Murphy LM2000 User Manual
Description
The Murphy LM2000 model maintains the crankcase oil level of an engine,
pump or compressor. Adjusted to the correct running-oil-level, the LM2000 will
replenish oil as it is used. An integral, low-level switch will alarm and/or shutdown the equipment if supply oil is lost and the equipment continues to use oil.
Specifications
Crankcase Balance Vent Connection: 1/2 NPTF (top).
Inlet Connection: 1/2 NPTF with removable screen (side).
Outlet Connection: LM2000 3/4 NPTF (bottom).
LM2000S 2 x 3/8 NPTF (side)
1 x 3/4 NPTF (bottom)
Thumb-ValveTMMaterial: Viton.
Snap-switch: SPDT rating 10 A, 125 VAC; 0.5 A, 125 VDC; 10 A, 30 VDC.
Wire leads: 18 AWG x 24 in.(609 mm) length.
Conduit Connection: 1/2 inch conduit (female, top).
Case: Die cast aluminum
Lens: Clear “Frog Eye” non-staining, high impact, high temperature nylon; UV
and heat stabilized.
Dial: High visibility white background with green and white “index” lines
for normal level indication.
Maximum Inlet Pressure: 9.50 psi/25 ft. oil (head pressure).
Maximum Case Pressure: 15 psi (103 kPa).
Maximum Differential: 2 in. (51 mm) between running and stopped.
Maximum Ambient Temperature: 250°F (121°C).
Float: Brass
Flow Rates: SAE 40 motor oil @ 32°F (0°C) with 2 ft. head pressure: 0.5
GPH (1.9 LPH).
NOTE: Friction losses due to piping not considered.
Optional Vent Fittings Kit: 15000954
The 15000943 kit is sold separately. It includes the following items:
Quantity Description
1 Tubing vent (15050202).
1 1/4 x 1/4 NPT Connector (85030447).
Optional Hose Kit:
15000355
Quantity Description
1 1/2 in. (13 mm) I.D. x 3 ft. (914 mm) long hose (89020202)
1 1 in. (25 mm) I.D. x 3 ft. (914 mm) long hose (89020203)
2 1/2 in. (13 mm) worm gear clamp (00003502)
2 1 in. (25 mm) worm gear clamp (00003503)
2 1/2 NPT x 1/2 in. (13 mm) barbed fitting (89080801)
2 3/4 NPT x 1 in. (25 mm) barbed fitting (89081001)
Thumb-Valve™ Operation
As the equipment uses oil, the float falls, providing immediate level compensation. At FULL position, the float holds the valve closed. If the clean oil
supply is depleted and oil level continues to fall, the low level switch will
operate an alarm or equipment shutdown.
Service Parts
(Specify part number)
Description Part Number
Vent Fittings Kit 15000954
Hose Kit 15000355
1/2NPT x 1/2 in. Hose Barbed Fitting 89080801
3/4NPT x 1/2 in. Hose Barbed Fitting 89081001
3/8NPTF x 1/2 in. Hose Barbed Fitting 89080601
Pipe Bracket Kit 15000238
Universal Flange Kit 15010224
LM2000/LM2000S Lube Level Maintainer
Installation Instructions
LM-00011N
Revised 10-03
Section 15
(00-02-0423)
BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT
✔ Disconnect all electrical power to the machine.
✔ Make sure the machine cannot operate during installation.
✔ Follow all safety warnings of the machine manufacturer.
✔ Read and follow all installation instructions.
Please read the following information before installing. A visual inspection of this product for damage during shipping is
recommended before mounting. CRANKCASE MUST BE DRAINED BEFORE INSTALLATION.
GENERAL INFORMATION
Thumb-ValveTMand
Snap-switch
Schematic
LM-00011N page 1 of 4LM-00011N page 1 of 4
WARNING
Thumb-Valve™
FULL
Float
Action
LOW
COM.
