Viking Pump TSM845.1: LQ-QS 825, 823, 827 - Manual (Page 11)

SECTION TSM 845 1 ISSUE E PAGE 11 OF 13
2. Place a spacer under pump so the foot sits flat and clamp
foot to the table Install one of the secondary O-Ring
seals onto the pump pilot then slide the coupling bracket
up to pump and bolt together
3. Install two threaded rods into the bracket on the other
end Insert the (2) jackscrews into their holes of the
bearing housing and thread in completely Install other
secondary O-ring onto the bearing housing pilot Support
the bearing housing assembly from over head then slide
onto the (2) threaded rods Balance the assembly and
glide outer magnet onto canister until jackscrews come
to rest in the two counter bored holes on the bracket BE
CAREFUL TO CENTER THE OUTER MAGNET WHILE
STARTING TO ENGAGE CANISTER. Depending
on lengths of magnets the unit may be drawn in as the
jackscrews are removed or may require pushing in
Evenly back off the jack screws until the housing is
approximately 1” from the bracket then remove the over
head support and finish backing off the jack screws The
housing may require a slight lift to get into the pilot of the
bracket Secure with (2) capscrews then remove the rods
and install final (2) capscrews
ASSEMBLY: D SERIES COUPLING
1. Remove any foreign material attached to the magnets
Place key in pump shaft and slide inner magnet on shaft
until it comes to rest against shoulder on shaft Insert
washer, lockwasher and capscrew into end of magnet
and tighten May require inserting brass bar into port to
block rotor from turning Install O-ring into face of pump
bracket then slide canister over inner magnet and secure
with the capscrews
DANGER !
follow these directions exactly to avoid
injury to self or damage to pumping unit,
be extremely careful to keep inner & outer
magnets at least (1) foot apart until step
3. Do not allow magnets to engage in any
other fashion. Be aware of health hazards
listed on (page 2).
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.
TROUBLESHOOTING
Some of the following may help pinpoint the problem:
Pump does not pump:
• Pump has lost its prime from air leak or low level in tank.
• Suction lift is too high
• Pump is rotating in the wrong direction
• Suction and/or discharge valves not open.
• The strainer may be clogged.
• The bypass valve is open, the pressure relief valve is set
too low or the pressure relief valve poppet stuck open
• Improper end clearance
• The pump is worn out.
• Are there any changes in liquid, system or operation that
would influence pump or coupling performance, e g new
liquid, additional lines or process changes?
• Temperature changes either in the liquid or the
environment
• The magnetic coupling is decoupling. Changes in
application (temperature, pressure, viscosity, etc ) may
require torque beyond coupling capabilities
Pump starts, then loses its prime:
• The supply tank is empty
• Liquid vaporizing in the suction line
• An air leak or air pocket in the suction line.
Pump is noisy:
• Pump is being starved (heavy liquid cannot get to pump
fast enough) Increase suction pipe size, reduce its length
or slow down the pump
• Pump is cavitating (liquid vaporizing in suction line).
Increase suction pipe size or reduce its length
• Check alignment.
• The magnetic coupling has decoupled. Shut off and restart.
Pump is not delivering up to capacity:
• The pump is starving or cavitating – increase suction pipe
size or reduce length or reduce pump speed
• The strainer is partially clogged.
• An air leak somewhere in suction line.
• The pump may be running too slow. Is motor the correct
speed and wired up correctly?
• The pressure relief valve is set too low, stuck open or has
a damaged poppet or seat
• The bypass line around the pump is partially open.
• The pump is worn out or has too many gaskets.
Pump takes too much power (stalls motor):
• The liquid is more viscous than the unit is sized to handle.
• The system pressure relief valve is set too high.
• The coupling is misaligned.
• The bushings have frozen up or the liquid has set up in
the coupling