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TECHNICAL SERVICE MANUAL
VIKING PUMP, INC. • A Unit of IDEX Corporation • Cedar Falls, IA 50613 USA
SECTION TSM
PAGE
ISSUE
Introduction ................................................................... 1
Special Information ....................................................... 3
Maintenance ................................................................. 4
Parts Identification Drawings ........................................ 5-7
Disassembly of Pump ................................................... 7
Disassembly of Coupling .............................................. 8
Disassembly / Assembly Bearing Carrier ..................... 9-10
Installation of Bushings................................................. 10
Assembly of Pump........................................................ 10-11
Pump Rotation .............................................................. 11
Assembly of Couplings ................................................. 12
Adjusting End Clearance .............................................. 13
Pressure Relief Valve Instructions ................................ 13-14
Troubleshooting ............................................................ 15
Warranty ....................................................................... 16
CONTENTS
INTRODUCTION
685.2
1 OF 16
C
WARNING!
Persons with surgical implants of a metallic
or electronic nature should avoid working on
pump – especially the inner magnet assem-
bly.
This information must be read fully before
beginning any maintenance or repair of the
pump. All maintenance or repair must be done
by SUITABLY TRAINED or qualified persons
only.
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 the complete name of the part, part number and
material with the model number and serial number of the
pump when ordering repair parts. The unmounted pump or
pump unit model number and serial number can be found on
the nameplate secured to the pump.
This manual deals only with Series 855 magnetic drive pumps.
Refer to Figures 1 through 22 for general configuration and
nomenclature used in this manual. Pump specifications and
recommendations are listed in Catalog Section 685.
In the Viking model number system, the basic size letters
(AS, AK, AE etc.) are combined with the series number (855)
indicating basic pump construction material.
MODEL NUMBER CHART
Pump with Bearing Carrier
FIGURE 2
AK SERIES 855UB MD2-14 M
Pump with Motor Directly Mounted to the Bracket
UNMOUNTED PUMPS UNITS
AS-855U, AS-855M,
Units are designated by the un-
mounted pump model numbers
followed by the magnetic coupling
size and a letter indicating drive
style.
(Example: AK-855MA MD2 B50 M )
D = Direct Drive, Base Mounted
M = Motor, Face Mounted
B = Bearing Carrier
R = Viking Reducer Drive
P = Commercial Reducer Drive
See Page 4 for complete description of
the model number
AK-855U, AK-855M
AL-855U, AL-855M
KE-855U, KE-855M
KKE-855U, KKE855M
TABLE 1
FIGURE 1
SERIES AK855UB MD2-32 B
SERIES 855
Sizes AS, AK, AL, KE, KKE