Viking Pump TSM445: LVP Vane Pumps - Manual (Page 7)

SECTION TSM 445 ISSUE C PAGE 7 OF 11
DANgER !
Before opening any Viking pump liquid
chamber (pumping chamber, reservoir,
relief valve adjusting cap fitting, etc.)
Be sure:
1. That any pressure in the chamber has
been completely vented through the
suction or discharge lines or other
appropriate openings or connections.
2. That the driving means (motor,
turbine, engine, etc.) has been “locked
out” or made non-operational so that
it cannot be started while work is
being done on pump.
3. That you know what liquid the
pump has been handling and the
precautions necessary to safely
handle the liquid. Obtain a material
safety data sheet (MSDS) for the
liquid to be sure these precautions
are understood.
failure to follow above listed
precautionary measures may result in
serious injury or death.
SPECIAL REQUIREMENTS fOR
REVERSE ROTATION
Viking LVP series vane pumps can be operated in reverse
rotation after the following simple modifications:
1. Remove the relief valve and rotate 180 degrees.
Reinstall the relief valve so the valve cap is pointing to
the suction side of the pump. See page 10 for details on
relief valve assembly/disassembly.
2. Remove the rotor/shaft assembly, taking care not
to damage the mechanical seal or bushings. See
“Disassembly” instructions on page 5. The mechanical
seal will need to come off the shaft in the process.
Inspect the seal for damage. Seal replacement may
be necessary. See “Mechanical Seal Replacement,”
page 8.
3. Remove the plugs (item 30B) in the casing and head and
install them in the opposite side.
4. Remove both discs and reverse so that the hole is lined
up with the suction side of the pump.
5. Re-install the rotor/shaft assembly and pushrods as
described in the “Assembly” section. Install the vanes
in the opposite direction shown in figure 10. The vane
grooves should now be open in the new direction. Ensure
the rounded edge of the vane will contact the casing.
DANgER !
Before starting pump, be sure all drive
equipment guards are in place.
failure to properly mount guards may
result in serious injury or death.
1. Install the casing bushing. If the casing bushing has a
lubrication groove, install the bushing with the groove at
the 12:00 position in bracket. Refer to “Installation of
Bushings,” page 9.
2. Ensure the suckback/flush hole is plugged per figure 7.
3. Ensure the seal access holes are plugged unless they
are being used for an external flush line.
4. Ensure the gauge ports are plugged unless being used
for gauges or external flush lines.
5. Install one carbon disc into casing, being careful to line
up the disc hole with the suction side lubrication holes
per figure 8.
6. Coat the shaft with light oil. Install the pushrods and two
or three vanes into the rotor as shown in figure 9.
7. Install the rotor/shaft assembly into casing. Rotate rotor
by turning the shaft so that one of the remaining open
rotor slots is at the 12:00 position. Install a vane. Rotate
to the remaining open slots and install the remaining
vanes.
8. Ensure the grooves on the vanes are open in the
direction of rotation and the rounded edge of the vanes
are pointed out from the shaft as shown in figure 10.
Turn shaft by hand to ensure the vanes and pushrods
can move freely.
ASSEMBLY
(for Standard Pump Construction, clockwise rotation)
9. Install the head bushing. If the head bushing has a
lubrication groove, install the bushing with the groove
at the 12:00 position. Refer to “Installation of
Bushings,” page 9.
10. Ensure the proper suckback/flush hole is plugged per
figure 11.
11. Install the second disc outside of rotor. Ensure the hole
in disc is on suction side. See figure 8.
12. Install the head O-ring onto the pilot on the head.
13. Install the head onto the casing, being careful to not
pinch the o-ring.
14. Tighten the head capscrews evenly.
15. Install the head coverplate O-ring. Install the head
coverplate and tighten the capscrews evenly.
16. Lubricate and install the mechanical seal. See “Seal
Installation,” page 8.
17. Install the seal gland, tighten the capscrews evenly.