(white)
Low Level Switch
Oil Inlet
LM2000
Case
N.C. (red)
N.O. (black)
LM-00011N page 2 of 4
TYPICAL INSTALLATION
DIMENSIONS
LM2000
Mounting the LM2000
NOTE: Mount the LM2000 as close as possible to the crankcase.
The following instructions are based on the usage of the pipe and universal
mounting brackets shown above.
Pipe Bracket Mounting (15000238)
1. Mount a nominal 1/2 inch (13 mm) diameter pipe to the base of the engine.
2. Install the pipe bracket to the LM2000 using two 1/4-20 UNC x 1 inch
bolts, nuts and lock washers supplied. See Figure 1A.
3. Slip the LM2000 onto the pipe and install the two adjustment bolts. Each
bolt consists of a 1/4-20 UNC x 1 in. bolt, nuts and lock washers. See
Figure 1B. DO NOT tighten the adjustment screws too tightly because
you will have to adjust the LM2000 later in the installation process.
Mounting with Universal Bracket (15000370)
The universal bracket has two mounting methods: base mounting or
pan mounting.
Base Mounting
1. Install the universal bracket to the base as shown in Figure 2A using two
flat washers and two 5/16 inch dia. bolts or others as necessary.
2. Mount the LM2000 to the universal bracket using two 1/4-20 UNC x 1-
1/4 inch (32 mm) bolts, nuts and lock washers supplied (Figure 2B).
DO NOT tighten the adjustment screws too tightly. You will have to
adjust the LM2000 later in the installation process.
Figure 1B
LM2000
Pipe
Bracket
Lock Washer
and Nut
Bolt
Pipe
Crankcase
Adjustment
Bolts
Figure 1A
Figure 2B
Crankcase
Base
Universal
Bracket
Threaded
hole
Adjustment
Bolts
Flat
Washer
Lock Washer
and Nut
Figure 2A
15000238
Pipe Bracket Kit
15010224
Universal Flange Kit
Additional Hardware
Supplied
(2) 1/4-20 x 7/8 inch
(22 mm) screws
(2) 1/4-20 x 1 inch
(25 mm) screws
(4) 1/4-20 hex nuts
(4) 1/4 inch (6 mm) dia.
split washer
Additional Hardware
Supplied
(2) 1/4-20 x 1/4 inch
(32 mm) bolts
(4) 1/4 inch dia. flat washer
(2) 1/4-20 hex nuts
(2) 5/16-18 x 1/4 inch
(32 mm) bolts
(4) 5/16 dia. flat washer
(2) 5/16-18 hex nuts
CAUTION:
Excessive vibration can cause over-
fill. Be sure mounting brackets are supported.
4-5/8 in.
(117 mm)
3/8 NPTF
LM2000S
Oil Outlet
Connection
3/4 NPTF
1/2 in. Electrical
Female Conduit
Connection
4-1/2 to 5-3/16 in.
(114 to 132 mm)
2-7/8 in.
(73 mm)
3/8 NPTF
LM2000S
Crankcase
Balance Vent
1/2 NPTF
Oil Inlet
Connection
1/2 NPTF
3/8 NPTF
LM2000S
Oil Outlet
Connection
3/4 NPTF
Oil Inlet
Connection
1/2 NPTF
C
L
2-1/4 in.
(57 mm)
4-1/2 in.
(114 mm)
9/32 x 5/8 in.
(7 x 16 mm)
2 places
1/4-20 NC
2 places
5-3/16 in.
(132 mm)
Hole 7/8 in.
(22 mm) dia.
Slot, 29/64 in. (14 mm)
x 2-3/8 in. (60 mm)
4 places
Slot, 29/64 in. (14 mm)
x 4-3/8 in. (111 mm)
3 places
4-1/2 in.
(114 mm)
5-3/16 in.
(132 mm)
2-1/2 in.
(63.5 mm)
6-11/16 in.
(170 mm)
1-3/4 in.
(44 mm)
7-1/2 in.
(191 mm)
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