AIR N ARC
®
200 SERIES ALL-IN-ONE POWER SYSTEM
®
SECTION 6: MAINTENANCE
090019-OP_r0
PAGE - 81
2. Check the deflection of each belt for
looseness by applying pressure with a finger
at the center location between the pulleys,
as shown in
Figure 6-10
. The “give” should
be in the range of 3/8 to 1/2 inch for each
belt.
3. In order to remove a link or replace a belt, the
belt has to be removed from the pulleys.
Refer to
Figure 6-11
: For belt removal, grip
the outer belt with the right hand.
4. While twisting the belt outward [
A
], manually
rotate the compressor pulley with the left
hand [
B
]. The belt will slide free.
5. Repeat steps #3 and #4 to remove the inner
belt.
6. If belt is too loose, then it will need to be
resized. Consult
Section 6.5.7.4
to re-size a
poly-link belt.
6.5.7.4 COMPRESSOR BELT SIZING
When sizing a new compressor drive belt, first remove
the worn belt as explained in
Section 6.5.7.3
, Step #3
through Step # 5. Then consult
Figures 6-12
and the
following procedure:
The poly-link belts are placed so that the tab ends of the
links are facing inward, toward the pulleys, as shown in
[
C
] and [
D
].
1. Wrap new belt as shown in
Figure 6-12
, and
pull it tight around the pulleys. To determine
the length, overlap the last two holes of one
end of the belt with two tabs of the other end,
matching links as shown in [
F
].
2. Use a marker to place an identifying mark
where the excess link begins.
3. Once the belt is sized correctly, the excess
overlapping link(s) will need to be removed
before assembling the sized belt into a
completed loop. Follow the procedures given
in
Sections 6.5.7.5 and 6.5.7.6
to remove
excess belt links.
TOOLS/ITEMS NEEDED
REPLACEMENT
PART(S)
Marking Tool Such as a Black
or Blue Felt Marker
Compressor
Drive Belt No.
DR270814
(2)
IMPORTANT
Over-tightening the compressor poly-link
belt(s) will result in overloading of the
motor and belt failure, while a loose belt
will be slipping and resulting in an
unstable speed, overheating of the belt,
and high amp draw.
NOTE
Every tenth link in a poly-link belt is
designated with an arrow ([D] in Figure
6-12).
For multiple belt drives, ensure that
each belt has the same number of links.
NOTE
Since the compressor drive system
consists of two adjacent belts, each belt
should have nearly equal amounts of
deflection.
Whether removing a link or replacing a
belt, Vanair
®
recommends changing both
belts at the same time.
