BLACKMER 111-G01, Installation, Operation And Maintenance Instructions

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111-G00 Page 9/16
MAINTENANCE:
PUMP DISASSEMBLY
NOTICE:
Maintenance shall be performed by qualified technicians
only. Follow the appropriate procedures and warnings
as presented in this manual.
NOTE:
The numbers in parentheses following individual parts
indicate reference numbers on the Pump Parts List.
1. Flush the pump per instructions in this manual. 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 removed.
3. Remove the head cap screws (21A). Gently remove the
head from the casing. The head O-ring should come off
with the head assembly.
4. Loosen the three set screws of the ball bearing 1-2 full
turns with a 2.5mm hex key wrench. Lightly tap the end of
the exposed shaft with a hard wood drift and a hammer
until the bearing shaft sleeve releases the shaft.
5. Remove the rotor and shaft (13) from the casing. While
one hand is pushing the shaft, the other hand should be
cupped underneath the rotor to prevent the vanes (14)
and pushrods (77) from falling out. As the rotor & shaft
are removed further, carefully support the shaft so it does
not drop and damage the sleeve bearing or finished
surfaces of the shaft or the rotating seal face as it is
removed. Carefully set the rotor and shaft aside for future
vane replacement and reassembly.
6. To remove the casing. Lay the pump on end with the
bearing housing facing upward and remove the 4 cap
screws (21A). Lift off the bearing housing and remove the
Inboard Head (20). Remove the casing O-ring (71) from
between the inboard head and the casing.
7. The mechanical seal & spring assembly should come out
with the shaft. The stationary seat and stationary seal ring
need to be removed from the seal cover (126).
a. To remove the seal cover remove the 4 cap-screws
(21A) holding it in place.
b. Slowly slide the seal cover away from the inboard head
until it can be removed. Remove and discard the seal
cover O-ring (51).
8. Carefully pry the stationary seal elements (153A) from the
seal cover (126). Be sure not to scratch the seal face or
damage the elastomer seal seat.
9. If necessary, remove the liner (41) from the casing (12) by
tapping around the outside diameter of the liner with a
hard wood drift and a hammer until it is driven from the
casing.
10. Remove the ball bearing adjuster (188) by loosening the
set screw (189) and turning it counter clockwise with a
strap wrench or spanner wrench.
11. If necessary for replacement, remove the ball bearing
(24C) from the bearing adjuster. Turn the bearing adjuster
so the threaded side is up. Using an appropriately sized
arbor press remove the bearing (24C) from the bearing
adjuster. Discard old bearing and replace with new one.
See step 2 of “Pump Assembly”
12. Only disassemble rotor & shaft if necessary for part
replacement
. Disassemble the rotor (13B) and shaft
(13A) by removing the cap-screws (13C). See figure 7.
Figure 7 (PVS10/15 rotor shown)
PARTS REPLACEMENT
1. If any of the O-rings have been removed or disturbed
during disassembly, they need to be replaced with new
O-rings.
NOTE: PTFE O-rings should be heated in hot water to aid
installation.
2. Excessive or continuous leakage from around the seal
housing or in the bearing housing 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.
3. Inspect bearings for wear and replace as necessary.