Compressor Shaft Fluid Seal - Quincy QSF Series Instruction Manual

Compressor Shaft Seal
Compressor shaft seals are wear items that may eventually have to be replaced. A complete
understanding of the installation procedure and special tools are required for a successful seal
replacement. Should you decide to replace the seal yourself, be certain to ask your Quincy distributor
for the complete illustrated instructions (available as a Service Alert) at the time you order the seal and
special tools. If your distributor does not have a copy of these instructions, ask him to order a copy from
Quincy Compressor Division at no charge.
QSF 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:
If the check valve is stuck closed the seal cavity will not scavenge. On QSF 50/60 units, inspect the
check valve by removing the fitting located at the bottom of the motor adapter. On QSF 75-100 remove
the fittings located at the bottom of the seal adapter. Remove the check ball and inspect for wear.
Replace if necessary.
1. Shaft seal replacement on the QSF requires the removal of the drive motor to allow use of the wear
sleeve removal and installation tools.
2. Remove motor after coupling guards and coupling halves are removed. Remove the drive coupling
hub and key from the compressor shaft.
3. Remove the four bolts that secure the seal adapter to the suction housing.
4. Insert 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.
5. After the seal adapter outer O-ring has cleared the seal adapter bore, the adapter can be removed
for inspection. Assure that bearing shims are not lost or bent during the removal process.
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, 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.
clockwise in against the end of the compressor shaft. Caution! Do not use an impact wrench
with this tool.
Using a ratchet and socket, turn the puller jackscrew
Quincy Compressor – QSF Series
Section V– Servicing
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