Murphy WD300-LV User's Manual
Contents
1. Reroute temperature capillary Locate open circuit and repair turn the contact adjustment against the pointer causing them to wipe against each other Be sure magneto is providing power to primary terminal post CD type magnetic switch used with magneto Remove and clean pressure orifice 2 Temperature capillary rerouted too close to 2 Reroute capillary exhaust manifold 3 Broken or crushed temperature capillary 3 Replace Swichgage instrument Fuel shutoff valve used on diesel engine Feedback from alternator Warranty Be sure all fittings are air tight use check valve in bypass line use rack puller in place fuel valve Install diode in excitation circuit 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 MURPHY gt www fwmurphy com 918 317 4100 Email sales fwmurphy 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 MURPHY the Murphy logo and Swichgage are registered and or common law trademarks of Murphy Industries Inc This document including textual matter and illustrations is copyright protected by Murphy Industries Inc with all rights reserved c 2006 Murphy Industries Inc In order to consistently bring you the highest quality full featu2. Swichgage instrument LIQUID COOLED ENGINES 1 Drain engine coolant to a level below the temperature sensing con nection plug This connection is on the engine side of the thermostat generally near the thermostat housing Consult your engine manual Remove adapter nut from temperature sensing bulb and union nut Apply a non hardening thread sealant to the adapter nut and screw securely into the water jacket opening on the engine 4 Route the temperature capillary away from hot surfaces such as exhaust manifolds Place the sensing bulb into the adapter nut and observe that the sens ing bulb does not bottom in the water jacket nor are there other obstructions in the water jacket opening Secure sensing bulb into the adapter nut with the 5 8 18 union nut See mounting detail below CAUTION Do NOT cut or bend the temperature capillary at a Ww N n sharp angle Excess capillary must be carefully coiled and secured The temperature sensing bulb must be immersed directly into the water jacket flow to sense coolant temperature Do NOT install into a tee or other fitting Use only Murphy adapter nuts 6 Coil excess temperature capillary into a 2 in 51 mm diameter minimum coil Tie the coil to prevent excessive movement Sensing Bulb Mounting Detail engine block sensing coolant eion ERUAN AIR COOLED ENGINES Temperature for air cooled engine can be measured in the cylinder head or in the
3. 8446N for Temperature Swichgage instruments Testing the Swichgage Instruments For face mounted contacts 20P 20T 20PW7 etc 1 With the engine running use a 1 16 in hex wrench to rotate the con tact until it touches the gauge pointer Do NOT force the contact against the pointer Engine should shut down and or alarm should operate Reset the contact 2 An alternative method of testing the shutdown circuit is to place a coin or other metal object between the contact adjustment and the bezel NOTE This method does NOT test the actual contact pair It does test the circuit beyond the contact 3 VERY IMPORTANT Each time you start the engine observe that the Swichgage instruments are indicat ing pressure or temperature etc Visual inspection and regular test ing should be normal procedure to ensure proper operation and to achieve maximum results from your Swichgage system TYPICAL WIRING DIAGRAM WITH 117PH MAGNETIC SWITCH Model 117PH Use for 12 or 24 VDC 20P 20T Pressure Temperature OO milla PB128S Stop Switch O O 1 Other Swichgage instruments CAUTION This wiring is typical for Murphy W Series small engine panels Items shown may or may not be included in your panel however the circuit is typical of how the component will be wired if it is included Refer to installation instructions for the specific component if included For off panel items such as shutdown devices s
4. D B 7 OExciter zzz TTN WS 93002N page 4 of 7 TYPICAL WIRING DIAGRAM WITH 518PH TATTLETALE JUMPERED 518PH WIRED WITH JUMPER Must specify 12 or 24 VDC Other Swichgage instruments Tachometer B O SIG GRD O O Distributor Fuel Valve 7 C J Energized to Run Rack Pull Solenoid RP2300 Series shown iN 20P 20T Hourmeter Pressure Temperature Jumper S Voltmeter milla PB128S Stop Switch O O gt L Ammeter Ignition coil Start Switch Energized to Run l x l Alternator WS 93002N page 5 of 7 CAUTION This wiring is typical for Murphy W Series small engine panels Items shown may or may not be included in your panel however the circuit is typical of how the component will be wired if it is included Refer to installation instructions for the specific component if included For off panel items such as shutdown devices see specific instructions supplied with the device To Magnetic Sensor Alternator Tach Terminal or Signal Generator E Battery TYPICAL WIRING DIAGRAM WITH 760A AND 761APH however the circuit is typical of how the component will be wired if it is included Refer to installation instructions for the specific component if included For off panel items such as shutdown devices see specific instructions supplied with the de
