Service manual

ManualsBrandsViking ManualsPower Pump827

MAGNETIC DRIVE PUMPS

SERIES 823 - STEEL

825 - CAST IRON

827 - STAINLESS STEEL

SIZES LQ, LS, Q & QS

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

SECTION TSM 845.1

PAGE 1 OF 13

ISSUE C

TECHNICAL SERVICE MANUAL

CONTENTS

WARNING !

Persons with surgical implants of a

metallic or electronic nature should

avoid working on pump – especially the

inner magnet assembly.

MODEL NUMBER CHART

UNMOUNTED PUMP UNITS

LQ-825, 823, 827

Units are designated by the un-

mounted pump model numbers

followed by the magnetic coupling

size and a letter indicating drive style:

B – Bracket Mount

R – Viking Reducer Drive

P = Commercial Reducer Drive

(Example: LS-827 MD-D140 R)

LS-825, 823, 827

Q-825, 823, 827

QS-825, 823, 827

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

Special Information . . . . . . . . . . . . . . . . . . . 3

Pressure Relief Valves . . . . . . . . . . . . . . . . . 3

Maintenance . . . . . . . . . . . . . . . . . . . . . . 3

Disassembly: Pump. . . . . . . . . . . . . . . . . . . 6

Pump Rotation . . . . . . . . . . . . . . . . . . . . . 7

Port Arrangement . . . . . . . . . . . . . . . . . . . . 7

Disassembly: MD-D Series Coupling . . . . . . . . . . 7

Bearing Housing . . . . . . . . . . . . . . . . . . . . 9

Disassembly of Bearing Housing

. . . . . . . . . . 9

Assembly of Bearing Housing . . . . . . . . . . . .

Installation of Bushings . . . . . . . . . . . . . . . . . 9

Pump Assembly. . . . . . . . . . . . . . . . . . . . .10

Adjusting Head Gasket End Clearance . . . . . . . . 11

Assembly: D Series Coupling . . . . . . . . . . . . . 11

Troubleshooting . . . . . . . . . . . . . . . . . . . . 12

Pressure Relief Valves . . . . . . . . . . . . . . . . 12

Pressure Adjustment

. . . . . . . . . . . . . . . 12

Disassembly: Relief Valve . . . . . . . . . . . . .

Assembly: Relief Valve

. . . . . . . . . . . . . . 13

FIGURE 1

LS-825 MD-D290 R

Complete Unit on Base with Viking “C” Reducer

FIGURE 2

QS-825 MD-D450 B

Bearing Carrier, Footed Pump and Coupling Bracket

Jacketed Pump Bracket

INTRODUCTION

The illustrations used in this manual are for identification

purposes only and should not be used for ordering parts.

Secure a parts list from the factory or a Viking

representative.

Always give the complete name of the part, model and serial

number of the pump when ordering repair parts. The pump

model and serial number can be found on the nameplate

secured to the pump.

In the Viking model number system, the basic size letters are

combined with series number (825, 823, or 827) indicating

basic pump construction material (cast iron, steel or stainless

steel).

This manual deals only with Series 825, 823 and 827 magnetic

drive pumps and couplings. Refer to Figures 1 through

21 for general configurations and nomenclature used in this

manual. Pump specifications and recommendations are listed

in Catalog Section 845.

Summary of content (13 pages)

