1. Manuals
  2. Brands
  3. GREER Company Manuals
  4. Controller
  5. MicroGuard MG510
  6. Installation, calibration and troubleshooting manual

GREER Company MicroGuard MG510 Installation, Calibration And Troubleshooting Manual

Retrofit for terex
Hide thumbs
Table of Contents

Advertisement

Quick Links

Retrofit for Terex
Green
Red
Pos
White
Neg
Black
Existing Crane
Existing Swing Pot
A
2
1
B
Black
A450251
RCI 510 Display
Installation, Calibration and
Troubleshooting Manual
MicroGuard 510
Wiring
White
Red
Green
Existing Reeling
Drum
Red
- BLD 2
White
- BLD 1
Black
- BLD 8
Green
- BLD 7
White
- BLD 37
Red
- BLD 34
Green
- BLD 36
Black
- BLD 35
A450769
Computer

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the MicroGuard MG510 and is the answer not in the manual?

Questions and answers

Summary of Contents for GREER Company MicroGuard MG510

  • Page 1 MicroGuard 510 Retrofit for Terex Green Existing Reeling Drum White Black Existing Crane Wiring - BLD 2 White - BLD 1 Black - BLD 8 Green - BLD 7 Existing Swing Pot White Black A450769 Computer White - BLD 37 - BLD 34 Green - BLD 36...

  • Page 2: Table Of Contents

    Table of Contents Chapter 1 – Installation Introduction ..........................4 1.1 System Parts ........................4 1.2 Upgrade Parts ........................5 1.2.1 A450769 Computer Assembly ..................5 1.2.2 A450251 RCI 510 Display ................... 5 1.2.3 A250690 Reeling Drum ....................6 1.3 Computer Wiring ........................7 1.4 Units with Swing Switches ....................
  • Page 3 3.4.2 Displayed Load or Radius Errors ................. 52 3.5 Computer Unit Overview ...................... 54 3.5.1 Computer Unit Layout ....................54 3.5.2 Internal Status Indicators ..................... 54 3.5.3 Function Kickout Fuse ....................55 3.5.4 Pressure Sensors ......................55 3.5.5 Replacing the Computer Unit ..................56 3.6 Display Console Overview ....................

  • Page 4: Chapter 1 - Installation

    Chapter 1 - Installation Introduction The MicroGuard MG510 replaces the previous Terex MG404, 414, and RCI 500 system currently using the obsolete MG400 computer. This section will cover the necessary installation instructions for the MicroGuard 510 using the new 500 series computer.

  • Page 5: Upgrade Parts

    1.2 Upgrade Parts: 1.2.1 A450769 Computer Assembly – Where applicable, the computer assembly includes a wiring harness designed to integrate with the existing Terex crane wiring harness where applicable. Refer to the installation drawing below. Green **See Note** Existing Reeling Drum White Black...

  • Page 6: A250690 Reeling Drum

    1.2.3 A240690 Reeling Drum – If you replace the exisiting reeling drum with A240690, the installer must replace the guides for the Anti-Two-Block cabling. The guides support the level wind system fo the reeling drum. The part number for the new guide kit is K056005 and includes the new guides and installation instructions.

  • Page 7: Computer Wiring

    1.3 Computer Wiring The RCI 510 System is based on the original wiring done by the factory. Greer Company cannot assume responsibility for color codes used on wiring done at the time of origin. We have identified the wiring inside and outside of our computer to assist with the installation. It is the responsibility of the installer to properly identify the correct wires and routings on the crane for connections to the MG510 computer.
  • Page 8 Computer Wiring Connections Connection Connection Work Instruction A450663 A450763 JP3-1Battery 0V BLD 1 Battery -VE Connect to Frame Ground Connect to Crane Power 12V - 36V System Power JP3-2 BLD 2 Battery +VE (Fused at 10 Amp power source) JP 5-1 Relay Power Feed BLD 7 Relay Power Feed Power for Function Kickout Power to Function Kick Out Solenoids...