5. If the push button is black it should return to an extended position CAUTION If the pressure Swichgage is equipped with a face mounted lockout push button be sure that pressure has been established and that the lockout mechanism has disengaged Failure to disengage will prevent the Swichgage control from operating on low pressure 2 Allow the gngine to warm up and the thermostat to open Slightly loosen the 8 18 union nut on the temperature sensing bulb to allow trapped air to escape from the cooling system Retighten the nut WARNING Perform this operation using appropriate protection Trapped air and coolant may cause skin burns 3 Loosen the oil line fitting slightly at the pressure Swichgage to allow trapped air to escape from the tubing Retighten the fitting To Stop the Engine 1 Return the engine to idle speed and unload any driven equipment CAUTION You should stop the engine in a normal manner Turn off the power switch pull shutoff cable etc Do NOT use the Swichgage control instrument as a normal shutoff 2 DISTRIBUTOR IGNITION engine panels may have an Emergency Stop Button a start key switch or other power on off switch Operate that switch or button The nerve center Magnetic Switch will trip and open the ignition circuit to stop the engine 3 DIESEL ENGINES may be equipped with energized to RUN or energized to STOP devices For energized to RUN devices such as Murphy SV seri
6. battery ground cable DETAIL shockmount An nnn W WUA electrical gt ground jumper Connecting the Pressure Swichgage 1 Pressure tubing is generally not provided Use of good quality flexi ble pressure tubing hose and fittings is strongly suggested Use at least 3 16 in 5 mm I D tubing If using copper or rigid tubing install at least 12 in 305 mm flexible hose from the pres sure Swichgage instrument to the rigid tubing This prevents damag ing vibration from reaching the Swichgage instrument 2 Connect the pressure tubing to the s 27 NPT pressure port of the pressure Swichgage instrument Use of a non hardening thread seal ing compound is recommended although the thread is dry seal Be sure that thread sealant does not foul the pressure orifice NOTE The orifice can be removed for cleaning 3 Connect the pressure tubing to the pressure galley of the engine Generally this is at the oil filter housing Use of non hardening thread sealant is recommended Avoid droops or sink traps in routing of the pressure line Installation Accessories Tools and equipment needed e Thread sealant or Teflon tape e Straight edge screwdriver medium e Wire stripping and terminal crimping tools e Electrical wire for use on power connections e Adjustable wrench or open end wrench set WS 93002N page 1 of 7 INSTALLATION INFORMATION continued Connecting High Temperature
7. Murphy W Series Engine Panels General Installation Instructions WS 93002N Revised 04 06 Section 30 00 02 0191 MURPHY gt Read the following information before installing These installation instructions are typical for a variety of W Series engine panels and may not reflect the exact configuration for your panel assembly It is assumed that the installer is familiar with engine operations and has basic mechanical and electrical skills If additional assistance is needed please call your Murphy dealer or contact one of our offices at the numbers listed on this instruction sheet A visual inspection for any damage which may have occurred during shipping is recommended GENERAL INFORMATION BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT V Disconnect all electrical power to the machine V Make sure the machine cannot operate during installation V Follow all safety warnings of the machine manufacturer V Read and follow all installation instructions Description Generally pressure and temperature Swichgage contacts are wired to a central nerve center called a Magnetic Switch or Tattletale annunciator This nerve center is essentially a relay and when signaled by a Swichgage contact operation it either makes or breaks a circuit to oper ate an alarm or engine shutdown device Various nerve centers are used WD300 LV depending upon the operation to be performed the type of electrical power available and the type of al
