
24 UNIBLOC-PD Operation & Service Manual: PD600-677
ROTOR BOLT WASHERS
ROTOR BOLTS
(1 or 3 Bolts Per Rotor)
LOCK WASHERS
ROTOR BOLT O-RINGS
ROTOR BOLT WASHER O-RINGS
ROTOR HOUSING
ROTORS
fig. 4.13
FRONT COVER STUD NUTS
FRONT COVER
FRONT COVER O-RING
FRONT COVER STUDS
ROTOR HOUSING DOWEL PINS
fig. 4.14
4.4.5.3.2 Double O-Ring Seal Installation- MODELS: PD602, PD652, PD677
(reference figs. 4.1, 4.9, 4.11)
Clean all components prior to installing the seals. Check the
Wear Sleeves
and
Wear Sleeve O-rings
for excessive
wear. If grooves are noticeable, the
Wear Sleeves
may have to be replaced. Otherwise, the inner
Seal Cartridge
O-rings
may not seal properly or may fail prematurely. Coat all surfaces that will have contact with o-rings with a lu
-
bricant approved for contact with the pumped product. Place new
Wear Sleeve O-rings
into the grooves of the
Wear
Sleeves
. Slide the
Wear Sleeves
on the
Shafts
and locate on the
Anti-Rotation Pins
(see fig. 4.9). Place new
Seal
Cartridge O-rings (inner and outer)
into the grooves of the
Seal Cartridges
. 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
the seal installation tool
6012
(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. Slide the
Rotors
on the
Shafts
. See section
4.4.6 for completing the installation.
4.4.6 Seal Installation- Final Steps
(reference fig. 4.1, 4.13, 4.15, 4.27)
See section 6.3 for torque limits. For QuickStrip
®
rotors (see fig. 4.2), visually check that the rotors are below the front
surface of the rotors housing. If they are not, remove the rotors and check that the shaft seals have been properly
installed. Insert the rotors and turn them to make sure they do so freely. Place the
Front Cover O-ring
in the groove
on the front of the
Rotor Housing
. Make sure all
Front Cover Studs
are torqued. Place the
Front Cover
on the pins
(if present) and install and tighten the
Front Cover Stud Nuts
according to the specified torque. Check the oil level
in the bearing housing as described in section 6.2. If flushed seals were installed, reconnect the flush tubing. Refer to
section 3.3 before starting the pump.
For stainless steel rotors, if the
Rotor Bolt Washers
were removed, replace and lubricate the
Rotor Bolt Washer
O-rings
and
Rotor Bolt O-rings
. Slide
Rotor Bolt Washers
into the
Rotors
. Place a nonmetal object between the
rotors to keep them from turning. Install the
Rotor Bolts
in the
Shaft
ends but do not torque them (see fig. 4.13).
Remove the nonmetal object and turn the rotors to make sure they do so freely. Measure the clearances between the
Rotor Housing
and the
Rotors
. Compare these values with those listed in section 6.3. If the measured clearances at
positions 1-7, 8, and 10 are smaller than those listed, the rotors must be ground and polished to achieve the correct
values. If the measured clearances at positions 9 and 11 are not within the tolerances listed the rotor housing must be
shimmed by removing it and changing the
Shims
as instructed in section 4.5 (see fig. 4.7).
If the clearances are correct, tighten the
Rotor Bolts
(in a circular pattern, multiple times) to the torque specified in
section 6.3.1. Make sure all
Front Cover Studs
are torqued. Place the
Front Cover
on the
Rotor Housing Dowel
Pins
(if present) and tighten the
Front Cover Stud Nuts
according to the specified torque (see fig. 4.14). Check the
oil level in the
Bearing Housing
as described in section 6.2. If flushed seals were installed, reconnect the flush tub
-
ing. Refer to section 3.3 before starting the pump.