Re-Tensioning The Air Compressor Serpentine Drive Belt; Replacing The Air Compressor Serpentine Drive Belt; 090045-Op_R1 - Vanair AIR N ARC I 300 SERIES Operation Manual

SECTION 5: MAINTENANCE
A
C
D
service life of the compressor system.
However, you may find that over time they
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.
5.4.3.1 RE-TENSIONING THE AIR
COMPRESSOR SERPENTINE
DRIVE BELT
Consult Figure 5-3 , and the following
procedure.
1. With the machine off and the ignition
key removed, open and remove the
front panel.
2. Loosen the four tensioner plate bolts
[ A ] mounting the tensioner plate [ C ] to
the compressor only enough to allow
tensioner plate to rotate/slide along
the grooves in the plate while still in
position ( DO NOT remove).
This allows the idler sheave [ B ] to
change position, causing the belt to
be loosened or tightened.
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 40 ft-
lbs.
PAGE - 46
AIR N ARC
B
B
1
B
2
Figure 5-2: Pressure Switch Location
5.4.3.2 REPLACING THE AIR

090045-OP_r1

®
I-300 SERIES ALL-IN-ONE POWER SYSTEM
KEY DESCRIPTION
A PRESSURE SWITCH
B COMPRESSOR CUT-IN PRESSURE
ADJUSTMENT SCREW
B TYPE "A" SWITCH SCREW LOCATION
1
B TYPE "B" SWITCH SCREW LOCATION
2
C BATTERY (reference)
D DC WELDER GENERATOR
(reference)
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 to secure the
tensioner into position.
COMPRESSOR SERPENTINE
DRIVE BELT
To replace the air compressor serpentine
belt consult Figures 5-4 and 5-5 , and the
following procedure:
With the machine off and the ignition key
removed, open and remove the access
panel.
BELT ACCESS AT CLUTCH (Figure 5-4)
1. Release the electrical connection wire
[ B ] fastened at the front of the clutch
plate [ C ]. Note that this wire is also
secured at the harness cable clamp [ G ]
NOTE
It is not necessary to remove the zip tie
securing the clamp to the wire.
2. Locate the clutch retaining cable ([ H ]
in Figure 5-4 ) secured to the floor of
the machine near the clutch apparatus
of the engine.
®
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