Murphy LM2000S, LM2000 User Manual

Description

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.

Application

The LM2000 maintains oil level on any size
engine, but is recommended for small to medium
volume applications and installations that require a
3-wire, snap-action switch.

How the LM2000
Maintains Levels

As crankcase oil level drops, the LM2000 float
also drops and opens the Thumb-Valve

TM

. This
allows oil to flow from the supply tank, through
the LM2000, and into the crankcase. When proper
level is attained in the crankcase, the LM2000 float
rises, causing the Thumb-ValveTMto close off fur­ther oil flow.

The simple and unique Thumb-ValveTMis non­clogging and provides a positive, leak-free seal.

Flow rate through the 1/8 in. (3 mm) orifice is suffi­cient to allow crankcase refill through the LM2000.

Specifications

Crankcase Balance Vent Connection:

1/2 NPTF (top).

Inlet Connection: 1/2 NPTF 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)
(1/8” orifice).

NOTE: Friction losses due to piping not considered.

Optional Vent Fitting Kit: 15000954

Kit sold separately–includes the following items:

Quantity Description

1 Tubing vent (15050202).
1 1/4 x 1/2 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.

LM-00010B page 1 of 2

Model LM2000/LM2000S

■

Eliminates under/overfill due to “human error”

■

See oil level and condition without shutting down

■

Simple installation

■

Automatically maintains lube level

■

Low level switch

■

Positive sealing Thumb-Valve

™

■

Heating loop and special mounting capabilities*

Not intended for use with fuel

Thumb-ValveTMOperation (Simplified)

* Contact the factory for detailed information.

See back page for telephone and fax.

LM-00010B

Revised 10-03

Catalog Section 15

(00-02-0422)

Lube Level Maintainer

Thumb-Valve™

FULL

Float

Action

LOW

COM.

(white)

LM2000
Case

N.C. (red)

Low Level Switch

N.O. (black)

Oil Inlet

LM-00010B page 2 of 2

Shutoff
Valve

Oil Outlet

Electrical Conduit
wire to switch circuits

Oil
Inlet

LM2000
Oil Level Maintainer

CRANKCASE

CLEAN Oil Supply Tank.
Height above LM recommended
2 ft. (0.6m) minimum and 25 ft
(7.7m) maximum.

For vented crankcase use the
plastic vent plug or optional
vent tube kit (15000954).
For sealed systems, vent must be
piped back to crankcase,
above oil level.

LM2000 Typical Installation

1/2 in. Electrical
Female Conduit
Connection

Crankcase
Balance Vent
1/2 NPTF

4-5/8 in.

(117 mm)

4-1/2 to 5-3/16 in.

(114 to 132 mm)

Oil Inlet
Connection
1/2 NPTF

Oil Outlet
Connection
3/4 NPTF

3/8 NPTF
LM2000S

3/8 NPTF
LM2000S

2-7/8 in.
(73 mm)

C

L

2-1/4 in.
(57 mm)

Oil Inlet
Connection
1/2 NPTF

Oil Outlet
Connection
3/4 NPTF

3/8 NPTF
LM2000S

How to Order

Specify model LM2000

LM2000S

Accessories (Specify part number)

Description Part Number

Vent Fittings Kit 15000954
Hose Kit 15000355
1/2NPT x 1/2 in. Hose Barbed Fittng 89080801
3/4NPT x 1 in. Hose Barbed Fitting 89081001
3/8NPTF x 1/2 in. Hose Barbed Fittng 89080601
Pipe Bracket Kit 15000238
Universal Flange Kit 15010224

LM2000/LM2000S Shipping Dimensions:

9 x 5-1/2 x 6 in. (229 x 140 x 152 mm).

LM2000/LM2000S Shipping Weight:

3 lbs. 6 oz. (1.5 kg)

Mounting Brackets with Hardware

Murphy offers two mounting brackets for the LM2000. The 15000238 Pipe
Bracket Kit fits a 7/8 in. (22 mm) diameter pipe (see typical installation
below). The 15010224 universal Flange Kit allows various mounting methods.

Dimensions

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 1-1/4 inch

(32 mm) bolts

(4) 1/4 inch dia. flat washer
(2) 1/4-20 hex nuts
(2) 5/16-18 x 1-1/4 inch

(32 mm) bolts

(4) 5/16 dia. flat washer
(2) 5/16-18 hex nuts

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

CONTROL SYSTEMS & SERVICES DIVISION

P.O. Box 1819; Rosenberg, Texas 77471; USA
[phone] fax [phone]

e-mail [e-mail]

MURPHY DE MEXICO, S.A. DE C.V.

Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje
San Luis Potosí, S.L.P.; México 78384
[phone] fax [phone]
Villahermosa Office [phone]
e-mail [e-mail]
www.murphymex.com.mx

FRANK W. MURPHY, LTD.

Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.
[phone] fax [phone]
e-mail [e-mail]
www.fwmurphy.co.uk

MURPHY SWITCH OF CALIFORNIA

41343 12th Street West
Palmdale, California 93551-1442; USA
[phone] fax [phone]
e-mail [e-mail]
www.murphyswitch.com

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.

MACQUARRIE CORPORATION

1620 Hume Highway
Campbellfield, Vic 3061; Australia
[phone] fax [phone]

e-mail [e-mail]

FW Murphy

P.O. Box 470248
Tulsa, Oklahoma 74147 USA
[phone]

fax [phone]
e-mail [e-mail]

www.fwmurphy.com

R

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USA–ISO 9001:2000 FM 28221

UK–ISO 9001:2000 FM 29422

Printed in U.S.A.

4-1/2 in.

(114 mm)

5-3/16 in.
(132 mm)

Hole 7/8 in.
(22 mm) dia.

9/32 x 5/8 in.
(7 x 16 mm)
2 places

1/4-20 NC

2 places

2-1/2 in.

(63.5 mm)

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)

6-11/16 in.

(170 mm)

7-1/2 in.

(191 mm)

1-3/4 in.
(44 mm)