Murphy LR857 Installation Instructions

Installation Instructions for
LR857 Level Regulator
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.
WARNING
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.

Description

Murphy LR857 Lube Level Regulator maintains the crankcase oil
level of an engine, pump or compressor. Adjusted to the correct run-
ning-oil-level, the LR857 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

Inlet Connection: 5/8 in. (16 mm) I.D. hose
Outlet Connection: 3/8 NPT
Snap-switch: SPDT rating 10 A @ 125 VAC; 0.5 A @ 125 VDC;
10 A @ 30 VDC
Conduit Connection: 1/2 NPT
Case: Die cast aluminum
Lens: Polycarbonate
Float: Brass
Thumb-Valve™ Operation
Simplified Drawing
Thumb-Valve™
FULL
Float
Action
LOW
COM. (white)
N.O. (black)
N.C. (red)
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.

GENERAL INFORMATION

Oil Inlet
LR857
Case
Low Level
Switch
LR-9017N page 1 of 2
*
Optional Mounting Brackets And Fittings Kit
Murphy offers two mounting brackets for the LR857. The (15000238)
Pipe Bracket Kit fits a 7/8 in. (22 mm) diameter pipe. The (15010224)
Universal Flange Kit allows various mounting methods. See
Dimensions section on reverse side.
The (15000420) Fittings Kit includes the following:
Quantity Description
1 1/4 in. (6 mm) O.D. copper cane tube (vent connection)
1 1/4 in. (6 mm) tube x 1/4 male pipe fitting
1 1/2 in. (13 mm) I.D. hose fitting (outlet connection)

Flow Rates

Oil with 0.9 specific gravity @ 70°F (21°C)
9.73 psi
25
20
15
10
05
0
0 psi
0

Service Parts

Part Number Description
15000159 Inlet Valve Assembly
15000100 Glass and Switch Assembly
15000161 Lid Assembly
15000941 Float Assembly (Brass-std)
15010224 Universal Flange Kit
15000238 Pipe Bracket Kit
15000420 Fittings Kit
* Products covered by this literature comply with EMC Council directive 89/336/EEC regarding
electromagnetic compatibility except as noted.
LR-9017N
Revised 03-05
Section 15
(00-02-0177)
Flow:
USGPM
0.2500 0.5000