18
also possible that the isolation valves are not sealing and therefore
allowing liquid to flow from the system into the pump. Personal
injury, death and/or equipment damage may occur if great caution
is not exercised.
n) Hook a lifting hoist to the lifting eye in the top of the bearing
housing (26) and take the slack out of the cable or chain. Make
sure that all of the components of the lifting apparatus are capa-
ble of lifting the weight. Because of the above possibility, when
you loosen the gasketed joint at the back of the casing (5),
loosen the casing capscrews (5D) or the casing stud nuts (5C)
(pH3170) only one full turn. Use jack screws in the holes pro-
vided in the flange of the cradle spacer (7), or the bearing
housing (26) of the pH2110, to break the gasket seal. If fluid
and/or pressure remains in the pump, it will spray out now.
Use extreme caution, wearing protective gear, to avoid injury.
Do not proceed with disassembly until leakage ceases com-
pletely. If leakage does not cease, the isolation valves may not
be sealing. Note that if the pump was purchased without a
drain, the pump will contain fluid which will flow out at the time
the bolts (or nuts) are loosened and the gasket seal is broken.
WARNING:
When you open the pump, the fluid will be exposed to the atmos-
phere and personnel in the area. For the safety of all involved, the
risk of exposure can be reduced by flushing the cavity that was just
drained with a compatible, non-toxic, non-hazardous, stable liquid,
before disassembling the pump.
o) Remove the casing capscrews (5D) or the casing stud nuts (5C)
(pH3170) and using a mechanical lifting apparatus to support
the weight, pull the rotating unit from the casing (5).
p) Flush the wetted parts, now exposed, with a compatible, non-
toxic, non-hazardous, stable liquid.
q) Remove the gasket from the face of the casing (5) or the casing
back cover (22) dependent on which one the gasket may have
adhered to. The type of gasket and material of construction will
vary with service requirements. Attack by prying and then, if
necessary, layering off the old gasket with a sharp scraper,
attempting to remove it in the largest possible pieces. Wear
heavy leather, long sleeve work gloves when using the scraper.
Wet the gasket before and during the scraping operation to
reduce the possibility of fibers becoming airborne. Wear a res-
pirator during this operation and until all debris has been dis-
posed of in a plastic bag. Remove all of the gasket material
down to clean metal surfaces on both parts that contacted the
gasket. Place all of the gasket residue in a plastic bag, seal the
bag and dispose.
r) The rotating assembly of the pump can now be moved to a
more convenient location for further disassembly. Use mechani-
cal lifting equipment to move assemblies and components.
DISASSEMBLY PROCEDURE
To further dismantle the pump, perform the following steps in the
sequence shown:
WARNING:
Use only high quality tools.
Flush parts as disassembled to remove hazardous residue from the
pumpage and/or sub-system fluids.
Wear protective equipment as advised at the beginning of this
section.
Use mechanical lifting equipment to lift assemblies and components.
Do not apply heat to parts to assist in disassembly. Explosion could
occur causing personal injury, death, and/or damage to equipment.
Do not attempt to drill, saw or otherwise cut parts to remove them.
Explosion and/or fuming could occur causing personal injury, death,
and/or equipment damage.
Do not hammer on any parts. Personal injury and/or damage to
equipment may occur.
a) Remove gland stud nuts (15) and slide gland (13) away from
seal chamber.
b) Remove packing from stuffing box if pump is packed. Use
packing extractor.
c) Remove the impeller (3) using a wrench on the flats of the pump
coupling hub to rotate the pump shaft (29) while holding the
impeller against turning. The impeller has a hex boss to aid
removal. The impeller thread is right hand.
d) Remove the two capscrews that secure the casing back cover
(22), to the bearing housing (26) of the pH2110 and
pHP2110 series pumps, or to the cradle spacer (7) of all other
series pumps. Carefully remove the casing back cover (22) axi-
ally, so as to not damage the pump shaft (29), shaft sleeve
(10), or mechanical seal rotary (95B).
e) If the pump is equipped with a mechanical seal, loosen the set
screws that retain the seal and remove the mechanical seal
rotary (95B). Remove the mechanical seal stationary (95A) and
gland (13). Remove the mechanical seal stationary (95A) from
the gland (13).
f) Remove the impeller gasket (77A) from the end of the pump
shaft (29) or from the impeller (3) depending on where the
gasket remained when the impeller (3) was removed.
g) Remove the shaft sleeve (10) and the sleeve key (10K) from the
pump shaft (29).
h) If the pump is of the pH2140, pHP2140, pH 2170, pH 3170,
or pH2180 series, and if you desire to do so, you can remove
the spacer cradle (7) from the bearing housing (26) by remov-
ing the four capscrews that hold these two pieces together.
Normally there is no reason to remove the spacer cradle (7).
i) Remove the pump coupling hub from the pump shaft (29).
j) If the pump is fitted with an optional oil cooler (109), remove it
at this time. Remove the “
1
/2" tube X
1
/2" male pipe thread” fit-
ting from one end of the oil cooler (109). Remove the tubing nut
and tubing ferrule from the “
1
/2" tube X 1" male pipe thread”
fitting that is in the bearing housing (26) on the same side that
you removed the first fitting. Unscrew the “
1
/2" tube X 1" male
pipe thread” fitting, that is in the opposite side of the bearing
housing (26), from the bearing housing and pull the oil cooler
(109) out through the 1" NPT opening.
k) Remove the bearing end cover capscrews (28A). Pull the pump
shaft (29), bearings (25 & 25A), and bearing end cover (28)
as an assembly, axially, from the bearing housing (26).
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