Viking Pump TSM430: HL-N 34/434 - Manual (Page 7)

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SECTION TSM 430 ISSUE G PAGE 7 OF 9
6. THRUST WASHERS: Rotor thrust washer and rotor
bearing sleeve thrust washer – used in Q, M and N size
pumps should be removed, examined for excessive
wear and replaced if necessary. These thrust washers
are located on the hub of the rotor and the casing end of
rotor bearing sleeve.
7. If the rotor-bearing sleeve, casing or idler bushing shows
signs of wear it should be replaced. All parts should be
checked for wear before the pump is put together. When
making major repairs, such as replacing a rotor and shaft,
it is usually considered advisable to also install a new
head and idler. When making minor repairs, where only
an idler bushing and idler pin are required, other new
parts are usually not necessary. When all the necessary
parts are available, the pump can be assembled.
PUMP
MODELS
NORMAL
AMOUNT USED
(INCH)
ONE SET OF GASKETS
CONSISTS OF THE
FOLLOWING
HL 34 & 434 .010” - .020” 1 - .005” , 2 - .007”
KK 34 & 434 .015” - .025” 2 - .007” , 1 - .015”
LQ 34 & 434 .025” - .035” 1 - .015” , 2 - .006”
Q, M, N 34 & 434 .020” - .035” 2 - .015” , 1 - .006”
ASSEMBLY
1. Thrust washers used in Q, M and N size pumps should
be assembled on the rotor hub and rotor-bearing sleeve.
Put the plain washer on the two locating pins on the rotor
hub. Put the grooved face washer on the pins on the
rotor-bearing sleeve with the grooved face toward the
rotor.
2. Remove all burrs and rough surfaces from the rotor and
shaft and assemble in the casing. Lubricate the rotor
shaft and bushing with grease and start the shaft through
the rotor bearing sleeve or casing bushing. Slowly turn
the rotor and push it into the casing as far as it will go.
3. Place the head gaskets on the head. The proper amount
of gaskets should be used to provide the necessary
end clearance within the pump so it turns freely with no
appreciable endplay. The Gasket Table ( below gives
the normal amount of gaskets used on each pump.
4. Lubricate the idler pin with lube oil and place the idler
and bushing assembly on the idler pin.
5. The head can now be assembled on the pump. Make
sure it is installed in the correct position See Disassembly
Step 1 (Note), page 6. Tilt the top of the head away
from the pump slightly until the crescent enters the
inside diameter of the rotor and rotate the idler until its
teeth mesh with the rotor teeth. Do not damage the
head gaskets. Tighten the head capscrews or nuts and
then check the end clearance. If the pump shaft cannot
be rotated, more gaskets must be added. If, however,
the pump has any noticeable end play, remove enough
gaskets so the pump has no appreciable end play but
still turns freely.
PACKED PUMPS
6. Pack the pump. It is good practice to install a set of
new packing. The pump should be packed with packing
suitable for the liquid being pumped.
Cut the packing into individual rings that wrap exactly
around the shaft. Install and seat each ring one at a
time, staggering the ring joints from one side of the shaft
to the other. Lubricate the packing rings with oil, grease
or graphite to aid in assembly. A length of pipe or tubing
will help in seating the packing rings.
7. Install the packing gland and nuts. The gland must
enter the stuffing box at least one-eighth of an inch after
tightening the packing gland nuts. Be sure the packing
does not wedge between the stuffing box and the gland,
as this may split the stuffing box.
MECHANICAL SEAL PUMPS
(X-100 & X-200)
6. Make sure the shaft is clean and free of any nicks or
burrs. Lubricate the shaft with lube oil and slide the
mechanical seal in place.
7. Place flat washers and lock washers on the studs then
thread on the retaining nuts. Tighten the nuts evenly
to secure the mechanical seal to the stuffing box face.
Make sure the seal setting clips are in place and tighten
the drive setscrews to the shaft. Leave the setting clips
in place until after the pump is installed on the drive unit.
Be sure and remove the clips before start up.
(PSII SEAL®)
6. Make sure the shaft is clean and free of any nicks or
burrs. Lubricate the shaft with lube oil and slide the
mechanical seal in place.
7. Rotate the seal installation tabs 90 degrees so they
point towards the seal sleeve. Adjust the position of the
seal so the sleeve is evenly spaced between the tabs.
Place flat washers and lock washers on the studs then
thread on the retaining nuts. Tighten the nuts evenly to
secure the seal to the stuffing box face. Tighten the drive
setscrews to the shaft. Using a feeler gage, make sure
there is still an equal space between the sleeve and the
retaining tabs. Readjust if necessary. Leave the seal
installation tabs in position until the pump is installed on
the drive unit and properly aligned. Rotate the tabs 90
degrees before pump start up.
MECHANICAL SEAL NOTES
1. Vent air from stuffing box before start up. The seal may
fail prematurely if this is not done.
2. Preheat seal prior to introducing hot product.
3. Use of low pressure (2 – 4 psi) continuous flow steam
quench on the atmospheric side is recommended.
Failure to use a steam quench could result in premature
seal failure.
4. For double seals, pressurize seal chamber before
startup.
5. Do not start pump until it is fully heated. Mechanical
seal will fail almost instantly if hard product is in the seal
chamber.
6. Do not use the PSII® cartridge lip seal for filled asphalt
or any product containing abrasives.
FIGURE 9
GASKET TABLE