Murphy L-5937B Specification Sheet

Float Actuated Oil Level
Swichgage
L100
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.
® instrument
L120
L127/L128

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
1
Vent Fitting:
Inlet Fitting: Hex Nipple
Hardware (shipped loose)
L100:
• Copper Tubing:
(6 mm x 1.2 m)
• Reducer Bushing:
• Close Nipple:
1
• Tee: / NPT, black pipe
2
• Wire: 16 AWG x 24 in. (1.5 mm
mm)
L100W:
• Vent Tube:
• Reducer Bushing:
• Close Nipple:
3
• Tee: / NPT, black pipe
4
• Wire: 16 AWG x 24 in. (1.5 mm
mm)
L120
■
Case: Cast Aluminum
Float: Brass
Rating: 2 A @ 30 VAC/DC
Mounting Bolts:
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
■
1
/ in. (6 mm) tube x / NPT
4 8
1
/ NPT
4
1
/ x 48 in. dia.
4
1 1
/ NPT x / NPT
2 4
1
/ NPT
2
2 x 610
1 3
/ x 3- / in. (6 x 86 mm)
4 8
3 1
/ NPT x / NPT
4 4
3
/ NPT
4
2 x 610
1
/ -20 UNC–2A (4 req'd)
4
Catalog Section 15
**
L127 and L128
■
Case: TROGAMID ® Nylon
Float: Brass
Rating: 2 A @ 30 VAC/DC
Wire: 16 AWG x 48 in. (1.5 mm
Mounting Bolts:
1
• L127: / -20 NC x 2 in. (4 required)
4
3 3
• L128: / -16 NC x / in. (2 required)
8 4
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
†
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
2 x 1.2 m)