AIR N ARC
®
150 SERIES
SECTION 5: MAINTENANCE
090043-OP_r0
(MARCH - 2015)
PAGE - 41
VANAIR MANUFACTURING, INC.
(800) 526-8817 • www.vanair.com
4. After the belt is seated into the
compressor pulley groove, hold
the belt and the pulley with the
left hand (
Figure 5-7, Step #2
),
while rotating the pulley in the
direction shown. At the same
time, feed the belt upward with
the right hand as the pulley is
turned (
Figure 5-7, Step #3
).
The belt will slip into place once
the left hand, which is holding
the belt, reaches near the top of
the compressor pulley.
5.5.3.8 RE-TENSIONING OR
REPLACING THE GENERATOR
SERPENTINE BELT
The generators are driven by the engine
using a serpentine belt. This belt has a
spring tensioner end that will generally not
need to be re-tensioned during the service
life of the generator system. However, over
time it may become loose and need to be
tightened. The proper tension can be
determined by using a tension tester to
measure the deflection from a given force.
The belt guard must be removed to access
the drive belt. The 150 Series system utilizes
a single serpentine v-belt to drive the
generator system.
Consult Section 5.5.3.1,
Accessing the Drive Belts
, for instructions
on how to remove the belt guard.
5.5.3.9 RE-TENSIONING THE
GENERATOR SERPENTINE BELT
To re-tension the generator serpentine belt,
consult
Figure 5-8
. Once the generator drive
belt is established onto the engine, generator
and idler pulleys, the spring tensioner on the
idler pulley will self-adjust the belt. There is
no additional adjustment required.
5.5.3.10 REPLACING THE GENERATOR
SERPENTINE DRIVE BELT
In order to replace the generator serpentine
belt, the compressor belts will need to be
removed. Consult
Section 5.5.3.3
, Steps #3
and #4 to remove the compressor belts.
To replace the generator serpentine belt,
refer to
Figure 5-8
and the following
procedure:
1. With the machine off, the ignition
key removed, the positive (+)
battery cable disconnected from
the battery, and the compressor
v-belt removed, the worn
generator serpentine belt can
now be replaced.
2. Loosen the generator belt by
performing the procedure given in
Section 5.5.3.9, Re-Tensioning
the Generator Serpentine Belt
.
By loosening the tensioner plate
bolt (item [
C
] in
Figure 5-8
), and
pivoting the generator idler
sheave assembly to its maximum
position, the generator belt will be
loosened enough to remove it
from the generator and engine
drive pulleys.
3. Run a new serpentine belt into
place about the generator, engine
and idler pulleys as shown in
Figure 5-8
. Keep in mind when
tracking the belt that the tread-side
faces the inside of the driver
pulleys, as shown in item [
F
].
4. After the belt has been situated
onto each track groove on the
generator and engine drive
pulleys and the idler, the tension
will need to be reset via the
position of the idler sheave
assembly, and checked.
5. After the generator serpentine
belt has been set and checked,
the compressor drive belt needs
to be repositioned on the pulleys.
Consult
Section 5.5.3.7,
Tracking Compressor Belt
Onto Pulley Groove
to reset the
compressor drive belt. Refer to
Section 5.5.3.3, Re-tensioning
the Compressor Drive Belt
to
assure that the compressor belt
is properly tensioned.
