The belt tension should normally
deflect by about 9 mm when
pressed with the finger at a point
midway between the alternator
pulley and the drive pulley
(approx. 6 kg).
A Alternator pulley
r
\ 1
9mm
,
%T
w
Drive shaft pulley
2. To adjust the belt tension, loosen
3.
*
bolt (I
1
and nut (2) and shift alter-
nator (3) slightly.
After adjustment, tighten bolt (I
1
and nut (2) securely.
After operating the machine for
one hour with a newly exchanged
V-belt, test and adjust the V-belt
again.
When adjusting the V-belt, do
not attempt to push alternator
(3) directly with a bar or the like,
but use a wood pad to prevent
damage to the core.
Check each pulley for damage,
and V-grooves and V-belt for
wear. Particularly, check whether
V-belt is in contact with bottom
of V-groove through wear.
Replace belt if it has stretched,
leaving no allowance for ad-
justment, or if there is a cut or
crack on belt.
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w-02074