Electronic copies of the most current TSM issue can be found on the Viking Pump website at www.vikingpump.com
CONTENTS
Introduction .............................................................................1
Installation ...............................................................................3
Maintenance ............................................................................5
Repair Parts ............................................................................5
Seal Removal ......................................................................6
Seal Installation ...................................................................6
Troubleshooting ......................................................................7
Do's & Don'ts ..........................................................................8
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 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 are on the nameplate.
This
manual
deals
only
External Gear Pumps. Refer to Figures 1 through 5
for general configuration and nomenclature used in this
manual. Contact factory for pump specifications and
recommendations.
MODEL NUMBER SYSTEM
G P - 4 2 5 2 5 - N 0 O
External Gear
Principle
Pump
VIKING PUMP, INC.
TECHNICAL SERVICE MANUAL
with
Series
GP-425
Shaft Seal:
4 = Mechanical
Seal
Gear O.D.:
"25"
•
A Unit of IDEX Corporation
EXTERNAL GEAR PUMPS
SERIES GP-425
MODEL NUMBER CHART
UNMOUNTED PUMP
MECH. SEAL
GP-42525-N0O
GP-42525-N1O
GP-42550-N0O
GP-42550-N1O
GP-42575-N0O
GP-42575-N1O
Pump Size:
25
50
75
Design Series:
N = Cartridge Mech Seal
•
Cedar Falls, IA 50613 USA
SECTION
TSM 340.3
PAGE
1 OF 8
ISSUE
A
UNITS
Units are designated by
the unmounted pump
model numbers followed
by a letter(s) indicating
drive style.
D = Direct Drive
Shaft Rotation:
0 = Clockwise
1 = Counter-Clockwise
Relief Valve:
O = No Relief Valve