110-A01: Page 8/14
MAINTENANCE
VANE REPLACEMENT
1. Drain the pump and system, as required.
2. For replacement of the vanes ONLY, remove the outboard
head(23) by removing capscrews (21).
3. Turn the power end shaft (53) 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, ensuring that the rounded edge is UP
(facing outward) and that the relief grooves are facing
TOWARDS the direction of rotation. See Figure 4.
5. Repeat steps 3 and 4 until all vanes have been replaced.
6. To reassemble, follow steps 3 through 5 in the "Pump
Assembly" section of this manual.
Figure 4 - Vane Installation
PUMP DISASSEMBLY
NOTICE:
Take care when removing the pump foot screws that the
power end shaft or bearing housing (106) are supported.
The power end shaft will tip down when foot screws are
removed.
1. Drain the pump and system, as required.
2. Disconnect the piping from the pump intake and discharge
connections.
3. Remove the four bearing cover capscrews (28), the
bearing cover (27), and the bearing cover o-ring (26).
Discard o-ring.
4. Set the pump on the outboard head, with the shaft facing
up. See Figure 5. Provide adequate support to eliminate
the possibility of tipping during disassembly/assembly.
Figure 5 – Disassembly Orientation
5. Remove the four bearing housing capscrews (106D).
6. Install four 3/8-16 UNC, 4 inch long, fully threaded screws
into bearing housing jacking holes. See figure 6 for
location.
Figure 6 – Jacking Hole Location
Failure to use care when handling
magnets can cause personal injury
Strong magnetic
field can cause
personal injury
7. Slowly turn jacking screws clockwise to separate bearing
housing (106) from magnet housing (57). Alternate screw
location, while attempting to keep driving magnet
assembly as concentric to containment shell (50) as
possible.
NOTICE:
Be prepared for strong magnetic attraction between the
driving and driven magnet assemblies. Never insert any
part of body between magnet assemblies or between
magnet and bearing housing.
NOTICE:
Follow all hazard warnings and instructions provided in
the “Maintenance” section of this manual.
8. When the jacking screws are fully turned into bearing
housing (106), remove the power end assembly (53,
106A/B/C) by pulling up on the power end shaft. It is
recommended that a hoist be used, the assembly weighs
approximately 46 lbs. Place assembly on a non-magnetic
surface away from other magnetic components.
NOTICE:
The magnet housing may abruptly lift off pump after the
head capscrews are removed. Ensure it is supported
before all screws are removed and that nothing is above it.
9. Loosen inboard head capscrews (21). Remove magnet
housing (57) and containment shell (50), while ensuring
the containment shell (50) and inboard head (20) are not
damaged. Remove and discard containment shell o-ring
(51)
10. Loosen hub capscrew (59) and remove along with washer
(58). See Figure 7 for location of screw and washer.
