SECTION 6: MAINTENANCE
AIR N ARC
®
300 SERIES ALL-IN-ONE POWER SYSTEM
®
PAGE - 88
090010-OP_r0
2. To adjust the compressor pressure, turn the
adjustment screw [
F
] clockwise to increase
the pressure and counterclockwise to lessen
the pressure.
3. After making your adjustments, position and
fasten the cover [
C
] to the pressure switch
body.
4. Close the hood, and cycle the compressor
several times to ensure the correct
pressures are set.
5. If additional adjustments are needed, repeat
steps one through six until the correct
pressures are set.
6.5.16 REPLACING AND RE-TENSIONING THE
SERPENTINE DRIVE BELTS
The compressor and generator are driven by the engine
using two belts. The belts will generally not need
replacement during the 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.
6.5.16.1 RE-TENSIONING THE AIR COMPRESSOR
SERPENTINE DRIVE BELT
Consult
Figure 6-16
, 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
NOTE
Vanair
®
recommends that the air
compressor and generator serpentine
belts both be changed at the same time
even if only one of the belts is in need of
being changed.
TOOLS NEEDED
REPLACEMENT
PART(S)
Wrench - Size 6mm Hex Head
Not Applicable
Torque Wrench, 1/2” Drive
NOTE
Proper alignment of all pulleys on the
serpentine belt is crucial. A chirping or
squeaking sound, noticeable after
replacing the belts, may indicate an
alignment problem. Always inspect and
replace the belts as recommended in the
maintenance section of this manual.
Misalignment of the V-belts can cause
unnecessary jumping and wear of the
belt, resulting in the belt coming off.
WARNING
Never operate the machine with the rear
door removed.
