APPENDIX (FORMERLY TSM 000)
NOTE:
This Appendix section is for reference only. Not
all pump construction features apply to pumps within this
Technical Service Manual.
GENERAL INSTALLATION NOTES
Before installation is started, a few items of a general nature
should be considered.
1. Location
- always locate the pump as close as possible
to the supply of liquid to be pumped. Locate it below
the liquid supply if at all practical. Viking pumps are self
priming but the better the suction conditions the better the
performance.
2. Accessibility
- the pump should be located where it is
accessible for inspection, maintenance, and repair. For
large pumps, allow room to remove the rotor and shaft
without removing the pump from the base.
3. Port Arrangement
- since the pumps have different port
arrangements depending on the model, port location
should be checked before starting the installation. The
ports may be upright, opposite or at right angles to each
other, see
Figure A1
. The right angle ports are normally
right-hand, see
Figure A2
; some models are available
with left-hand arrangements; still other models are
available with the right angle ports located in any one of
eight positions including right-hand and left-hand.
4. Suction/Discharge
- shaft rotation will determine which
port is suction and which is discharge. A look at
Figure
A3
will show how rotation determines which port is which.
As the pumping elements (gears) come out of mesh, point
“A” on
Figure A3
, liquid is drawn into the suction port.
Then at point “B” the gears come into mesh, and the liquid
is forced out the discharge port. Reversing the rotation
reverses the flow through the pump. When determining
shaft rotation, always look from the shaft end of the pump.
Unless otherwise specified, rotation is assumed to be
clockwise (CW), which makes the suction port on the right
side of the pump. The idler pin, which is offset in the pump
head, should be properly positioned toward and an equal
distance between the port connections. See
Figure A3
for
correct idler pin location in relation to pump ports.
FIGURE A1
FIGURE A2
Left-Hand
Pump
Right-Hand
Pump
FIGURE A3
Discharge
Idler Pin
Suction
A
B
FIGURE A4:
CUTAWAY OF VIKING INTERNAL
PRESSURE RELIEF VALVE
Cap
Spring (a)
Valve Body (c)
Poppet (b)
Liquid Outlet
Liquid Inlet
Point (e)
Adjusting Screw (d)
(Should Always
Point Toward
Suction Port)
FIGURE A5-A:
INTERNAL PRESSURE RELIEF VALVE
Discharge
Suction
Pump Head
Relief Valve Adjusting Screw
Cap (Should Always Point
Toward Suction Port)
TSM 1741 | Issue B | Page 11 of 20
© 2019 Viking Pump, Inc. • Cedar Falls, IA
© Viking Pump, Inc.
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