SECTION 6: MAINTENANCE
AIR N ARC
®
300 SERIES ALL-IN-ONE POWER SYSTEM
®
PAGE - 84
090034-OP_r0
6.6.7.2 P
ART
II – A
CCESSING
THE
C
OMPRESSOR
U
NIT
S
HAFT
S
EAL
1. Loosen and remove the drive sheave
capscrew [
G
], washer [
H
] and sheave
washer [
J
] securing drive sheave [
K
] into
place.
2. Remove the drive sheave [
K
] from the end of
the male rotor drive shaft [
Z
].
3. Remove key [
Y
] from the groove in the end of
the male rotor drive shaft [
Z
].
4. Loosen and remove the four (4) M8
capscrews [
L
], and also the lock washers
[
M
], and sheave washers [
N
] securing the
tensioner plate [
P
] into place.
5. Remove the four pan head capscrews [
Q
],
securing the front cover [
R
] to the front of the
compressor unit.
6. Remove the front cover [
R
] to expose the seal
assembly. Remove the worn o-ring [
S
], shaft
seal ring [
T
], seal o-ring [
U
], inner ring [
V
],
spacer [
W
] and needle bearing [
X
] from the
end of the male rotor drive shaft [
Z
].
7. Wipe down any excess contaminants that
may have accumulated on the male rotor
drive shaft.
8. Replace the needle bearing [
X
] and spacer
[
W
] with their new counterparts from the kit.
9. Replace inner ring [
V
] with its new counterpart
from the kit; the inner ring should be gently
tapped into place using the tool as a guide.
Note that it should seat snugly on the spacer
[
W
].
10. Replace metal seal o-ring [
U
] within the lip-
end of the new shaft seal ring [
T
] (both parts
from the kit).
11. Gently tap the shaft seal ring [
T
] onto the
male rotor [
Z
].
12. When the edge of shaft seal ring [
T
] is flush
with the inner ring [
V
] on the shaft, the shaft
seal is in position.
13. Lubricate new o-ring [
S
] with the silicon
lubrication supplied with the kit.
14. Place o-ring [
S
] within the groove on the
inside of the compressor cover [
R
].
NOTE
Before attempting to affix the seal to the
shaft, make note that the lip-end side of
the shaft seal (which contains the seated
metal seal o-ring [U]), faces the rotor.
