
13
GENERAL
The Fybroc pump is designed for easy inspection and
service because of its back pullout construction. For
inspection or replacement of certain parts, the work
can be done in place, without the necessity to remove
the complete pump to a maintenance area. Refer to
applicable Sectional Drawing in this manual for item
numbers mentioned below.
Before any work is done the following procedures and
precautions should be taken:
1) The electric motor should be either disconnected from
its power source, or the switch or circuit breaker must
be secured in an “off ” position so that the motor
cannot be accidentally started.
2) Depending upon the uid being pumped, the proper
protective equipment should be worn (gloves, mask,
respirator, goggles or safety glasses, etc.) to prevent
contact with the uid in the pump or pipelines.
3) Check the valves on the suction and discharge lines to
be sure they are closed and secured.
4) If the mechanical seal is ushed from an external
source, turn off the valve in the supply line and
disconnect the ush line.
5) The liquid trapped in the pump and piping should be
drained. Care should be taken to either trap the uid
in a container or to divert it to a proper disposal area
so that the area around the pump and base will not be
contaminated.
DISASSEMBLY
1) If the complete pump is to be removed to a
maintenance area, remove the bolts holding the motor
and casing to the baseplate. Remove the bolts on the
suction and discharge ange connections. Now the
whole pump can be removed. If the casing is to be
left in place remove the screws holding the motor to
the baseplate and then remove the casing bolts, nuts,
washers and shims securing the casing to the cover
and motor adapter (Items 1C, 1D, 1E, 67). Now the
rotating assembly can be pulled away from the casing
and removed. Note the number of shims removed.
Two jackscrews (Item 19D) are provided to ease
disassembly.
2) If the casing was removed with the pump, remove the
casing bolts, nuts, washers and shims securing the
casing to the cover and frame adapter (Items 1C, 1D,
1E, 67). The rotating assembly can be pulled away
from casing. Note the number of shims that were
removed. Two jackscrews (Item 19D) are provided to
ease disassembly. Now the pump can be placed in a
convenient location to disassemble it.
3) Remove the cover o-ring (Item 73) and place in a
container with the casing hardware.
4) To disassemble the impeller assembly, remove the
locking ring (Item 14 B) by removing the two Allen
head screws, thus exposing the segment key (Item
14A), which can now be removed from the impeller
sleeve.
5) If the pump is provided with a mechanical seal utilizing
set screws to drive the seal, loosen the set screws.
If the mechanical seal is of the preset outside type,
reinstall the seal setting clips, prior to loosening the
set screws.
6) Remove rear fan cover from motor; use vise grips or
pipe wrench to hold rear motor shaft extension from
turning. Remove fan if required. Do not attempt to
hold fan. The impeller assembly can now be removed
by turning the impeller in a counter-clockwise direction
facing the impeller. A strap wrench or similar device
may be required to disengage the screw threads.
The impeller, stufng box cover, and seal can now be
removed as a unit.
7) If the mechanical seal is a single outside seal be sure
the set screws are loose and pull the rotary seal
assembly off the sleeve, using a twisting motion as
it is removed. The impeller (Item 2) can be removed
from the cover. Remove the four bolts and washers
(Item 17C, 17E) securing the gland (Item 17) to the
cover (Item 11) and remove the gland and then the
seal stationary from the cover. The carbon and ceramic
elements of the seal should be handled carefully to
prevent chipping or scratching. If the mechanical seal
is a double inside seal, remove the four bolts and
washers (Item 17C, 17E) securing the gland (Item
17) to the cover (Item 11) and remove the gland. Be
sure the set screws are loose, and pull the rotary seal
assembly off, using a twisting motion as it is removed.
The impeller (Item 2) can be removed from the cover.
Next remove the stationary seal faces from the gland
and cover by gently pressing them out using your
thumbs. The carbon and ceramic elements of the seal
should be handled carefully to prevent chipping or
scratching.
8) The motor shaft adapter (Item 6) may be removed
from the motor shaft by removing the Allen head
screw (Item 6A). The drive key (Item 46) will slide off
with the shaft adapter. In the bore of the shaft adapter
there may be some shims to take up the motor
manufacturer’s shaft length tolerances. Be sure to note
the number and thickness of the shims used.
9) Remove pump adapter (Item 71) and motor adapter
(Item 71B) if provided.
ASSEMBLY/DISASSEMBLY PROCEDURES FOR HORIZONTAL PUMPS