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M0160.docx  |  Rev 1.3  |  Modified on 19/05/2020  |  © Remote Control Technologies Pty Ltd 

 

Compliance and Standards 

TBA 

Troubleshooting 

Troubleshooting the engine protection system requires more information from the manual that is supplied with 

the Muirhead

®

 EPS system. A typical engine protection schematic guide is provided in this manual. 

During troubleshooting, inspect all components and connectors before any components are replaced.  If 

connectors are not tight and clean, they can cause intermittent or permanent electrical faults.  Ensure the 

connectors are tight and clean before any other tests are carried out. 
Failure of an electrical component can cause or be caused by the failure of one or more other components.  

Always try to find and correct the cause of the engine protection system failure before replacing a component. 
Tools needed: 

 

Part no. 2005 – Digital Multimeter x 1 

 

Part no. 7599 – Circuit Tester x 1 

Digital Multimeter 
 

 

Use the part number 2005 digital multimeter or equivalent for making continuity checks and voltage 

measurements. It is recommended that the circuit tester, part number 7599 or equivalent only, be used to test 

the three outputs of the EPS control unit. 

Note 

If the EPS system is installed in conjunction with an idle timer and/or a fire status control unit, it is imperative 

that the units are installed in the correct order. Failure to do so may result in the machine not shutting down 

correctly. 

Refer to the appendix at the end of this manual for the correct sequence. 
 

 

Summary of Contents for 3565

Page 1: ...PRODUCT MANUAL ENGINE PROTECTION SYSTEM 6 FUNCTION TO SUIT WATER COOLED ENGINES Part No 3565 ...

Page 2: ...t 5 RCT provides the document to you on an as is basis RCT is not required to provide any updates to this version of the document RCT may make any change amendment or modification to the contents in this document without notice to you 6 RCT takes a best endeavour basis to ensure that the contents in this document are accurate complete and reliable RCT does not warrant that the document will contin...

Page 3: ...il Pressure Switch Function 2 12 Coolant Temperature Switch Function 3 13 Oil Fuel Level Switch Function 4 13 Coolant Flow Switch Function 5 14 Converter Oil Temperature Function 6 14 Engine Protection System Labelling 15 Alert Function Identification Labels 16 Typical Engine Protection System Schematic to suit 6 Function Water cooled Engine 236s 17 Calibration 18 Service Information 18 Service Sc...

Page 4: ...witches to suit Temperature Monitoring Applications 22 Flow Switches to suit Coolant Flow Applications 22 Oil Fuel Level Switches to suit the Oil Level Monitoring Applications 22 Alarms to suit the Warning Alert Function of the Control Unit 22 Technical Specifications 23 Additional Specifications 23 Power Supply 23 Inputs 23 Outputs 23 Compliance and Standards 24 Troubleshooting 24 Glossary 25 War...

Page 5: ...igure 1 Muirhead Engine Protection System part number 3565 7 Figure 2 EPS control unit external view 8 Figure 3 EPS label water cooled 15 Figure 4 Drawing 236s EPS protection system water cooled external wiring diagram 17 Figure 5 Drawing 478i ETR idle timer EPS fire controller external wiring diagram 27 ...

Page 6: ...ing to protect the machine and other equipment in the area Do not operate any machine with a known fault and report all findings to the supervisor in writing Test and operate machine as per machine OEM and site procedures Read and understand machine and site specific operational and testing instructions Product Before applying power to the equipment the user repairer installer must read all produc...

Page 7: ... parts the EPS control unit is extremely reliable easy to install and simple to use Every EPS control unit can be customised to monitor known problems and functions commonly associated with equipment failure Note Additional looms fittings switches lights and audible alarm maybe required to perform a complete installation Features and Functions Multi voltage 8 to 32 volts Alarm only return to idle ...

Page 8: ...operator to simulate a fault and test the complete system A connector with 12 contacts on the rear of the EPS control unit facilitates the necessary wiring for the inputs and outputs Figure 2 EPS control unit external view Wiring Connections No Function Type 1 8 Vdc to 32 Vdc Ignition supply 2 0 Vdc ground Ground 3 Output 1 Alarm control 4 Output 2 Idle control 5 Output 3 Energised to run control ...