  • Page 9: Units With Swing Switches

    1.4 Units with Swing Switches Some older units in the field may use swing switches instead of swing potentiometers. Refer to the appropriate work area schematic. Connection Description Work Instructions A450763 Rear BLD 20 DIN 0 Digital 0V Side BLD 27 DIN 1 Over Side Chart Front...

  • Page 10: Removal And Installation

    1.5 Removal and Installation 1. Place the crane in rigging mode and raise the boom. This will allow access to the hose fittings and wiring harness connections. NOTE: Leave the power and FKO cables connected to allow movement of the boom during the removal and installation process.
  • Page 11 13. If using the retangular reeling drum, disconnect the reeling drum cable and remove. The new computer is wired with a new cable and only needs to be attached to the reeling drum. 14. Install the display. 15. Install the display cable. 16.

  • Page 12: Chapter 2 - Calibration

    Chapter 2 - Calibration Introduction The Greer Company is dedicated to the design and manufacturing of electronic parts created to aid in crane operation. This section was developed to assist Service Personnel understand, locate, and identify problems that may arise during the operation of the Greer System. The crane operator must be knowledgeable in safety guidelines, crane capacity information, and the crane manufacturer’s...

  • Page 13: The Microguard 510 Display

    2.2 The MicroGuard 510 Display 2.2.1 Command Entry The buttons that are identified as A, B, C, and D will be used most for the procedures described in this document and their function will vary depending on the routine being performed. Commands for each routine will show in the information window as text adjacent to the buttons.
  • Page 14 2. Select the decimal “.” then press button A. 3. Repeat steps 1 and 2, to enter the numbers “9” and “8”. 4. After the numbers are entered, press button B or D until the minus sign “-” is selected and then press button A.

  • Page 15: Preliminary Checks And Measurements

    2.3 Preliminary Checks and Measurements Boom Pivot Main Boom Boom Hoist Cylinder Boom Hoist Cylinder Upper Pivot Boom Hoist Cylinder Lower Pivot Record the following measurements and check for accuracy. If measurements exist in the system from a previous application, or if no measurements exist, enter the new measurements into the system. Validate any data supplied by the crane manufacturer before calibration begins.

  • Page 16: Winch Dimensions

    2.3.2 Winch Dimensions Centerline of Rotation Rear Winch Front Winch Swing Offset Sheave Radius USE THE SPACE PROVIDED IN APPENDIX A TO RECORD THE MEASUREMENTS. Dimension “G0” and “G1” - The horizontal distance between the center of the front and rear winch, and the center of the boom pivot.

  • Page 17: Boom Cylinder Dimensions

    2.3.3 Boom Cylinder Dimensions USE THE SPACE PROVIDED IN APPENDIX A TO RECORD THE MEASUREMENT. Dimension “M” - This is the distance measured around the outside of the cylinder rod, divided by 12. 2.3.4 Span Dimensions WARNING! SETTING THE SPANS ON THE CRANE WILL REQUIRE FULL EXTENSION OF THE BOOM. ENSURE THE CRANE IS SETUP ACCORDING THE MANUFACTURER’S OPERATION MANUAL TO ENSURE MAXIMUM STABILITY.

  • Page 18: Auxiliary Head Dimensions

    2.3.5 Auxiliary Head Dimensions Centerline of Boom Offset Angle X.X° Length Auxiliary Head Main Boom Length - Measure the distance between the Auxiliary Head sheave and the Main Head sheave. USE THE SPACE PROVIDED IN APPENDIX A TO RECORD THE MEASUREMENT. 2.3.6 Stowed Jib Dimensions Balanced Pick Point = Center of Gravity...

  • Page 19: Installation Checks

    2.4 Installation Checks 1. Check the wiring and EPROM installations. 2. Check the swing switches, if fitted. Use the digital monitor screen (located under Menu 13 – Digital Inputs) on the MG510 to ensure that the switches operate properly. Digital input information for the wiring is located in the installation guide.

