Graymills QC - Manual

795-91382
02-10
Graymills Corporation – 3705 N. Lincoln Ave. – Chicago, IL USA – www.graymills.com
Graymills
QC Series Pumps
In order to ensure the safe operation, never operate pump without motor installed snugly against the
flange. Read all warnings and cautions in OMI #795-08260 before any service work.
For proper pump cleaning and maximum bearing life, both motor and bearing cartridge should be
removed from housing.
Removing/Installing Motor
To remove: Make sure motor is cool.
a. QC Models- Remove pin clips from retaining screws below mating flange of bearing housing.
b. QCE Models- Remove pin clip from the retaining screw above mating flange of bearing
housing.
c. Using handle, lift motor away from mating flange. DO NOT USE ELECTRICAL
CONNECTIONS FOR LIFTING.
To install motor:
1. QC Models- If installing motor on bearing housing for first time, install threaded retaining
screws to proper depth. Place the motor on top of bearing housing so retaining screws
protrude below bearing housing flange. Adjust retaining screws so hole in screw protrudes just
below housing flange.
2. QCE Models- If installing motor on bearing housing for the first time, thread retaining screws
into bearing housing flange. Place motor on top of the bearing housing so retaining screws
protrude above motor flange. Adjust retaining screws until hole in screw just protrudes above
motor flange.
3. Both Models- Insert pin clip into the retaining screw. Twist clip in a ratcheting motion, tighten
retaining screw down until flanges on motor and bearing housing are mated tightly.
Removing Bearing Cartridge from Housing- QC and QCE Series
To obtain ultimate bearing life, bearing cartridge should be removed before cleaning pump
body.
Tools Required: 4mm hex key and two 5/8” open-end wrenches
1. Remove Motor as described above.
2. Remove (2) 4mm screws located inside bearing housing with hex key. This will allow shaft to
“float” and makes bearing cartridge removal easier.
3. Place (2) 5/8” open end wrenches on straddle-milled slots on the upper and lower sections of
the pump shaft. NOTE: Shafts are threaded with a left-hand thread, thus loosening
requires turning clockwise