AIR N ARC
®
300 SERIES ALL-IN-ONE POWER SYSTEM
®
SECTION 6: MAINTENANCE
090010-OP_r0
PAGE - 89
plate to rotate/slide along the grooves in the
plate while still in position (
DO NOT
remove).
3. Use a 1/2” drive torque wrench applied to the
square tensioning hole [
D
] to manually rotate
the plate/idler about the loosened, but
anchored, mounting bolt. Apply torque of 51
in-lbs as per
Table 6B: Measuring Belt
Deflection
for the proper tension
measurement.
4. Once a position is achieved that accounts for
a satisfactory tension in the belt, torque the
four (4) tensioner plate bolts [
A
] to 12 ft-lbs
(16.3 Nm) to secure the tensioner into
position.
KEY
DESCRIPTION
KEY
DESCRIPTION
A
TENSIONER PLATE MOUNTING AND
ADJUSTMENT BOLTS
E
Loosen bolts to allow tensioner plate to pivot
manually to achieve new belt-tensioned posi-
tion.
B
IDLER
F
Pivot plate by applying torque wrench to ten-
sioning hole.
C
TENSIONER PLATE
G
Belt tension adjustment should be verified
using a tension tester.
D
TENSIONING HOLE
Figure 6-16: Compressor Serpentine Belt Re-tensioning
A
G
B
C
D
E
F
NOTE
If new belts are installed, recheck the
tension after 10-20 hours of operation,
and adjust if necessary.
IMPORTANT
Excessive loosening of mounting bolts
[A] to free the tensioner plate will cause
oil to leak.
Compressor seal may leak oil during the
adjustment of the tensioner plate. Check
compressor oil level after the adjustment
has been made and the bolts have been
re-tightened.
