AIR N ARC
®
I
-
300 SERIES ALL-IN-ONE POWER SYSTEM
®
SECTION 5: MAINTENANCE
090045-OP_r1
PAGE - 51
Ensure that the traction side of the
drive belt [
G
1
] runs on the
inside
to
directly contact the drive pulleys [
H
,
B
,
M
,
N
,
K
and
J
] that run the
generators and hydraulic pump.
Also note that the drive belt tracks
on the inside of the clutch assembly
[
M
] (closest to the engine).
3. Replace the compressor serpentine
drive belt (refer to
Section 5.4.3.2
).
At this point the belts will need to be checked
for proper tension. Consult
Section
5.4.3.3
on how to re-tension the generator
serpentine belt, and
Section 5.4.3.1
to re-
tension the compressor serpentine belt.
5.4.3.5 RE-TENSIONING THE ENGINE
HYDRAULIC PUMP DRIVE BELTS
The hydraulic pump can only be accessed
when the machine’s maintenance access
panels are removed. Once the panels are
removed, consult
Figure 5-8
, 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
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
5B: 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.
5.4.4 SERVICING THE SYSTEM FUSES
AND CIRCUIT BREAKERS
Consult
Figure 5-9
for the location of the DC
welder generator fuse, and
Figure 5-10
to
determine the location of the engine and
generator breakers.
Figure 5-11
gives the
locations of the Power System fuses.
NOTE
Vanair
®
recommends that the air
compressor and generator/ hydraulic
pump drive belts both be changed at the
same time even if only one of the belts is
in need of being changed.
TABLE 5B: MEASURING BELT DEFLECTION (All measurements given are estimations)
SPAN LENGTH (in)
DEFLECTION
DISTANCE (in)
DEFLECTION FORCE (lbs)
ALL RIBS
TORQUE TO IN-LB TENSION
RE-TENSION
NEW INSTALL
RE-TENSION
NEW INSTALL
17.91
0.25
12.000
18.5
53
81
P
F
c
q
P - Span Length
c - Center Distance
F - Deflection Force
q - Deflection Distance
Summary of Contents for AIR N ARC I 300 SERIES
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