Manual

ManualsBrandsViking Pump ManualsPumpsTSM141.2: LS-M 125/4125

SECTION TSM 141.2

PAGE 1 Of 12

ISSUE f

VIKING PUMP, INC. • A Unit of IDEX Corporation • Cedar Falls, IA 50613 USA

TECHNICAL SERVICE MANUAL

CONTENTS

INTRODUCTION

The illustrations used in this manual are for identification

purposes only and cannot be used for ordering parts. Obtain a

parts list from the factory or a Viking® representative. Always

give complete name of part, part number and material with

model number and serial number of pump when ordering

repair parts. The unmounted pump or pump unit model

number and serial number are on the nameplate.

In the Viking model number system, basic size letters are

combined with series number (125 and 4125) and used to

indicate either an unmounted pump or mounted pump unit.

FIGURE 1

Size LS

Introduction . . . . . . . . . . . . . . . . . . . . . . . 1

Special Information . . . . . . . . . . . . . . . . . . . 2

Maintenance . . . . . . . . . . . . . . . . . . . . . . 2

Packed Pumps . . . . . . . . . . . . . . . . . . . . . 3

Mechanical Seal Pumps . . . . . . . . . . . . . . . . 6

Standard Rubber Bellows Type . . . . . . . . . . . 8

Optional PTFE Seal . . . . . . . . . . . . . . . . . 9

Thrust Bearing Adjustment . . . . . . . . . . . . . . .10

Installation of Carbon Graphite Bushings . . . . . . . .11

Pressure Relief Valve Instructions . . . . . . . . . . 11

FIGURE 2

Sizes Q and M

FIGURE 3

Size QS

UNMOUNTED PUMP UNITS

PACKED MECH. SEAL

LS125 LS4125

Units are designated by the

unmounted pump model

numbers followed by a

letter indicating drive style.

V = V-belt

D = Direct Connected

R = Viking Speed Reducer

P = Commercial Speed

Reducer

Q125 Q4125

QS125 QS4125

M125 M4125

This manual deals only with Series 125 and 4125 Heavy

Duty Bracket Mounted Pumps. Refer to Figures 1 through

15 for general configuration and nomenclature used in this

manual. Pump specifications and recommendations are

listed in Catalog Section 141, Series 125 and 4125 Heavy

Duty Bracket Mounted Pumps.

Electronic copies of the most current TSM issue can be found on the Viking Pump website at www.vikingpump.com

HEAVY-DUTY BRACKET MOUNTED PUMPS

SERIES 125 AND 4125

SIZES LS, Q, QS, M

Summary of content (12 pages)

