Quincy Compressor 50093-103 - Manual (Page 56)

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QSVI compressor units incorporate a fluid scavenge
system to complement the use of the triple lip seal
assembly. Any complaint of shaft seal leakage requires
that the scavenge system be inspected for proper
operation prior to the replacement of the shaft seal. Proper
inspection consists of the following:
1.) Check to assure that the scavenge line fitting at the
bottom of the scavenge line cavity is open and clear.
2.) Assure that the scavenge line itself is not plugged.
3.) Inspect the performance of the scavenge line check
valve for sticking. If the check valve is stuck in the
open position, lubricant can back flush from 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.) Insert two of the seal adapter retaining bolts into the
seal adapter jack holes and tam 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 or service by taking the following steps:
a.) With the face of the seal adapter up, insert two
small, flat screwdrivers under the outer lip of the
fluid slinger and pop the slinger from the seal
adapter bore.
b.) Using a brass drift, tap the shaft 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
specific machine needs.
g.) To remove the seal wear sleeve, slide the wear
sleeve 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 jackscrew clockwise in
against the end of the rotor shaft.
! CAUTION !
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 file or emery cloth, deburr the woodruff 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 surface. 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 on the 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. See Parts Manual for tool list for your specific
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.