Viking Pump TSM211: F-G 724/4724 - Manual (Page 6)

SECTION TSM 211 ISSUE D PAGE 6 OF 8
ASSEMBLY
Remove the packing gland nut and seal seat. Inspect the
gaskets and the seal seat for wear. If the seal is to be re-
used, remove the rotating part of the mechanical seal as
follows: Remove the head and idler. Push the rotor and
shaft out until the outer end of the seal is approximately
flush with the first undercut on the shaft. Then draw rotor
shaft back into the casing and re-install head and idler on
the casing as shown in figure 6. This has positioned the
rotary member beyond the casing. Now place the wire
spanner wrench (Provided in the instruction envelope)
under the rotary member as shown in figure 6. Place
the seal seat on the rotary member and push downward
firmly. In this position install two installation clips on
rotary member (Provided in instruction envelope) 180º
apart before removing the rotary member of the seal.
The installation clips remove the load within the seal and
permits easier disassembly and re-assembly of the seal.
Again remove the head and idler permitting the rotor and
shaft to be removed.
8. To remove the thrust bearing parts, figure 7, first loosen
the setscrew which locks the end cap. Next remove
the end cap allowing ball bearing and conical spring
washers to be removed. The bearings should be washed
thoroughly and examined. If there is any evidence of
wear or damage a new bearing should be used.
9. The casing should be examined for wear, particularly at
the I.D. between the port openings.
10. The casing bushing should be inspected and if it shows
signs of wear, should be replaced.
Examine the lipseals in the bracket and end cap. These
lipseals are important to this assembly and should be
replaced if not in first-class condition. They are a grease seal
for the ball bearing and also act as a shield to keep dirt or
debris from entering the bearing.
When installing new lipseals, be sure they are assembled
with the lips facing as shown in figure 7.
If it is necessary to install a new carbon graphite bushing,
extreme care should be taken to prevent breaking, as it is a
brittle material and easily cracked. If cracked, this bushing will
quickly disintegrate. An arbor press should always be used in
installing carbon graphite bushings. Be sure the bushing is
started straight. DO NOT STOP the pressing operation until
the bushing is in proper position. Starting and stopping this
operation may result in cracking.
1. Install the rotor and shaft. Be sure shaft is free from burrs
and foreign particles that might damage the bracket
bushing.
2. Place a head gasket on the head. With the idler on the
idler pin, put the head and idler on the pump and tighten
the capscrews evenly. 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. This will help in putting the
head on the pump.
fIgURE 6
fIgURE 7
THRUST BEARINg AREA CROSS SECTION
END CAP
LOCKNUT
BEARINg
SPACERS (2)
SETSCREW
DOUBLE ROW
BALL BEARINg
CONICAL
SPRINg
WASHERS (2)
LIPSEALS (2)
SET SCREWS
SEAL SEAT
CLIPS
ROTARY
MEMBER
SPANNER
WRENCH