Dover BLACKMER CRL1.5 Installation, Operation And Maintenance Instructions - Page 7
Browse online or download pdf Installation, Operation And Maintenance Instructions for Water Pump Dover BLACKMER CRL1.5. Dover BLACKMER CRL1.5 12 pages. Blackmer liquefied gas pumps
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VANE REPLACEMENT
NOTICE:
Maintenance shall be performed by qualified technicians
only.
Following the appropriate procedures and
warnings as presented in manual.
1. Drain and relieve pressure from the pump and system as
required.
2. Remove the head assembly from the outboard (non-
driven) side of the pump according to steps 4 - 9 in the
"Pump Disassembly" section of this manual.
3. Turn the shaft by hand until a vane (14) comes to the top
(12 o'clock) position of the rotor. Remove the vane.
4. Install a new vane (14), ensuring that the rounded edge is
UP, and the relief grooves are facing towards the direction
of rotation. See Figure 6.
5. Repeat steps 3 and 4 until all vanes have been replaced.
NOTE: The standard rotor & shaft has eight vanes and no
push rods. The optional rotor & shaft has four vanes and
two push rods.
6. Reassemble the pump according to the "Pump
Assembly." section of this manual.
ROUNDED EDGE OUT
Figure 6 – Vane Replacement
PUMP DISASSEMBLY
NOTICE:
Follow all hazard warnings and instructions provided in
the "maintenance" section of this manual.
NOTE: The numbers in parentheses following individual parts
indicate reference numbers on the Pump Parts List.
1. Drain and relieve pressure from the pump and system as
required.
2. Starting on the inboard (driven) end of the pump, clean
the pump shaft thoroughly, making sure the shaft is free of
nicks and burrs. This will prevent damage to the
mechanical seal when the inboard head assembly is
removed.
3. Remove the inboard bearing cover capscrews (28) and
slide the inboard bearing cover (27) and gasket (26) off
the shaft. Discard the bearing cover gasket.
NOTE: On flange mounted pumps, a bracket mount (108)
takes the place of the inboard bearing cover. To
disassemble, take apart the coupling (34) and remove the
mounting screws (28A). The bracket and gasket (26) can
then be removed from the head (20).
MAINTENANCE
RELIEF GROOVES
FACE IN DIRECTION
OF ROTATION
701-A00
4. Remove the outboard bearing cover capscrews (28) and
slide the outboard bearing cover (27A) and gasket (26) off
the shaft. Discard the bearing cover gasket.
5. To remove locknuts and lockwashers (24A and 24B):
a. Bend up the engaged lockwasher tang and rotate the
locknut counterclockwise to remove it from the shaft
b. Slide the lockwasher (24B) off the shaft. Inspect the
lockwasher for damage and replace as required.
c. Repeat steps a and b on the opposite shaft end.
6. Remove the head capscrews (21). Each head (20) has a
threaded jackscrew hole to facilitate removal. Insert a
capscrew (21) into the jackscrew hole to easily remove
head from the casing (12). NOTE: It is a good practice
to attach pump heads to the same ends they were
removed from.
7. Slide the head (20) off the shaft. The bearing (24),
mechanical seal stationary seat and stationary O-ring
(153A & 153D) will come off with the head assembly.
a. Pull the bearing (24) from the housing in the head.
b. To remove the mechanical seal stationary seat (153A),
use the blunt end of a screw driver to gently push the
backside of the stationary seat from the head. Place a
cloth under the seal to avoid damage. Be careful not
to contact the polished face of the seal during removal.
Remove and discard mechanical seal stationary O-
ring.
8. Carefully pull the rotating seal assembly, consisting of
seal jacket (153C), rotating seal face and rotating O-ring
(153B & 153E) from the shaft. Remove and discard the
rotating O-ring (153E).
9. Carefully remove the disc (71) and head O-ring (72).
10. Pull the rotor and shaft (13) from the casing (12). While
one hand is pulling the shaft, the other hand should be
cupped underneath the rotor to prevent the vanes (14)
from falling out. Carefully set the rotor and shaft (13)
aside for future vane replacement and reassembly.
11. Lay the pump flat with the remaining head facing upward
to remove the head assembly, mechanical seal, and disc
from the outboard side of the pump, as instructed in steps
6 - 9 above.
12. If necessary, remove the liner (41) by tapping around the
outside diameter of the liner with a hard wood drift and a
hammer until it is driven from the casing (12).
PARTS REPLACEMENT
1. If any of the O-rings have been removed or disturbed
during disassembly, they be replaced with new O-rings.
2. Excessive or continuous leakage from the tell-tale hole in
the bearing cover may be an indication of a damaged
mechanical seal. If a mechanical seal has been leaking, it
is recommended the entire seal be replaced. Refer to
"General Pump Troubleshooting" for possible causes of
seal leakage.
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