Page 9: ...nction is not required pin 8 must be connected to ground Typical use Low engine oil pressure Function 3 This input is configured to have a one second delay prior to activating the corresponding alert indicator external audible alarm idle and ETR control circuits This circuit activates when the circuit changes state and becomes open If this function is not required pin 9 must be connected to ground...

Page 10: ...should not be connected This circuit overrides for 10 seconds after start is activated Engine Control ETR This circuit works in a similar way to the idle control output however it has a 0 to 40 second adjustable time delay This time delay is factory set to 10 seconds allowing the machine to run for 10 seconds after an alert indicator has been activated This circuit is an energised to run output Th...

Page 11: ...er to the wiring table below and the wiring diagram in this manual to wire up the control unit It is recommended that the wiring loom be installed alongside the OEM engine wiring ensuring that it is secured at regular intervals this will provide protection from heat and abrasion and any other excess damage that may occur with extended machine operation When securing the loom to the OEM engine wiri...

Page 12: ...the original equipment manufacturer OEM oil pressure switch as a guide for location Fit the oil pressure switch using thread sealant being careful not to over tighten Note T pieces are available in most thread types to enable both the OEM and Muirhead Oil Pressure Switches to be installed into the original port Part No 0018 12 PSI Normally Open Thread 1 8 NPT Part No 3074 8 PSI Normally Open Threa...

Page 13: ...ally Closed Thread 3 8 NPT Part No 8491 Heavy Duty Temp Switch 225 F 107 C Normally Closed Thread 3 8 UNO Oil Fuel Level Switch Function 4 The oil fuel level switch is a capacitive type switch with a NPT mounting thread and used to monitor levels in tanks and reservoirs The switch should be installed at the low level mark which is specified by the OEM Ensure there is sufficient clearance within th...

Page 14: ...Normally Open 56 mm Paddle Converter Oil Temperature Function 6 Installation The convertor oil temperature switch is to be installed in conjunction with the OEM convertor oil temperature switch It is imperative that the switch sensing area bulb be immersed in oil Install the switch using thread sealant Note Care should be taken when selecting a mounting port to allow sufficient depth for the bulb ...

Page 15: ...e diagram 3 Use a plastic card or similar tool to carefully push any air bubbles that form out to the edges of the label 4 Once all the decals that are required have been placed in their correct clear inserts on the main label remove the adhesive backing from the main label and fit it onto the engine protection control enclosure 5 Remove all air bubbles and clean the label The labelling process is...

Page 16: ...es Pty Ltd Alert Function Identification Labels Part No Label Part No Label 5636 6143 0427 1526 1372 5630 5629 5635 0426 5634 0437 5637 0428 1413 0442 4352 0453 5638 0486 5633 3465 4350 3144 5631 5785 5632 5780 4348 5782 1411 5784 4349 5779 5628 5781 1417 5783 8424 5778 1368 ...

Page 17: ...RED A BLANK IS PLACED ON THE UNUSED FUNCTION AND THE CORRESPONDING INPUT WIRE MUST BE CONNECTED TO GROUND S ENGINE TEMP OIL PRESSURE COOLANT LEVEL OIL LEVEL ALARM IDLE CONTROL ETR CONTROL START INPUT COOLANT FLOW CONVERTOR TEMP 8 30V SUPPLY GROUND YL 4 PK 4 BU WH 4 GY 4 GN 4 BN 4 YL BU 4 PU 4 OR 4 BK 4 WH 4 BU RD 4 T N C CONVERTOR TEMPERATURE SWITCH COOLANT FLOW SWITCH BK 4 WH 4 BK 4 BU RD 4 BK 4 ...

Page 18: ...ad if applicable 5 Refit the sensor ensuring the thread is free from coolant leaks Engine Oil Pressure Switch Every 2000 hours or six months 1 If engine oil faults are present and tests performed on the electrical circuit prove inconclusive it is recommended that the engine oil pressure switch be replaced 2 Due to the critical function of this switch it is recommended that the engine oil pressure ...

