Operation and maintenance manual

QSB4.5 and QSB6.7 Cooling Fan Belt Tensioner
Section 6 - Maintenance Procedures at 1000 Hours or 1 Year Page 6-1
Maintenance Procedures - Overview
General Information
All maintenance checks and inspections listed in previous
maintenance intervals must also be performed at this
time, in addition to those listed under this maintenance
interval.
Cooling Fan Belt Tensioner
Maintenance Check
With the engine stopped, check the tensioner arm, pulley,
and stops for cracks. If any cracks are found, the
tensioner must be replaced.
With the belt installed, verify that neither tensioner arm
stop is in contact with the spring case stop. If either of the
stops is touching:
• Verify the correct belt part number is installed.
• If the correct belt is installed, replace the belt. Refer to
Procedure 008-002 in Section A.
After replacing the belt, if the tensioner arm stops are still
in contact with the spring case stop, replace the tensioner.
With the belt removed, verify that the tensioner arm stop
is in contact with the spring case stop. If these two are not
touching, the tensioner must be replaced.
After replacing the belt, if the tensioner arm stop is still in
contact with the spring case stop, the tensioner MUST be
replaced.