AIR N ARC
®
300 SERIES ALL-IN-ONE POWER SYSTEM
®
SECTION 6: MAINTENANCE
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PAGE - 101
2. Loosen, but do not remove, the three (3)
tensioner plate bolts [
D
] mounting the
tensioner plate/pump sheave [
A
] in place.
Loosen only enough to allow tensioner plate
to pivot along the grooves in the plate while
still remaining in position.
3. Use a 1/2” drive torque wrench applied to the
square tensioning hole [
E
] to manually rotate
the plate/pump sheave about the loosened,
but anchored, mounting bolt (bottom 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
three (3) tensioner plate bolts [
D
] to 12 ft-lbs
(16.3 Nm) to secure the tensioner into
position.
6.6.15.6 REPLACING THE ENGINE HYDRAULIC
PUMP DRIVE DRIVE BELT
The hydraulic pump can only be accessed when the
machine’s maintenace access panels are removed.
Follow the procedure in
Section 6.5, Maintenance
Access
. Once the panels are removed, Consult
Figure
6-23
, and the following procedure:
1. Make certain that the machine is off and the
ignition key removed.
2. Loosen, but do not remove, the three (3)
tensioner plate bolts [
D
] mounting the
tensioner plate/pump sheave [
A
] in place.
Loosen only enough to allow the tensioner
plate to pivot along the grooves in the plate
while still remaining in position.
3. Pivot the tensioner plate counterclockwise to
its maximum position. This will shorten the
distance between the engine sheave and the
drive sheave, and allow the loosened belt to
be removed.
4. Replace the worn drive belt with a new belt in
position on the engine and drive sheaves.
5. Use a 1/2” drive torque wrench applied to the
square tensioning hole [
E
] to manually rotate
the plate/pump sheave about the loosened,
but anchored, mounting bolt (bottom bolt).
Apply torque of 51 in-lbs as per
Table 6B:
Measuring Belt Deflection
for the proper
tension measurement.