Page 19: ... following test procedure should be followed Control Unit 1 Start and run the machine as per normal raise the rpm above idle if the idle control function is used All alert indicators on the control unit should light up and activate the alarm on initial start up and cease immediately once the control unit has detected that the engine oil pressure has been pressurised 2 If the control unit has detec...

Page 20: ...eck that the engine temperature alert indicator is not illuminated 3 Disconnect one wire at the engine temperature switch 4 Verify that the engine temperature alert indicator is now illuminated 5 Turn the ignition off and reconnect electrical wiring Oil Fuel Level Switch Every 250 hours or during machine scheduled service 1 Turn the ignition switch to the ON position 2 Check that the oil level ale...

Page 21: ...3565 Control Unit Part No Description 5994 Loom 10 m to Suit 3747 3565 EPS Control unit Coolant Level Sensors Part No Description 2006 Coolant level sensor Light Duty 1 8NPT Plastic Body 30 mm Probe Shaft Length 2887 Coolant level sensor Light Duty 1 4 NPT Complete with Brass Bush 72 mm Probe Shaft Length 2205 Coolant level sensor Heavy Duty 1 4 NPT Brass Body 60 mm Probe Shaft Length Pressure Swi...

Page 22: ...ription 6041 Flow Switch N O 56 mm Plug Suits Engine Numbers 3306 3406 3408 3508 3512 and 3516 3690 Flow Switch N O 69 mm Paddle Suits Engine Number 3306 Oil Fuel Level Switches to suit the Oil Level Monitoring Applications Part No Description 3072 Oil Level Switch Capacitive N O 1 4 NPT Used For Temperatures Below 100 C Alarms to suit the Warning Alert Function of the Control Unit Part No Descrip...

Page 23: ...ches and sensors Min max input voltage 8 to 32 Vdc Circuit protection Reverse polarity protected outputs are current overload protected Enclosure type Aluminium powder coated Environmental protection IP rating IP65 Programming adjustment Refer to document number P0021 Additional Specifications Power Supply Supply spike withstand Absolute maximum spike 1J 250 A 8 20 µs pulse 1 event 100 A 50 µs 8 A...

Page 24: ... can cause or be caused by the failure of one or more other components Always try to find and correct the cause of the engine protection system failure before replacing a component Tools needed Part no 2005 Digital Multimeter x 1 Part no 7599 Circuit Tester x 1 Digital Multimeter Use the part number 2005 digital multimeter or equivalent for making continuity checks and voltage measurements It is r...

Page 25: ...sonal Identification Number ETR Energised To Run PLC Programmable Logic Controller ETS Energised To Stop POT Potentiometer ESD Engine Shutdown PPM Pulses Per Metre FET Field Effect Transistor PWM Pulse Width Modulation GND Ground PWR Power H Hours Rev Revision HEX Hexadecimal Numbering System RF Radio Frequency ID Identity RH Relative Humidity i e that is rpm Revolutions per minute In Input RX Rec...

Page 26: ...26 28 M0160 docx Rev 1 3 Modified on 19 05 2020 Remote Control Technologies Pty Ltd Warranty Please see the RCT standard warranty available on our website www rct global com ...

Page 27: ...le or in part for any purpose without the express authority of RCT The drawing is to be returned to RCT on demand ENERGISED TO RUN ETR IDLE TIMER 11450 EPS FIRE CONTROLLER CIRCUIT TO SUIT CATERPILLAR MACHINES EXTERNAL WIRING www rct net au UNCONTROLLED DOCUMENT REV 1 DWG No 478i STATUS NTS SCALE Released SHEET 1 of 1 BY EY DRN CW DATE 21 05 13 APPD DAS DATE 21 05 13 STOCK CODE PART NO 3rd ANGLE PR...

Page 28: ... 2020 Remote Control Technologies Pty Ltd Discover more www rct global com sales rct global com AUSTRALIA 61 0 8 9353 6577 AFRICA 27 0 83 292 4246 CANADA 1 705 590 4001 RUSSIA CIS 7 910 411 11 74 SOUTH AMERICA 56 3 5229 9409 USA 1 801 938 9214 ...

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