8. arm or shutdown device used Typical wiring diagrams for the popular Tattletale annunciators and magnet ic switches are included in this instructions If a drawing of the specific model number is enclosed refer to that drawing for specific wiring CAUTION Certain dangers to human safety and to equipment may occur if some equipment is stopped without pre warning It is recommended that monitored functions be limited to alarm only or to alarm before shutdown INSTALLATION INFORMATION Mounting the Panel 1 Select a suitable mounting location on or near the engine The location should provide easy access to the panel and provide unobstructed viewing of the Swichgage instruments 2 The mounting location should avoid shock and vibration to the extent possible Generally a location low on the engine is preferred Avoid mounting on top of the engine if possible Shockmounts are suggested where possible to dampen shock and vibration IMPORTANT Use of improper shockmounts can accelerate the shock and vibration effects Consult the factory if you are in doubt NOTE If shockmounts are used it is suggested that a separate ground wire be attached to the panel assembly and to the engine This assures electrical continuity between the Swichgage contacts and the battery ground across the shockmounts see mounting detail below WARNING Perform mounting operation with power source OFF Disable the engine so it cannot start Remove the
9. edures and make sure the panel is properly installed If problems persist after making the following checks consult any Murphy facility SYMPTOM Engine will not start Pointer burned in two False shutdown SWICHGAGE contact closes but does not trip the magnetic switch to stop the engine Inaccurate readings Engine does not stop immediately Magnetic Switch trips but engine does not stop PROBABLE CAUSE 1 Blown fuse at magnetic switch 2 Accidental ground to S or C terminals 3 Overload circuit due to accessories 4 Open circuit in 518PH wiring Overload of pointer contact due to exces sive load or short circuit 1 Wire from Swichgage instrument is grounded or shorted to contact 2 Closed Loop circuit has intermittent open or short 3 Excessive shock or vibration causes magnetic switch to trip 4 Lack of coolant around temperature sensing bulb causes hot spot 5 Temperature capillary routed too close to exhaust manifold Incomplete circuit 1 Pressure orifice plugged with thread sealant CORRECTIVE ACTION 1 Replace fuse 2 Check for ground and correct 3 4 Repair circuit Re route accessory circuits Remove or reduce load remove short circuit and replace Swichgage instrument Remove ground or short Check all wiring and repair Isolate panel from shock vibration Check coolant level loosen the union nut to allow trapped air to escape
10. ee specific instructions supplied with the device SIG GRD 7 9 To Magnetic Sensor Alternator Tach Terminal or Signal Generator am 6 ee Distributor Ignition coil Fuel Valve N Energized to Run 7 N ial Rack Pull Solenoid RP2300 Series shown Ammeter i ee Battery Switch iN Alternator WS 93002N page 3 of 7 TYPICAL WIRING WITH 518PH TATTLETALE CLOSED LOOP however the circuit is typical of how the component will be wired if it is included Refer to installation instructions for the specific component if included For off panel items such as shutdown devices see specific instructions supplied with the device Tachometer 518PH WIRED CLOSED LOOP MUST specify 12 or 24 VDC B O SIG GRD O O CAUTION This wiring is typical for Murphy W Series small engine panels Items shown may or may not be included in your panel To Magnetic Sensor Alternator Tach Hourmeter Terminal or Signal Generator Other P F 20T F Swichgage instruments Poon Temperature Voltmeter To From Other Normally Closed Contacts Ammeter i Distributor Battery Ignition coil Fuel Valve StartAce Switch Energized to Run He tk JI l Energized to Run Rack Pull Solenoid RP2300 Series shown
11. es fuel valves or RP type solenoids operation is identical to above for distributor ignition engines The energized to RUN device is de energized and the engine stops For energized to STOP devices the nerve center magnetic switch applies battery power to the stop device Power is removed after a short time delay depending on the specific nerve center magnetic switch See instructions supplied with the shutdown or alarm device For normal stop pull the manual stop cable WS 93002N page 2 of 7 Setting the SWICHGAGE contacts 1 Face mounted contacts are set using a 1 16 in hex wrench 2 Some models such as 20PE 20TE etc may not have field adjust ment Consult the factory if in doubt 3 Observe the normal operating oil pressure and coolant tempera ture readings Set the oil pressure Swichgage contact slightly below the minimum reading observed or slightly above the minimum pressure recommended by the engine manufacturer E oa usn If the pressure Swichgage instrument has a lockout push button on the face a contact setting higher than the factory setting will make the lockout device inoperative 4 Set the temperature Swichgage contact slightly above the normal operating temperature reading observed or slightly below the maxi mum temperature recommended by the engine manufacturer NOTE More detailed instructions are contained in Installation Sheet P 95033N for pressure Swichgage instruments and T
