Viking Pump TSM270.2: RL 16 and 25 High Pressure - Manual (Page 6)

SECTION TSM 270.2 ISSUE A PAGE 6 OF 12 SECTION TSM 270.2 ISSUE A PAGE 7 OF 12
Optional Packing Replacement Only
REMOVAL
1. Remove the packing gland capscrews.
2. If the pump bracket is still assembled, there is enough
room to slide the packing gland back and pull out
the packing with a packing hook, without further
disassembly.
INSTALLATION
1. Follow steps 1 through 4 of ASSEMBLY on page 8.
2. Clean the stuffing box thoroughly and check the shaft for
smoothness. Scored shafts should be replaced.
3. Lubricate the packing rings with an appropriate
lubricant. Install and seat each ring of packing one at
a time, staggering the ring joints 90° apart. Push each
ring in by hand using the packing gland or by tightening
two opposite packing gland capscrews.
4. Install the packing gland washers and capscrews.
Tighten the packing gland until it becomes snug. Do not
over-tighten.
5. On start-up of the pump, carefully tighten the gland
to reduce leakage until a desired leakage rate is
obtained. Excess leakage during the break-in period
is necessary to help lubricate and cool the packing. A
maximum adjustment of approximately 1/8 turn at a time
is recommended. If during this period heating occurs,
back off the gland and allow to run until stuffing box
cools. Then, begin readjustment.
NOTE: Some leakage is required for packing lubrication.
The amount will vary depending on the application. Consult
your authorized Viking representative for more information.
Labyrinth Seal
All labyrinth seals contain 4 common parts:
Stationary Element
Stationary O-ring
Rotating Element
Rotating O-ring
It is recommended to replace any O-rings that are removed
from their initial seat. It is recommended to replace the
entire seal if the stationary and rotating elements become
separated.
FIGURE 5
WARNING:
Do not use the circulation tubing to lift the pump or
casing. Make sure the casing is secured to a work
bench or other stable work surface before working
on the pump.
PUMP DISASSEMBLY
DANGER !
Before opening any Viking pump liquid chamber
(pumping chamber, reservoir, 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.
4. That the timing gearbox to cool before handling
the pump. The oil will become very hot during
normal operation. Allow the timing gearbox oil.
Failure to follow above listed precautionary mea-
sures may result in serious injury or death.
1. Remove the coverplate capscrews and coverplate.
2. Loosen the setscrews and capscrews on the seal
gland. For packing or other seals, refer to the specific
instructions for that option.
NOTE: The loosening of the seal setscrews and gland
capscrew should always be the first step whenever working
on the pump.
3. Drain the oil from the timing gear case by removing the
pipe plug (item 1). Remove the capscrews then carefully
slide the gear case off the driver shaft.
4. Remove the capscrews and shaft guards from the
bracket.
5. Remove the capscrews and head.
6. Straighten out the bearing lockwasher tab on both shafts
(see figure 6). Place a wooden block or brass bar in
between the lobes to block rotation of the shafts. Use
the spanner wrench (Suggested Repair Tools # 5) to
remove the locknut. Remove the wooden block and
insert on the opposite side to restrict movement of the
other shaft. Remove the second locknut. Remove both
of the lockwashers.