PAGE 1
Electronic copies of the most current TSM issue can be found on the Viking Pump website at www.vikingpump.com TECHNICAL SERVICE MANUAL HEAVY-DUTY BRACKET MOUNTED PUMPS SERIES 125 AND 4125 SIZES LS, Q, QS, M SECTION TSM 141.2 PAGE 1 of 12 ISSUE F CONTENTS Introduction . . . . . . . . . . . . . . . . . . . . . . . .1 Special Information . . . . . . . . . . . . . . . . . . . .2 Maintenance . . . . . . . . . . . . . . . . . . . . . . .
PAGE 2
SPECIAL INFORMATION DANGER ! Before opening any Viking pump liquid chamber (pumping chamber, reservoir, relief valve adjusting cap fitting, 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.
PAGE 3
PACKED PUMPS IDLER ROTOR HEAD PACKING PACKING GLAND BRACKET SHAFT IDLER PIN CASING FIGURE 4 CUTAWAY VIEW OF PACKED PUMP MODEL Q OR M125 WITH CALLOUTS EXPLODED VIEW OF MODEL LS125 ITEM NAME OF PART ITEM NAME OF PART ITEM NAME OF PART 1 Locknut 14 Packing Retainer Washer 27 Idler Bushing 2 Lockwasher 15 Bracket Bushing 28 Head Gasket 3 End Cap (Outer) 16 Grease Fitting 29 Idler Pin 4 Lip Seal for End Cap 17 Bracket and Bushing 30 Head and Idler Pin 5 Bearing Spacer Collar
PAGE 4
EXPLODED VIEW FOR MODELSQ, QS AND M125 ITEM 1 NAME OF PART ITEM 13 Locknut NAME OF PART ITEM 25 Bracket Bushing NAME OF PART Idler Bushing 2 Lockwasher 14 Bracket and Bushing 26 Head Gasket 3 End Cap (Outer) 15 Grease Fitting 27 Idler Pin 4 Lip Seal for End Cap 16 Capscrew for Bracket 28 Head and Idler Pin 5 Bearing Spacer Collar 17 Bracket Gasket 29 Stud for Head 6 Ball Bearing 18 Nut for Flanges 30 Nut for Head 7 End Cap (Inner) 19 Stud for Flanges 31 Relief Valv
PAGE 5
GREASE FITTING LOCATION NYLON INSERT SETSCREWS INNER END CAP OUTER END CAP HALF ROUND RINGS LOCKWASHER LOCKNUT INNER SPACER COLLAR SHAFT OUTER SPACER COLLAR INNER LIP SEAL OUTER LIP SEAL BALL BEARING BRACKET FIGURE 5 9. Remove packing and packing retainer washer. 3. Place packing retainer washer in bottom of packing chamber and pack pump with new packing. Use packing suitable for liquid being pumped. Install packing, staggering the joints from one side of shaft to other.
PAGE 6
If pump is equipped with jacketed head plate, install at this time along with new gasket. 9. Pack ball bearing with multi-purpose grease, NLGI #2. Place on shaft and push or gently drive in place in bracket. Tighten head capscrews evenly. If pump was equipped with a relief valve and it was removed during disassembly, install on head with new gaskets. Relief valve adjusting screw cap must always point toward suction port. Refer to Figures 1, 2 and 3 on page 1.
PAGE 7
EXPLODED VIEW for MODELs q, qs and m125 ITEM 1 2 3 4 5 6 7 8 9 10 11 12 NAME OF PART Locknut Lockwasher End Cap (Outer) Lip Seal for End Cap Bearing Spacer Collar Ball Bearing End Cap (Inner) Nut for Seal Holder Capscrew for Seal Holder Seal Holder Plate Seal Holder Mechanical Seal ITEM 13 14 15 16 17 18 19 20 21 22 23 24 NAME OF PART ITEM Set Collars Pipe Plug Grease Fitting Bracket and Bushing Capscrew for Bracket Bracket Bushing Bracket Gasket Stud for Flanges Nut for Flanges Casing (QS size has opp
PAGE 8
seal access hole (for setscrews) spring adapter mechanical seal (Rotary member) seal seat gasket seal holder right side of pump seal holder plate set collar ASSEMBLY Standard Mechanical Seal (Synthetic Rubber Bellows Type) The seal used in this pump is simple to install and good performance will result if care is taken during installation. The principle of the mechanical seal is contact between the rotary and stationary members.
PAGE 9
Place pair of half round rings on shaft and slide inner bearing spacer collar over half round rings to lock them in place. There is no pair of half round rings on Q, QS and M size pumps. Refer to Figure 7, page 8. right side of pump seal access hole (for setscrews) spring adapter mechanical seal (Rotary member) seal seat gasket seal holder seal holder plate set collar seal seat FIGURE 8 - standard mechanical seal spring mechanical seal (rotary member) 9.
PAGE 10
A tapered sleeve is available, at extra cost, for Q, QS and M pumps from Viking Pump 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 11. seal access hole (for setscrews) THRUST BEARING ADJUSTMENT Refer to Figure 13 1. Loosen two setscrews over each outer and inner end caps. 2.
PAGE 11
INSTALLATION OF CARBON GRAPHITE BUSHINGS When installing carbon graphite bushings, extreme care must be taken to prevent breaking. Carbon graphite is a brittle material and easily cracked. If cracked, the bushing will quickly disintegrate. Using a lubricant and adding a chamfer on the bushing and the mating part will help in installation. The additional precautions listed below must be followed for proper installation: 1. A press must be used for installation. 2. Be certain bushing is started straight.
PAGE 12
TECHNICAL SERVICE MANUAL HEAVY-DUTY BRACKET MOUNTED PUMPS SERIES 125 AND 4125 SIZES LS, Q, QS, M SECTION TSM 141.2 PAGE 12 of 12 ISSUE F DISASSEMBLY Mark valve and head before disassembly to insure proper reassembly. 1. Remove valve cap. 2. Measure and record length of extension of adjusting screw. Refer to “A” on Figures 14 and 15. 3. Loosen locknut and back out adjusting screw until spring pressure is released. 4. Remove bonnet, spring guide, spring and poppet from valve body.