
UNIBLOC-PD Operation & Service Manual: PD600-677 23
ROTORS
ROTOR HOUSING
SHAFTS
BEARING HOUSING
SEAL CARTRIDGE O-RINGS (OUTER)
SEAL CARTRIDGE
SEAL CARTRIDGE O-RINGS (INNER)
WEAR SLEEVES
WEAR SLEEVE O-RINGS
RETAINING RING BOLTS
(4 or 8 Bolts Per Seal)
RETAINING RINGS
REAR VEW- ROTOR HOUSING
FRONT VEW- ROTOR & BEARING HOUSING
REAR ROTOR HOUSING STUD NUTS
fig. 4.11
SEAL REMOVAL TOOL
(P.N. 6011)
SHOULDER SCREWS
SEAL FLUSH HOUSING
1. Insert shoulder screws into key slots
on Seal Cartridge
2. Ensure that the removal tool is
engaged with Seal Cartridge by slightly
twisting tool in clockwise direction
Double O-ring Seal Removal with Seal Removal Tool
3. Remove Seal Cartridge by pulling
tool away from pump.
fig. 4.12
4.4.5.3.1 Double O-Ring Seal Removal- MODELS: PD602, PD652, PD677
(reference figs. 4.1, 4.11, 4.12)
Slide the
Rotors
off the
Shafts
. If the rotors will not slide off they can be removed simultaneously with the
Rotor
Housing
. Unless they are being replaced,
DO NOT USE PLIERS OR CHANNEL LOCKS TO REMOVE THE RO-
TORS. THEY WILL BE DAMAGED.
Pry the
Seal Cartridges
from rear of
Rotor Housing.
Alternatly, the
Seal
Cartridges
can be removed with the use of the Double O-ring Seal removal tool
6011
(see fig. 4.12 and section
6.3.2). The
Wear Sleeves
may come out with the
Seal Cartridges
. If so, remove the
Wear Sleeves
from the
Seal
Cartridges
and remove the
Seal Cartridge O-rings
(inner & outer). Remove
Wear Sleeves
from shafts if they did not
come out with the
Seal Cartridges
. Once off the
Shafts
, remove the
Wear Sleeve O-rings
. If servicing the
Bearing
Housing
, remove the
Rotor Housing
by first disconnecting the flushing system, if applicable, and loosening the
Rear
Rotor Housing Stud Nuts
. Use a hoist and eye bolt to support the
Rotor Housing
. Tap on the ports with a rubber
mallet and pull the
Rotor Housing
off. The
Retaining Rings
do not have to be removed to service the seal.