Murphy L-5937B - Manual

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