Viking Pump TSM151.1: H-LL 123/4123 - Manual (Page 10)

SECTION TSM 151.1 ISSUE C PAGE 10 OF 13
ASSEMBLY
Optional Mechanical Seal
(Teflon Fitted Type)
The seal type shown in Figures 11, 12 and 13 can be
installed as an alternate to the standard mechanical seal
(synthetic rubber bellows type). These seals are setscrew
driven and the stationary seats have anti-rotation pins, which
mate with slots in the end of the bracket bushing.
1. Install bracket bushing. If bracket bushing has a
lubrication groove, install bushing with groove at 6:00
o’clock position in bracket. If carbon graphite, Refer to
Installation of Carbon Graphite Bushings, page 11.
2. Install lip seal in bracket.
3. Clean rotor hub and bracket seal housing bore. Refer
to Figure 11. Make sure both are free from dirt and
grit. Coat outer diameter of seal seat gasket and inner
diameter of seal housing bore with non-detergent SAE
30-weight oil.
6. Place tapered installation sleeve (furnished with H, HL,
K, KK, LQ and LL size replacement mechanical seals)
on shaft. Refer to Figure 12. Coat inner diameter of
seal rotary member, tapered installation sleeve and the
shaft with a generous quantity on non-detergent SAE 30
weight oil. Place rotary member on shaft over sleeve
and against hub of rotor. Refer to Figure 13.
FIGURE 12
BRACKET SEAL HOUSING BORE WITH SEAL SEAT
INSTALLED. NOTE SPECIAL INSTALLATION TOOL USED FOR
FACTORY ASSEMBLY.
FIGURE 11
4. Start seal seat in seal housing bore. Make sure seat
anti-rotation pins are aligned to engage slots in end of
bracket bushing. Refer to Figure 11.
5. Using a cardboard disc to protect lapped face of seal
seat, press seal seat assembly to bottom of seal
housing bore using a piece of wood. An arbor press
can also be used to install the seal seat. Seal seat must
be started square and carefully pressed to bottom of
seal housing bore.
K size pumps require a 0.25-inch spacer between seal
and rotor hub to properly position seal on shaft.
FIGURE 13
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. Tighten all drive
setscrews securely to shaft.
AT THIS POINT, FINISH ASSEMBLY PROCEDURES
STARTING AT STEP 9, PAGE 9 (STANDARD
MECHANICAL SEAL).
ANTI-ROTATION PINS ALIGNED
WITH SLOTS IN BUSHING
INSTALLATION TOOL
COAT WITH LIGHT OIL
BEFORE ASSEMBLY
.25 inch thick spacer collar
used here on “K” size pump.
MECHANICAL SEAL
ROTARY MEMBER
ROTOR HUB
SHAFT
TAPERED INSTALLATION SLEEVE
MECHANICAL SEAL
ROTARY MEMBER
SHAFT