19
l) Place the shaft assembly in a hydraulic press and remove the
radial bearing (25) by pressing it off of the pump shaft (29). Do
not hammer on the bearings in any way as it may result in seri-
ous damage to the bearings or the pump shaft (29).
m) If the pump is of the pH2110, pHP2110, pH2140, or pHP
2140 series, use snap ring pliers to remove the large tapered
retaining ring (75B) from the bearing end cover (28). If the
pump is of the pH2170, pH3170, or pHP2180 series, use an
Allen wrench to loosen the bearing lock ring screws (231A).
Remove the bearing lock ring screws (231A), the lock ring
washers (231B), and the bearing lock ring (231). Slide the
bearing end cover (28) and the rear labyrinth seal (76A) as an
assembly, axially, off the thrust bearing (25A) and the end of
the pump shaft (29).
n) If the pump is of the pH2110 or pHP2110 series, use snap ring
pliers to remove the tapered retaining ring (75A) from the
pump shaft (29). If the pump is of the pH2140, pHP2140,
pH2170, pH3170, or pH2180 series, bend the tab of the
bearing lock washer (31A) out of the slot in the bearing lock
nut (31). Remove the bearing lock nut (31) and bearing lock
washer (31A) from the pump shaft (29).
o) Press the thrust bearing(s) (25A) from the pump shaft (29). Do
not hammer on the bearings in any way as it may result in seri-
ous damage to the pump shaft (29).
p) If the pump is of the pH2110 or pHP2110 series, press the
front labyrinth seal (76) from the front of the bearing housing
(26).
q) If the pump is of the pH2140, pHP2140, pH2170, pH3170,
or pH2180 series, press the seal ring (27) and the front
labyrinth seal (76), as an assembly, from the front of the bear-
ing housing (26). Press the front labyrinth seal (76) from the
seal ring (27).
r) Press the rear labyrinth seal (76A) from the bearing end cover
(28).
s) Remove the o-rings from the O.D. and the I.D. of both the
labyrinth seals (76 & 76A).
t) Remove the end cover gasket (77B), which is an o-ring, from
the bearing end cover (28).
u) Remove the bearing housing vent (80) and the bull’s eye sight
glass from the bearing housing (26).
v) If so desired, the bearing housing foot (9), of the pH2140,
pHP2140, pH2170, pH3170, and pH2180 series, pumps,
can be removed from the bottom of the bearing housing (26).
w) Clean and inspect all parts. Discard and replace any damaged
or worn parts.
REASSEMBLY PROCEDURE
WARNING:
Use only high quality tools.
Wear protective equipment as advised at the beginning of this
section.
Use mechanical lifting equipment to lift assemblies and components.
Do not hammer on any parts. Personal injury and/or damage to
equipment may occur.
Do not attempt to manufacture parts or modify Dean Pump parts in
any manner. Death, personal injury, and/or damage to equipment
may occur. One example of the above would be overboring the
stuffing box or the seal chamber, which removes metal that is
required to contain fluids. Removal of this metal reduces the pres-
sure containing capability of the part and may create a leak path
through the part. If the part separates two different fluids, mixing of
the fluids could cause an explosion. Water leakage into a heat
transfer liquid is one example of an explosive possibility.
Replace all gaskets, seals, bearings, and lubricants. Replace all parts
that have worn, corroded, eroded, or otherwise deteriorated.
Use only Dean Pump Division of Met-Pro Corporation parts.
To reassemble the pump, perform the following steps:
a) Clean all parts thoroughly.
b) If the pump is of the pH2140, pHP2140, pH2170, pH3170,
or pH2180 series, and if the bearing housing foot (9) was
removed, bolt it back to the bearing housing (26). Be sure that
the dowel pins are in place between the foot (9) and the hous-
ing (26). Tighten the capscrews to 50 ft. lb for series pH2140,
pHP2140, pH2170, pH3170 pumps. Tighten the capscrews to
80 ft. lb for series pH2180 pumps.
c) Apply pipe sealant to the threads of the bull’s eye sight glass
and tighten it into the side of the bearing housing (26). Torque
to 50 ft. lb.
d) Install the vent (80), without thread sealant, into the top of the
bearing housing (26). Tighten to 20 ft. lb.
e) Install new o-rings onto the O.D. and into the I.D. of both the
labyrinth seals (76 & 76A). Lubricate the o-rings on the O.D. of
both labyrinths.
f) If the pump is of the pH2110 or the pHP2110 series, press the
front labyrinth seal (76) into the front of the bearing housing
(26). The “expulsion port” (the slot in the O.D.) of the labyrinth
(76) must be positioned so that it is towards the bottom of the
bearing housing (26).
g) If the pump is of the pH2140, pHP2140, pH2170, pH3170,
or pH2180 series, press the front labyrinth seal (76) into the
seal ring (27). Press the seal ring (27), labyrinth seal (76)
assembly into the front of the bearing housing (26). The “expul-
sion port” (the slot in the O.D.) of the labyrinth (76) must be
positioned so that it is towards the bottom of the bearing hous-
ing (26).
h) Press the rear labyrinth seal (76A) into the bearing end cover
(28). The “expulsion port” (the slot in the O.D.) of the labyrinth
(76A) must be positioned inline with the “oil return” (slot in the
bore) of the end cover (28).
i) Press a new thrust bearing(s) (25A) onto the pump shaft (29)
and against the shaft shoulder. Do not hammer on the bearings
in any way as it will result in serious damage to the bearings or
the pump shaft. Press on the inner race of the bearing only, do
not press on the outer race of the bearing. The thrust bearing in
the pH2170 and pH3170 series pumps is made up of a
matched pair of angular contact bearings that must be installed
“back-to-back”. See the cross sectional drawing for the
pH2170/pH3170 pumps.
