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Disconnect all electrical power to the machine. • Make sure machine cannot operate during installation. • Follow all safety warnings of the machine manufacturer. • Read and follow all installation instructions. • Please contact FW MURPHY immediately if you have any questions.
The Murphy LM500 model maintains the crankcase oil level of an engine, pump or compressor. Adjusted to the correct running-oil-level, the LM500 will replenish oil as it is used. The low-level switch will alarm and/or shutdown the equipment if the supply oil is lost and the equipment continues to use oil.
Operating the Range of the Snap Switch Figure 1 shows the LM500 dial and the operating range of the switch. If level is within the designated zones, the switch will activate. The switch activates approximately 1/4 in. (6 mm) from the bottom of the low zone. The dial-in Figure 1 shows that if the level continues to drop into the low-low zone, a shutdown will occur.
Pipe Bracket Mounting (PM) (P/N 15000518) 1. Mount a nominal 1/2in. (13mm) diameter pipe to the base of the engine. 2. Install the pipe bracket to the lM500 using two 1/4-20 UNC x 1 inch bolts; nuts and lock washers supplied. See Figure 2A.
2. Mount the LM500 to the universal bracket using two 1/4-20 UNC x 1-1/4 inch (32mm) bolts; flat and lock washers supplied (Figure 3B). DO NOT tighten the adjustment screws too tight as you will have to adjust the LM500 later in the installation process.
2. Mount the LM500 to the universal bracket using two 1/4-20 UNC x 1-1/4 inch bolts, flat and lock washers supplied. DO NOT tighten the adjustment bolts to tight as height adjustment might be needed later during the operation. Refer to “Connecting Fittings and Hoses”...
Install the oil inlet connection. 2. Connect a 1/2inch I.D. (13mm) or larger hose to the oil inlet fitting on the LM500 and to the shutoff valve on the oil supply tank. See Figure 6. Recommended minimum height above the LM500 is 2 ft.
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