Komatsu PW130ES-6K Operation & Maintenance Manual page 214

MAINTENANCE.
ADJUSTING
With the automatic belt tensioner, no adjustment is required.
REPLACEMENT
To replace the drive belt, place a 3/8 in. drive rachet (2) in the 3/8
in. square drive hole in the belt tensioner. Push the rachet "UP" to
loosen the tensioner. Remove the old belt (1). Inspect belt ten-
sioner. The tensioner pulley should spin freely with no rough
spots detected under hand pressure. Install the new belt.
CHECK ALTERNATOR AND WATER PUMP BELT
TENSION, ADJUST CHECKING TENSION
The engine is equipped with an automatic belt tensioner that
maintains correct tension on the drive belt. To check belt tension
a "Gates" type gauge must be used because of the wide drive
belt. Proper tension should be 355 to 455 N.m gauge value.
If a "Gates" type gauge is not available, tension may be checked
by belt deflection. Press the belt with your finger at the longest
span and measure the deflection. Maximum deflection 9.5 to 12.7
mm.
ADJUSTMENT
With the automatic belt tensioner, no adjustment is required.
REPLACEMENT
To replace the drive belt, place a 3/8 in. drive rachet in the 3/8 in.
square drive hole in the belt tensioner. Push the rachet "UP" to
loosen the tensioner. Remove the old belt. Inspect belt tensioner.
The tensioner pulley should spin freely with no rough spots
detected under hand pressure. Install the new belt.
NOTE: The belt tensioner is spring loaded and must be pivoted
away from the belt. Pivoting in the wrong direction can
result in damage to the belt tensioner.
SERVICE PROCEDURE
213