
22 UNIBLOC-PD Operation & Service Manual: PD600-677
4.4.5.2.1 Double O-Ring Seal Removal (FRONT LOADED)- MODELS: PD600, PD650, PD675
(reference figs. 4.1, 4.9, 4.10)
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.
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 Car-
tridges
. 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.
4.4.5.2.2 Double O-Ring Seal Installation (FRONT LOADED)-MODELS: PD600, PD650, PD675
(reference figs. 4.1, 4.9, 4.10, 4.15)
Clean all components prior to installing the seals. If the
Rotor Housing
was removed, assemble it to the
Bearing
Housing
first. Make sure
Retainer Rings
are attached to the
Rotor Housing
. Using an eye bolt, hoist the rotor
housing on the
Dowel Pins
(see fig. 4.15 on pg. 24) and slide it on, while at the same time threading on the
Rear
Rotor Housing Stud Nuts
. Tap the
Rotor Housing
with a rubber mallet to seat it properly against the
Bearing Hous-
ing
. Tighten the
Rear Rotor Housing Stud Nuts
in a cross pattern. Check the
Wear Sleeves
for excessive wear. If
grooves are noticeable, the sleeves may have to be replaced, otherwise the seal may not function properly or may fail
prematurely. Coat all
O-rings
,
Shafts
, and the seal surface of the
Wear Sleeves
with a lubricant that is acceptable for
contact with the product. Slide the
Wear Sleeves
on the
Shafts
and locate on the
Anti-Rotation Pins
(see fig. 4.9).
Slide mounting sleeve
6192B
(see section 6.3.2) over the splined end of the shaft and lubricate the surface of the
mounting sleeve. Place new
Seal Cartridge O-rings
into the grooves on the outside and inside of the
Seal Cartridg-
es
. Slide the
Seal Cartridge
on the mounting sleeve. Rotate the
Seal Cartridge
if necessary so that it will slide in the
slots of the
Retainer Ring
. Tap the
Seal Cartridge
into the
Rotor Housing
seal bore using mounting sleeve
6192A
(see section 6.3.2). When properly installed the
Seal Cartridge
will bottom out against the
Retainer Ring
and will
be flush or slightly below the seal bore face. Remove the mounting sleeves and repeat for the other
Shaft.
Slide the
Rotors
on the
Shafts
. See section 4.4.6 for completing the installation.
WEAR SLEEVE
OUTER O-RINGS
ROTORS
SEAL CARTRIDGE
WEAR SLEEVE O-RINGS
ROTOR HOUSING
SHAFTS
BEARING HOUSING
RETAINING RINGS
REAR VEW- ROTOR HOUSING
FRONT VEW- ROTOR & BEARING HOUSING
INNER O-RINGS
REAR ROTOR HOUSING STUD NUTS
fig. 4.10