12. h will result in contact failure in the Swichgage and failure of the shutdown or alarm device to operate Electric Wiring 1 Disconnect the battery ground cable or otherwise disconnect electric power from the engine and panel 2 See the appropriate typical or specific wiring diagram for the nerve center magnetic switch in your panel 3 Generally you will only be required to wire the battery or other electri cal power to the nerve center magnetic switch and the output circuit from the nerve center magnetic switch to the alarm or shutdown device 4 Ammeters should be direct wired according to the wiring included with this panel Use minimum 10 AWG cable 5 Be sure that the connected load s does not exceed the voltage and current ratings of the nerve center magnetic switch or Swichgage Placing Into Operation 1 Refill oil and coolant to proper levels 2 Reconnect electrical power 3 Service the engine as required by the engine manufacturer before attempting to start the engine To Start the Engine 1 Fully depress the red or black push button of the nerve center mag netic switch on the panel face Hold in the button while cranking the engine This overrides the engine shutdown to allow starting When the oil pressure pointer moves away from the pointer contact or when pressure exceeds the preset low trip point release the push button The engine should be operating If the push button is red it should remain depressed
13. lubricating oil Oil temperature will give a more uniform reading than cylinder head since the oil circulates throughout the engine Refer to specific instructions supplied if any for your specific application 1 Oil Temperature a The Swichgage sensing probe must be fully immersed in the oil pan oil filter housing oil cooler etc depending on engine model and configuration b Observe all precautions for liquid cooled engines 2 Cylinder Head Temperature a Generally the cylinder head must already have a hole drilled and tapped for insertion of the temperature sensing probe b If a hole is not provided in the cylinder head and no provision is made to drill and tap one it may be possible to install an external bolt on heat sink such as the Murphy HS7 c Coat the temperature sensing probe with a high temperature grease A mixture of silicone and graphite flakes is recom mended although grease alone can be used CAUTION Do NOT apply too much grease If grease is pushed out of the hole when temperature probe is inserted remove some grease d Observe all precautions for liquid cooled engines Installing the Engine Stop Device or Alarm Follow instructions provided with the stop device or alarm CAUTION The Swichgage contacts are pilot duty Generally a nerve center magnetic switch or relay is required between the Swichgage contacts and the shutdown or alarm device Failure to use a nerve center magnetic switc
14. red products we reserve the right to change our specifications and designs at any time WS 93002N page 7 of 7
15. vice CAUTION This wiring is typical for Murphy W Series small engine panels Items shown may or may not be included in your panel 760A and 761APH Tachometer 760A 761 APH Must specify 12 or 24 VDC Specify positive or negative ground 30 second time delay standard B O SIG GRD O O To Magnetic Sens Hourmeter Alternator Tach Terminal or Signal Generator Other 20P 20T Swichgage instruments Pressure Temperature Voltmeter Ba Ammeter PB128S Stop Switch eo O pistibulor Ignition coil Fuel Valve Switch Murphy s SV Series gt Energized to Run l x Ero to Run Rack Pull Solenoid Murphy s RP2300 Series shown iiil Alternator NOTE 1 With terminal G grounded the time delay operates only on start after the initial time delay the shut down circuit is operated immediately when Swichgage contact operates With terminal G not grounded the time delay operates both on start and stop WS 93002N page 6 of 7 TROUBLESHOOTING TIPS Make sure the voltage and current requirements are within the W Series ratings Determine the polarity for the application Use appropriate wire size for voltage and current These instructions will assist in the correction of most problems which you may encounter with the panel Before checking the list first refer to the wiring connections and operation proc
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