L-5937B page 1 of 2
For Small Engines and Pumps
■
See Oil Level and Condition
Without Shutting Down
■
Shutdown or Alarm on Low Lube Level
■
Adjustable Limit Switch for Alarm
and/or Shutdown
■
Save on Reduced Downtime
and Repair Costs
■
Simple Installation
Description
These float actuated Oil Level Swichgage instru-
ments are a combination oil level sight gage and
adjustable, low and/or high limit switch. The
limit switches are normally open during opera-
tion–yet close if the level drops or rises to where
the float contacts the limit screw. The contact
completes a circuit to ground a magneto or trip a
Murphy magnetic switch. The magnetic switch
can be used to activate alarms and/or shutdown.
Models are also available without limit switches.
Application
The level instruments described above can be
used on a variety of crankcases, pump gearcases,
or oil reservoirs–primarily on small engines and
pumps. The following list displays the model
and its typical application:
L100
†
: Small engines and pumps with
non-vented crankcase.
L100W
†
: Small engines and pumps with
vented crankcase.
L120
†
: Machined surface on crankcase such as
Witte, National-Oilwell/Garland.
L127
: Machined surface on crankcase, specifi-
cally, Fairbanks-Morse ZC Series and
Bell Engines.
L128
: Machined surface on crankcase, specifical-
ly, Arrow and Continental Emsco/Climax.
Specifications
■
Maximum Pressure Rating (all models):
30 psi (207 kPa) [2.07 bar]
■
L100 and L100W
Case:
Die cast aluminum
Float:
Brass
Rating:
2 A @ 30 VAC/DC
Vent Fitting:
1
/
4
in. (6 mm) tube x
1
/
8
NPT
Inlet Fitting:
Hex Nipple
1
/
4
NPT
Hardware (shipped loose)
L100:
• Copper Tubing:
1
/
4
x 48 in. dia.
(6 mm x 1.2 m)
• Reducer Bushing:
1
/
2
NPT x
1
/
4
NPT
• Close Nipple:
1
/
2
NPT
• Tee:
1
/
2
NPT, black pipe
• Wire:
16 AWG x 24 in. (1.5 mm
2
x 610
mm)
L100W:
• Vent Tube:
1
/
4
x 3-
3
/
8
in. (6 x 86 mm)
• Reducer Bushing:
3
/
4
NPT x
1
/
4
NPT
• Close Nipple:
3
/
4
NPT
• Tee:
3
/
4
NPT, black pipe
• Wire:
16 AWG x 24 in. (1.5 mm
2
x 610
mm)
■
L120
Case:
Cast Aluminum
Float:
Brass
Rating:
2 A @ 30 VAC/DC
Mounting Bolts:
1
/
4
-20 UNC–2A (4 req'd)
■
L127 and L128
Case:
TROGAMID
®
Nylon
Float:
Brass
Rating:
2 A @ 30 VAC/DC
Wire:
16 AWG x 48 in. (1.5 mm
2
x 1.2 m)
Mounting Bolts:
• L127:
1
/
4
-20 NC x 2 in. (4 required)
• L128:
3
/
8
-16 NC x
3
/
4
in. (2 required)
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
L100
L120
L127/L128
†
Models available with high and low options. See
How to
Order
on reverse side.
**
Products covered by this bulletin comply with EMC
Council directive 89/336/EEC regarding electromagnetic
compatibility except as noted.
**
L-5937B
Revised 06-06
Catalog Section 15
Float Actuated Oil Level
Swichgage
®
instrument
