-.
2.) Assure that the scavenge line itself is not plugged.
3.) Inspect the perfcmnance of the scavenge line check
valve for sticking. If the check valve is stuck in the
open positiou lubricaut can back flush horn the air end
into the seal cavity and appear as a leak. If the check
valve is stuck closed the seal cavity will not scavenge if
needed.
4.) Shaft seal replacement on QSVI models require the
removal or relocation of the drive motor to allow use of
the wear sleeve removal and installation tools.
5.) Remove the drive coupling guards and coupling
halves. Remove the drive coupling hub and woodruff
key from the compressor shaft.
6.) Remove the four bolts and lock washers that secure
the seal adapter to the suction housing.
7.) wsert two of the seal adapter retaining bolts into
the seal adapter jack holes and turn clockwise pushing
the seal adapter away from the suction housing.
8.) After the seal adapter outer O-ring has cleared the
seal adapter bore, the adapter can be removed for
inspection. Disassemble the seal adapter for inspection
m service by taking the following steps:
a.) With the face of the seal adapter up, insert
two small, flat screw drivers under the outer
lip of the fluid slinger and pop the slinger
from the seal adapter bore.
b,) Using a brass drift, tap the shatl seal
assembly from the seal bore.
c.) Inspect both seal lips for excessive wear or
lip flaws or damage.
d.) Inspect the outer O-ring on the fluid
slinger for cuts or nicks.
e.) Inspect the outer O-ring on the seal adapter
for cuts and nicks.
f.) Use the tools listed in the Parts
Manual for your svecific machine needs.
g.) To remove the seal wear sleeve, slide the
wear skeve removal tool over the end of the
shaft and allow the jaws of the tool to snap on
the backside of the wear sleeve. Tighten the
outer shell of the tool down over the inner
jaws. Using a ratchet and socket, turn the
puller jack screw clockwise in against the end
of the rotor shaft
! ~Au~~N~
Do Not use an impact wrench with this tool.
Preparation for New Seal Installation
1.) Inspect the rotor shaft for burrs or deep scratches at
the wear sleeve area. Using a 100 grit emery cloth,
lightly sand horizontally any rust or “LOCTITE@”that
was between the wear sleeve and rotor shaft. Using a
fine tile or emery clo~ deburr ‘thewoodruff key area of
the rotor shaft and cover the keyway with masking tape
to prevent any damage to the new seal during
installation.
2.) Clean the seal adapter with clean, fast drying
solvent. Assure that the scavenge line fitting and cavity
is clean and open. Place the outer face of the seal
adapter on a flat hard surfhce. Remove the new triple
lip seal from the package and inspect for damage or
imperfections on the seal lips. With the adapter sitting
on the outer face, the mechanic would be looking down
cmthe two lips that face the same direction facing
toward the rotor and the single lip facing the scavenge
cavity and drive motor..
3.) With the lips of the seal facing the correct direction,
apply a thin coat of “LOCTITE 290@” to the outer steel
case of the seal and position the seal in the seal adapter
bore. Insert the proper seal driver over the seal. &
Parts Manual for tool list for your snecific machine
needs. Insert the proper wear sleeve driver in the seal
driver and tap the new seal into the bore with a
medium sized hammer.
4..) Preheat the seal wear sleeve to 350’?3in a small
oven. Do not preheat in warm oil. Apply a thin film of
“LOCTTIIY to the inner diameter of the wear sleeve
and immediately install on the compressor shaft using
the proper wear sleeve driver. Drive the wear sleeve on
the shaft until the driver bottoms on the shaft shoulder,
Seal Installation
1.) Apply a thin coat of compressor fluid to the outer
face of the seal wear sleeve and seal lip.
2.) Cover the keyway in the compressor shaft with
masking tape so there is no chance of damage occurring
to the seal face during installation.
3.) Slide the proper seal installation sleeve against the
wear sleeve with the taper toward the end of the rotor
shaft. Install a new O-ring on seal adapter and
lubricate with compressor fluid. carefully slide the
seal adapter with the new seal installed over the end of
the rotor shaft and up against the adapter bore.
Page 50
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