EG21 and EGS21 Series Electric Gage and
SWICHGAGE® Installation
EG21-96048N
Revised 05-05
Section 70
(00-02-0251)
For Pressure, Temperature, Fuel Level, Voltmeter and Ammeter
Patents 5121109, 4975687 and 5608386
CAUTION
Gage Installation
Mounting Clamp (Reversible)
For Thick
For Thin
Panels
Panels
Panel
3/4 in. (19 mm)
maximum thickness
IMPORTANT NOTICE FOR ALL EG21 ELECTRIC GAGES AND EGS21
ELECTRIC SWICHGAGE®S FOR 24VDC AND 32VDC APPLICATIONS
A change in the dial illumination circuit has made it necessary to change the external wiring harness.
If you use the incorrect wiring harness, irreparable damage will occur to the gage mechanism.
The table below lists correct wire harness assemblies for units by manufacturing date. For
date code R1 (January 1996) or earlier (Q12, Q11, etc.) the wire harness can be identified
by P/N and by BLACK shrink tubing on the YELLOW wire. For date code R2 (February 1996)
and later (R3, R4, etc.) the wire harness can be identified by P/N and by RED shrink tubing
on the YELLOW wire.
Date Code R1 or Earlier
05004546
05004547
05004548
05004549
05004550
05004551
05004552
Mounting Hole
2-1/16 in. (52 mm) Diameter
Date Code R2 or Later
05006166
05006167
05006168
05006169
05006170
05006171
05006172
Plug-in
Connector
Push-on Plug
and Wire Leads
Set Point Adjustment
(SWICHGAGE® only)
If dial illumination is NOT required, either wire harness can be used on any date code, if the
YELLOW wire is NOT connected.
Sender Installation
Temperature Sender
Pressure Sender
CAUTION: Do not use sender body to tighten.
If sealant tape or pipe dope is used on the
pressure sender, be sure that the tape or dope
does not plug the sender’s orifice.
Sender
Sender
(Typical)
Adapter
Engine block
pressure port
Copper
Washer
Engine
Block
Fuel Level Sender
CAUTION: Extreme caution must be used in handling or working on or around the fuel tank. It must be worked on only in a
WELL VENTILATED area. Keep all flame and hot materials away from it. Do not smoke while working on or around the tank.
Avoid sliding or dragging the tank, or other actions which may cause a spark.
Mounting Hole Dimensions
Tank Installation
Mounting Plate
(see Mounting Hole Dimensions)
Gasket
72
72
View A
1-1/16 in.
(27 mm)
radius
in.
1/4mm)
(6
Float Arm
Connector
Shaft
1-3/4 in.
(44 mm)
dia.
Float Arm
Connector
See View A
68.5
68.5
at
Flo m
Ar
5/32 in.
(4 mm) dia.
5 Holes
Mounting Plate
2-3/4 in. (70 mm)
diameter
EG21-96048N page 1 of 2
t
Floam
Ar
Shaft
Arm
Basic Wiring
Pressure, Temperature, Fuel Level and Voltmeter Gage
Black
WARNING:
DISCONNECT
BATTERY
NEGATIVE
CABLE BEFORE
WIRING OR
SERVICE.
Yellow*
Black
Red
Ammeter Gage
Light Switch
Yellow*
ON/OFF
Switch
Alternator
Battery
*Yellow wire is optional for gage illumination and
Battery
does not need to be connected for gage to operate.
Sender Wiring
Ungrounded Sender
Grounded Sender
Blue
Dual Gages with Dual Gage Sender
Blue
Blue
Black
Black
Black
Blue
Sending Unit
Sending Unit
Sending Unit
SWICHGAGE® Wiring
WARNING: DISCONNECT BATTERY NEGATIVE CABLE BEFORE WIRING OR SERVICE.
CAUTION: Connecting full Battery potential to the brown wire can damage the SWICHGAGE®. Shutdown circuit is rated for
300 mA continuous, 900 mA inrush. Circuit grounds out at set point.
Black
Brown
Red
Battery
G
NO
NC SW1 SW2
B
ON/OFF
Switch
Red
Fuel Valve
Red
ON/OFF
Switch
*
518APH
Magnetic Switch
Black
OBSERVE ELECTRICAL RATING
CAUTION: Devices containing solid
state components can be damaged or
caused to malfunction when used in systems
which incorporate inductive loads (e.g. relays,
solenoids, etc.) that can generate voltage spikes.
To reduce the potential for this type of damage,
install a flyback or clamping diode across all
inductive loads (see wiring diagram shown right).
Use Murphy diode package 65-00-0343 or
equivalent. A typical diode is 1N4005 which is
readily available from commercial sources. Failures
of this type are not covered by our Limited Warranty.
Brown
Alarm Device or
Shutdown Relay
Black
Orange
Orange
Battery
Diode Package
*Model 518APH is the only Murphy
recommended Tattletale® for use
with the EGS21 series Electric
SWICHGAGE®.
Warranty
A limited warranty on materials and workmanship is given with this FW Murphy product.
A copy of the warranty may be viewed or printed by going to www.fwmurphy.com/support/warranty.htm
FW Murphy
P.O. Box 470248
Tulsa, Oklahoma 74147 USA
+1 918 317 4100 fax +1 918 317 4266
e-mail [email protected]
www.fwmurphy.com
INDUSTRIAL PANEL DIVISION
FRANK W. MURPHY, LTD.
P.O. Box 470248
Tulsa, Oklahoma 74147 USA
+1 918 317 4100 fax +1 918 317 4266
e-mail [email protected]
Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.
+44 1722 410055 fax +44 1722 410088
e-mail [email protected]
www.fwmurphy.co.uk
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 [email protected]
www.murphymex.com.mx
Printed in U.S.A.
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.
EG21-96048N page 2 of 2
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