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TYPICAL WIRING
SERVICE PARTS
N.O.
C
N.C.
HIGH
N.O.
C
N.C.
LOW
MOTOR
DF755
#1
DF755
#2
Starts at Low Level, Stops at High
Start motor when predetermined low level is reached and stop when high
level is reached. Keeps tank level within selected limits. Motor starter
equipped with H.O.A.
MOTOR
N.O.
C
N.C.
HIGH
N.O.
C
N.C.
LOW
DF755
#1
DF755
#2
Starts at High Level, Stops at Low
Start motor when predetermined high level is reached and stop when low level
is reached. Motor starter equipped with H.O.A.
Single Magneto Shutdown
Wiring of magneto to N.O. switch terminal will shut down engine at prede-
termined high level, shown below. Wire to N.C. terminal to shutdown on
low level.
N.O.
C
N.C.
6 2 3
5
Magneto
Magneto
1 4
Jumper #2 & #5
Model MS2120
Dual Magneto Shutdown
Shutdown dual magneto engines using Murphy MS2120 Magnetic Switch.
Diagram below shows hookup for low level shutdown. Wiring changes and
mounting locations are necessary for high level shutdowns.
DF755
Description Part Number
Cover (aluminum) 15050081
Case (aluminum) 15050082
Cover Screws (3), #6–32 x 5/16 round head 80040607
SPDT snap-switch and movement assembly/repair kit (5 amp) 15000122
Screws (3) for switch assembly to case, #6–32 x 1/4 round head 80040605
Diaphragm repair kit 15000123
Bottom Plate (1 NPT connection) 15050083
Bracket and movement repair kit 15000313
SPDT snap-switch and insulator repair kit (5 amp) 15000121
DF755EX
Cover (aluminum) 15050154
Case (aluminum) 15050155
Gasket 15050305
SPDT snap-switch and movement assembly/repair kit (5 amp) 15000118
Screws (2) for switch assembly to case, #6–32 x 1/4 round head 80040605
Actuator assembly/repair kit 15000119
Diaphragm repair kit 15000123
Bottom Plate (1 NPT connection) 15050083
Screw (1), #8–32 x 1/4 round head 80040814
Terminal cup washer 00000827
Plug 1/8 plastic pipe hex (DF755EX) 86060203
Connector, 1/4 tube x 1/8 pipe male (DF756) 85030402
Plug 1/2 NPT hex (brass) 86060801
SPDT snap-switch and insulator repair kit (5 amp) 15000117
DF757
Cover (aluminum) 15050081
Case (aluminum) 15050594
Cover Screw (3), #6–32 x 5/16 round head 80040607
SPDT snap-switch and bracket assembly/repair kit (5 amp) 15000174
Screws (2) for switch bracket and assembly to case (#6–32 x 1/4 round head) 80040605
Spring and piston assembly/repair kit 15000190
Diaphragm repair kit 15000123
Bottom Plate (1 NPT connection) 15050083
SPDT snap-switch and insulator repair kit (5 amp) 15000230
MAGNETO
N.O.
C
N.C.
CONTROL SYSTEMS & SERVICES DIVISION
P.O. Box 1819; Rosenberg, Texas 77471; USA
+1 281 633 4500 fax+1 281 633 4588
e-mail sales@fwmurphy.com
MURPHY DE MEXICO, S.A. DE C.V.
Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje
San Luis Potosí, S.L.P.; México 78384
+52 444 8206264 fax +52 444 8206336
Villahermosa Office +52 993 3162117
e-mail ventas@murphymex.com.mx
www.murphymex.com.mx
FRANK W. MURPHY, LTD.
Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.
+44 1722 410055 fax +44 1722 410088
e-mail sales@fwmurphy.co.uk
www.fwmurphy.co.uk
MURPHY SWITCH OF CALIFORNIA
41343 12th Street West
Palmdale, California 93551-1442; USA
+1 661 272 4700 fax+1 661 947 7570
e-mail sales@murphyswitch.com
www.murphyswitch.com
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.
MACQUARRIE CORPORATION
1620 Hume Highway
Campbellfield, Vic 3061; Australia
+61 3 9358 5555 fax +61 3 9358 5558
e-mail murphy@macquarrie.com.au
FW Murphy
P.O. Box 470248
Tulsa, Oklahoma 74147 USA
+1 918 317 4100
fax +1 918 317 4266
e-mail sales@fwmurphy.com
www.fwmurphy.com
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USA–ISO 9001:2000 FM 28221
UK–ISO 9001:2000 FM 29422
Printed in U.S.A.