1 LM-92149B. Revised 12-05. Level Maintainer Catalog Section 15. LM301-EX. LM300 Series Maintains proper lube Level Shutdown on low Level , or high and low Level Low Level alarm before shutdown Manual float switch test High visibility Frog Eye lens Optional pipe or universal mounting brackets Optional inlet orifices for low to high pressure ** applications Explosion-proof models available Patent 5493086. Description Max. Differential: 2 in. (51 mm) between running Optional Hose Kit: 15000355. The LM300 Series Level Maintainer automatical- and stationary oil Level . Quantity Description ly adds oil to the crankcase as needed to keep the Max. Case Pressure (MCP): 1 1/2 in. (13 mm) x lube Level normal. Most models have built-in 15 psi (103 kPa) [ bar]. 3 ft. (914 mm) long hose switches that will alarm and/or shutdown the Orifice Seal : Buna-N Thumb-Valve 1 1 in.
2 (25 mm) x equipment if the makeup supply is depleted and Switch Contact: Silver, SPDT snap acting, rated 3 ft. (914 mm) long hose engine oil Level falls or if overfill conditions exist. at 10 A @ 125, 250 VAC; 10 A @ 30 VDC. 2 1/2 in. (13 mm) worm gear clamp LM300 series explosion-proof models are CSA (1 only for low Level ; 2 only for high and low; or 2. certified for Class I, Division 1 Hazardous areas. 2 1 in. (25 mm) worm gear clamp only for low Level with alarm before shutdown). 2 1/2 NPT x 1/2 in. (13 mm) barbed fitting Applications Flow Rate Test: Using SAE 30 @ 32 F (0 C). 2 3/4 NPT x 1 in. (25 mm) barbed fitting Engines Pumps Compressors Coolers Orifice Pressure Flow Rates Diameter Base Models*. Specifications 1/4 in.* 4 ft. oil 15 ft. oil GPH - GPH LM300: Level Maintainer only (no switches). Case/Cover: Die cast aluminum.
3 (6 mm) ( m oil m oil) ( LPH - LPH). LM301: Low switch contacts for low Level shut- Switch Housing: Aluminum. 10 psig 30 psig down or alarm. Four wires, SPDT. 1/8 in. ( kPa 207 kPa) GPH - GPH. Approval Rating: LM301 thru LM305 : CSA (3 mm) [.69 bar] ( LPH - LPH) LM302: Two switches for low and high Level certified for non hazardous locations. shutdown or alarm. Four wires, DPST, wired Enclosure Type 4 certified. *Standard in normal operating ranges. LM301-EX thru LM305-EX: CSA certified NOTE: Friction losses due to piping NOT considered. LM303: Two switches for low and high Level for Class I, Groups C and D; Class II, Groups shutdown or alarm. Four wires, DPST, wired F and G hazardous locations. Enclosure Type 4 Outlet Connection: 3/4-14 NPT left side, right side, and bottom. in normal operating ranges. certified.
4 Crankcase Balance Vent Fitting: 1/2-14 NPT. LM304: Two switches. Alarm before shutdown Float: Rigid polyurethane foam. Polyurethane on low Level and shutdown on low-low Level . coated. Mounting: Accepts Murphy pipe mounting Four wires, DPST, wired in normal oper- Max. Ambient Temperature: 250 F (121 C) bracket or universal mounting bracket. ating ranges. Oil Inlet Connection: Top entry 1/2-14 NPT with Lens: Clear Frog Eye non-staining, high impact, LM305: Two switches. Alarm before shutdown built-in filter screen (removable for cleaning). high temperature nylon; UV and heat stabilized. on low Level and shutdown on low-low Level . Inlet Orifices: 1/4 in. (6 mm) standard. Dial: High visibility white background with Four wires, DPST, wired in normal oper- 1/8 in. (3 mm) available. green and white index lines for normal ating ranges.
