108-A00: Page 8/12
MAINTENANCE
VANE REPLACEMENT
1. Drain the pump and system, as required.
Drain plugs (73A) are located at the base of the cylinder of
SMVP Models.
2. For replacement of the vanes ONLY, remove the outboard
head, following steps 10 and 11 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, 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 2 and 3 until all vanes have been replaced.
6. To reassemble, follow steps 2 through 7 in the "Pump
Assembly" section of this manual.
ROUNDED EDGE OUT
RELIEF GROOVES
FACE IN DIRECTION
OF ROTATION
Figure 4 - Vane Installation
PUMP DISASSEMBLY
NOTICE:
The magnet housing (57) should remain mounted to its
base during pump disassembly. If removed, the magnet
housing (57) must be secured before pump disassembly.
1. Drain the pump and system, as required.
Drain plugs (73A) are located at the base of the cylinder of
SMVP Models.
2. Disconnect the piping from the pump intake and discharge
connections.
3. Remove the four magnet housing/head capscrews (54A)
NOTICE:
Be prepared for strong magnetic attraction between the
inner and outer magnets, forcibly pulling the pump
assembly inward.
4. While facing the outboard end of the pump, grasp the
pump cylinder (12) with two hands and firmly pull the
pump assembly from the magnet housing.
5. Remove the containment can (50) from the inboard head,
using a slight pry, if necessary. DO NOT damage the
containment can or pump head. Remove and discard the
containment can O-ring (51).
Failure to use care when handling
magnets can cause personal injury
Strong magnetic
field can cause
personal injury
6. With properly sized snap ring pliers, remove the snap ring
(83) from the shaft end. Pull the inner magnet (52) from
the shaft. Remove the shaft key (35).
7. Remove the four socket head capscrews (21) from the
inboard head and bearing assembly (20). Carefully slide
the inboard head assembly off the shaft. A pry may be
necessary to separate the head and cylinder. DO NOT
damage head, cylinder / casing or shaft.
8. Remove the disc (71) and head seal ring / O-ring (72) from
the cylinder / casing. Discard the head seal ring / O-ring.
9. Carefully pull the rotor and shaft assembly (13) from the
cylinder while preventing the vanes (14) and push rods
(77) from falling out of the rotor. Set the rotor and shaft
assembly aside for future vane replacement and
reassembly.
10. Remove the four bearing cover capscrews (28) and the
bearing cover (27). Remove and discard the bearing cover
seal ring (26).
11. Remove the four outboard head capscrews (21 A) and the
outboard head and bearing assembly (23). Remove the
disc (71) and head seal ring / O-ring (72). Discard the
head seal ring / O-ring. Use care not to let the disc fall
and become damaged.
12.
RELIEF VALVE DISASSEMBLY (if equipped)
a. Remove the valve cap (1) turn the adjusting screw (2)
to relieve the spring pressure.
b. Remove the relief cover capscrews (5) and relief
valve cover (4)
c.
Remove the spring guide (7), spring (8), and valve (9)
from the relief valve bore.