Viking Pump TSM151.2: LS-M 123/4123 - Manual (Page 11)

SECTION TSM 151.2 ISSUE B PAGE 11 OF 14
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.
ASSEMBLY
Optional Mechanical Seal
(Teflon Fitted Type)
The seal type shown in Figure 9 can be installed as an
alternative to the standard mechanical seal (synthetic rubber
bellows type). This seal is setscrew driven, is simple to
install and good performance will result if care is taken
during installation.
Clean rotor shaft and seal housing bore. Make sure they are
free of dirt, grit and scratches. Gently radius leading edge of
shaft diameter over which seal is to be placed.
A tapered sleeve is available, at extra cost, for Q, QS and M
pumps from Viking Pump Division for seal installation on
shaft. LS size pump shaft is tapered and installation sleeve
is not available. Place tapered sleeve on shaft, refer to
Figure 10.
Never touch sealing faces with anything except clean hands
or clean cloth. Minute particles can scratch the seal faces
and cause leakage.
Coat tapered sleeve and inside of the rotary member with a
generous quantity of SAE 30 non-detergent oil. Grease is
not recommended. Start rotary member on shaft and over
tapered sleeve.
Move rotary member so setscrews are directly below seal
access holes on left side of bracket (viewed from shaft end)
Refer to Figure 9. Tighten all setscrews securely to shaft.
Flush sealing faces of both rotary member and seal seat
with oil and install seal seat and seat gasket over end of
shaft against machined bracket face. Assemble other seal
seat gasket, seal holder, seal holder plate capscrews and
nuts and tighten securely. Remove tapered installation
sleeve.
Some Teflon seals are equipped with holding clips, which
compress the seal springs. Remove holding clips to release
springs after seal is installed on shaft.
AT THIS POINT, FINISH ASSEMBLY PROCEDURE
STARTING AT STEP 8, PAGE 10 (STANDARD
MECHANICAL SEAL).
FIGURE 10
FIGURE 9 – OPTIONAL MECHANICAL SEAL
SEAL ACCESS HOLE (FOR SETSCREWS)
SEAL SEAT GASKET SEAL HOLDER
PLATE
SEAL HOLDER
SEAL SEAT
MECHANICAL SEAL
(ROTARY MEMBER)
LEFT SIDE
OF PUMP
TAPERED INSTALLATION SLEEVE
MECHANICAL
SEAL ROTARY SHAFT