Viking Pump TSM141.1: G-LL 125/4125 - Manual (Page 11)

SECTION TSM 141.1 ISSUE E PAGE 11 OF 16
5. Using a cardboard disc to protect the lapped face of the
seal seat, press the seal seat assembly to the bottom of
the seal housing bore using a piece of wood. An arbor
press can also be used to install the seal seat. The seal
seat must be started square and carefully pressed to the
bottom of the seal housing bore.
K size pumps require a 0.25 inch spacer between the
seal and the rotor hub to properly position the seal on
the shaft.
6. Place the tapered installation sleeve (furnished with H,
HL, K, KK, L, LQ and LL size replacement mechanical
seals) on the shaft. Refer to Figure 13. Coat the inner
diameter of the seal rotary member, tapered installation
sleeve and the shaft with a generous quantity of non-
detergent SAE 30 weight oil. Place the rotary member
on the shaft over the sleeve and against the hub of
the rotor. Refer to Figure 14.
Some PTFE seals are equipped with holding clips which
compress the seal springs. Remove the holding clips to
release the springs after the seal is installed on the shaft.
Tighten all drive setscrews securely to the shaft.
AT THIS POINT, FINISH ASSEMBLY PROCEDURES
STARTINg AT STEP 9, PAgE 10 (STANDARD
MECHANICAL SEAL).
FIgURE 13
FIgURE 14
TAPERED INSTALLATION SLEEVE
SHAFT
MECHANICAL SEAL
ROTARY MEMBER
ROTOR HUB
MECHANICAL SEAL
ROTARY MEMBER
SHAFT
0.25 INCH THICK SPACER COLLAR
USED HERE ON “K” SIZE PUMP.
EXPLODED VIEW OF MODELS AK4125 AND AL4125 (MODEL AK4125 SHOWN)
ITEM NAME OF PART ITEM NAME OF PART ITEM NAME OF PART
1 Locknut 12 Seal Plate 23 Pipe Plug
2 Lockwasher (Not G) 13 Seal Holder 24 Rotor and Shaft Assembly
3 End Cap (Outer) 14 Mechanical Seal 25 Idler and Bushing Assembly
4 Lip Seal for End Cap 15 Set Collar with Setscrews 26 Idler Bushing
5 Bearing Spacer Collar (Outer) 16 Pipe Plug 27 Head Gasket
6 Ball Bearing 17 Grease Fitting 28 Idler Pin
7 Bearing Spacer Collar (Inner) 18 Bracket and Bushing Assembly 29 Head and Idler Pin Assembly
8 Ring, Half Round 19 Capscrews for Bracket 30 Capscrews for Head
9 End Cap (Inner) 20 Bracket Bushing 31 Relief Valve Gaskets
10 Seal Holder Nut 21 Bracket Gasket 32 Capscrews for Relief Valve
11 Seal Holder Capscrew 22 Casing 33 Internal Relief Valve