5 Level indication. Wire (switch models): 18 AWG x 13 in. * Specify EX for explosion-proof enclosure. All models except ( mm2 x 330 mm). Test Knob: Rotate to test switch operation. LM300 are available in an explosion-proof enclosure. Turn clockwise for low Level test and turn ** Products covered by this bulletin comply with EMC Council Max. Inlet Pressure (MIP): directive 89/336/EEC regarding electromagnetic compatibility counterclockwise for high Level test. 30 psi (207 kPa) [ bar]. except as noted. CSA certified with switch contacts rated at 10 A at 250 V AC (standard). with 1/8 in. (3 mm) orifice. 15 ft oil ( m oil). with 1/4 in. (6 mm) orifice. Dimensions The dimensions below are for the optional EX model enclosure. The standard model enclosure dimensions are the same except the height and width which are: 7 in.
6 (178 mm) H, 7-7/8 in. (200 mm) W. Oil Inlet Connection 6 in. 1/2-14 NPT with (152 mm) 7-3/16 in. removable screen (183 mm). Electrical Crankcase Vent Conduit Snap Switch Connection 1/2-14 Case Assembly 1/2-14 NPT NPT. 5-15/16 in. Test (151 mm). Knob 8-1/4 in. 3/8-16. (210 mm) 2-3/4 in. UNC-2B. (70 mm) Mounting Holes, 2 places 5-3/16 in. Oil Outlet Connection (132 mm). 3 places, 3/4-14 NPT. Mounting Brackets with Hardware How to Order Build a complete model number using the following chart. See example. 15000371 See reverse page for standard and optional specifications. in. pipe bracket kit Example model number (132 mm). in. Additional Hardware (114 mm) Hole .88 in. Supplied LM301 - LC - EX - A. (22 mm) dia. (4) 3/8-16 UNC x 1 inch (25 mm) screws .376 in. in. (10 mm) (64 mm) (4) 3/8-16 nut minimum Orifices bottom surface (4) 3/8 lock washer Blank: 1/4 in.
7 (6 mm). 2 places (2) 3/8 flat washer Enclosure A: 1/8 in. (3 mm). 1/4-20 NC. Blank: Non-Explosion-proof 2 places EX: Explosion-proof Slot, .390 in. (10 mm). x 2 in. (51 mm) Variant 15000370 4 places (17 0 m in. LC = Less Case universal bracket kit m). Slot, .390 in. (10 mm). x in. (120 mm) . Additional Hardware 3 places 5 in Base Model: see reverse side for Supplied mm). (44. base model descriptions Hose Kit, Mounting Brackets and (2) 3/8-16 UNC x 1 inch LM300 (NOT available in EX enclosure) Lens assembly (25 mm) screws LM301 Order as separate items: (11 LM302 15000371: pipe bracket kit m n. (4) 3/8 flat washer ). i m 91 0. 4 in (1 (13 mm) . LM303 15000370: universal bracket kit (2) 3/8 lock washer 2 m in. m) LM304 15000355: hose kit (2) 3/8-16 nut LM305. 15000354: bubble lens assembly Shipping Information Shipping Weights: LM300 Series non- EX models: 6 lbs.
8 6 ozs. ( kg). LM300 Series EX models: 6 lbs. 12 ozs. ( kg). Warranty Shipping Dimensions (all LM300 Series models): A limited warranty on materials and workmanship is given with this FW. 10-5/8 x 8-7/8 x 6-3/4 in. (270 x 225 x 171 mm) Murphy product. A copy of the warranty may be viewed or printed by going to CONTROL SYSTEMS & SERVICES DIVISION FRANK W. MURPHY, LTD. Box 1819; Rosenberg, Texas 77471; USA Church Rd.; Laverstock, Salisbury SP1 1QZ; +1 281 633 4500 fax +1 281 633 4588 +44 1722 410055 fax +44 1722 410088. e-mail e-mail FW Murphy INDUSTRIAL PANEL DIVISION. Box 470248 MURPHY DE MEXICO, DE Box 470248. Tulsa, Oklahoma 74147 USA Blvd. Antonio Rocha Cordero 300, Fracci n del Aguaje Tulsa, Oklahoma 74147 USA. +1 918 317 4100 fax +1 918 317 4266 San Luis Potos , ; M xico 78384. +1 918 317 4100 fax +1 918 317 4266.
9 E-mail +52 444 8206264 fax +52 444 8206336. e-mail Villahermosa Office +52 993 3162117. e-mail Printed in 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. LM-92149B page 2 of 2.