PAGE 1
TECHNICAL SERVICE MANUAL MAGNETIC DRIVE PUMPS SERIES 823 - STEEL 825 - CAST IRON 827 - STAINLESS STEEL SIZES LQ, LS, Q & QS CONTENTS SECTION TSM 845.1 PAGE of 13 ISSUE C INTRODUCTION Introduction . . . . . . . . . . . . . . . . . . . . . . . . 1 Special Information . . . . . . . . . . . . . . . . . . . . 3 Pressure Relief Valves . . . . . . . . . . . . . . . . . . 3 Maintenance . . . . . . . . . . . . . . . . . . . .
PAGE 2
SAFETY INFORMATION AND INSTRUCTIONS IMPROPER INSTALLATION, OPERATION OR MAINTENANCE OF PUMP MAY CAUSE SERIOUS INJURY OR DEATH AND/OR RESULT IN DAMAGE TO PUMP AND/OR OTHER EQUIPMENT. VIKING’S WARRANTY DOES NOT COVER FAILURE DUE TO IMPROPER INSTALLATION, OPERATION OR MAINTENANCE. THIS INFORMATION MUST BE FULLY READ BEFORE BEGINNING INSTALLATION, OPERATION OR MAINTENANCE OF PUMP AND MUST BE KEPT WITH PUMP. PUMP MUST BE INSTALLED, OPERATED AND MAINTAINED ONLY BY SUITABLY TRAINED AND QUALIFIED PERSONS.
PAGE 3
SPECIAL INFORMATION DANGER ! DISCHARGE 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 4
BRACKET BUSHINGS TEMPERATURE MONITOR (OPTIONAL) BALANCE PLATE CASING HEAD GASKETS CANISTER OUTER MAGNET ASSEMBLY HEAD IDLER PIN PRESSURE RELIEF VALVE CANISTER O-RING BEARING CARRIER ASSEMBLY ROTOR IDLER PUMP BRACKET COUPLING BRACKET INNER MAGNET ASSEMBLY FIGURE 4 CUTAWAY VIEW MAG DRIVE PUMP, MODEL LS-825 MD-D B ILLUSTRATED Series 825, 823, 827 pumps are designed for long, trouble-free service life under a wide variety of application conditions with a minimum of maintenance.
PAGE 5
FIGURE 5 EXPLODED VIEW – LQ & LS SIZE MAG DRIVE PUMPS ITEM 1 2 3 4 5 6 7 8 9 DESCRIPTION Brkt Gasket - Pilot Face Brkt Gasket - Pilot O.D.
PAGE 6
FIGURE 7 EXPLODED VIEW – D SERIES COUPLING ITEM 1 2 3 4 5 6 7 8 DESCRIPTION Locknut Lockwasher Endcap Lip Seals Bearing Spacer, Outer Tapered Roller Bearing, Outer Bearing Spacer, Inner Tapered Roller Bearing, Inner ITEM 9 10 11 12 13 14 15 16 DESCRIPTION Jack Screws Set Screws Insert Capscrews, Bearing Housing Grease Fitting Bearing Housing Gasket, Bearing Housing Key ITEM 17 18 19 20 21 22 23 24 DESCRIPTION Outer Magnet Assembly Bracket Temperature Monitor (Optional) Pipe Plug Capscrews for Canister
PAGE 7
Before further disassembly of the pump can occur, the pump must be separated from the coupling. Refer to DISASSEMBLY: MD-D SERIES COUPLING on page 7 before proceeding with step 6. 6. 7. After the inner magnet is removed from pump shaft, remove the external snap ring from pump shaft (LQ & LS only). The rotor and shaft may now be removed by tapping on the end of shaft with a soft face hammer or, if using a regular hammer, use a piece of hardwood between the shaft and hammer.
PAGE 8
3. Set the outer assembly with magnets down on a clean, flat surface (preferably not steel) to keep from rolling around. Remove temperature probe (if present). 4. To facilitate disassembly, it may be necessary to slide a block of wood under the pump casing or clamp pump foot as shown, since the pump alone will not balance on foot. See Figure 11. Remove the (4) 0.50” capscrews securing the pump to the coupling bracket.
PAGE 9
BEARING HOUSING The bearing housing features two grease packed tapered roller bearings (TRB) along with a one-piece outer magnet assembly with shaft. The unit may be greased externally using the grease fitting. See Figure 15 if further assembly is required and proceed as follows: 1. Cover the open end of the outer magnet with a piece of sheet metal. This will keep foreign material out of magnet area and protect the magnets. Set the assembly face down with the shaft pointing up and remove jackscrews. 2.
PAGE 10
PUMP ASSEMBLY Use a lubricant compatible with the fluid being handled when reassembling the pump. Inspect all parts, replacing any worn parts. Polish out any nicks or burrs and clean all parts thoroughly. Make sure drilled holes in rotor, shaft, orifice, balance plate and bracket are clear. Plugged areas will cause heat buildup and destroy the magnets. Also check the drilled passageways in the head and idler pin to be sure they are clear. 1.
PAGE 11
ADJUSTING HEAD GASKET END CLEARANCE ASSEMBLY: D SERIES COUPLING 1. Use either of the following procedures to properly adjust the end clearance, when replacing gaskets. PROCEDURE A: With the casing secured to the bracket and balance plate in position, slide the rotor and shaft into the casing. Insert the feeler gage of the proper thickness into the port and between two rotor teeth. Install one .015” and .007” gasket onto the head. With the idler on idler pin, place head into the pump casing.
PAGE 12
TROUBLESHOOTING PRESSURE RELIEF VALVES Some of the following may help pinpoint the problem: PRESSURE ADJUSTMENT Pump does not pump: • • • • • • • • • • • Pump has lost its prime from air leak or low level in tank. Suction lift is too high Pump is rotating in the wrong direction Suction and/or discharge valves not open. The strainer may be clogged. The bypass valve is open, the pressure relief valve is set too low or the pressure relief valve poppet stuck open.
PAGE 13
TECHNICAL SERVICE MANUAL SECTION TSM 845.1 PAGE 13 of 13 ISSUE C DISASSEMBLY: RELIEF VALVE 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.