  • Page 20: Entering Calibration Data

    2.5 Entering Calibration Data WARNING! WHEN THE SYSTEM IS IN CALIBRATION MODE, AUTOMATIC OVERLOAD CONTROLS ARE DISABLED. THE CRANE OPERATOR IS RESPONSIBLE FOR PROPER LOADING OF THE CRANE WHILE PERFORMING CALIBRATION OF THE SYSTEM. To enter calibration data it is necessary to put the system in calibration mode. To access calibration mode: 1.

  • Page 21: Calibration Menus

    2.5.1 Calibration Menus 00 Error codes – Displays system information and error codes. 01 Crane Data – Used to reset and backup the crane personality data. 02 Dimensions – Used to enter the crane geometry dimensions previously recorded. 03 Extension Sensor – Used to set the zero point and span of the extension sensor. 04 Angle Sensor –...
  • Page 22 Menu 01 – Crane Data This menu displays the status of the personality. 1. Press the Menu Up or Menu Down button until “01 Crane Data” appears in the information window at the right. 2. Press the C button adjacent to “01 Crane Data” to enter the routine. TEST 3.
  • Page 23 Menu 02 – Dimensions This menu is used to enter the physical dimensions of the crane that were previously recorded in Appendix A. 1. Press the Menu Up or Menu Down button until “02 Dimensions” appears in the information window at the right. 2.
  • Page 24 Menu 03 - Extension Sensor This menu allows for entering the zero point and span of the extension sensor that were previously recorded in Appendix A. 1. Press the Menu Up or Menu Down button until “03 Extension Sensor” appears in the information window at the right.
  • Page 25 Menu 03 – Extension Setting Extension Span WARNING! BEFORE EXTENDING THE BOOM, MAKE SURE THE AREA AROUND THE CRANE IS STABLE AND SAFE. MANY CRANES WILL TIP OVER IF THE BOOM IS EXTENDED HORIZONTALLY!! TEST 1. Press the Span Extension? = XX.XX button. 2.
  • Page 26 Menu 04 – Angle Sensor This menu is used to enter the zero point and span for the angle sensor. 1. Press the Menu Up or Menu Down buttons until “04 Angle Sensor” appears in the information window at the right. 2.
  • Page 27 Menu 05 – Swing Potentiometer (If Equipped) This menu is used to enter the zero point and the swing of the swing potentiometer (if equipped). The swing potentiometer is located in the collector ring assembly under the hydraulic swivel. The job of the potentiometer is to track the movement of the upper half of the crane all the way around the swing circle.
  • Page 28 Menu 06 – Pressure WARNING! MAKE SURE THE CRANE IS SET UP IN ACCORDANCE WITH THE MANUFACTURER’S OPERATION MANUAL FOR MAXIMUM STABILITY. ENSURE THAT ALL BOOM EXTENSIONS AND LOADS LIFTED ARE WITHIN THE APPROPRIATE LOAD CHARTS AND LIMITS. FAILURE TO COMPLY WITH MANUFACTURER’S LIMITS MAY RESULT IN SERIOUS INJURY OR DEATH.
  • Page 29 Perform Piston Calibration. Press the Yes or No button. TEST a. Press No to enter the known piston diameter. Press Yes to go to the screen to calibrate cylinder diameter. b. Press Yes to calibrate the load. Enter the load in tenths, including the load, hook ball, and load handling slings.
  • Page 30 Menu 07 – Radius/Moment This menu is used to calibrate the radius and moment of the boom. 1. Press the Next or Prev buttons until “07 Radius Moment” appears in the information window at the right. TEST 2. Press the 07 Radius Moment button will give you a chance to enter an existing calibration in the edit mode, or start a brand new calibration.
  • Page 31 5. For each extension calibration, the system requires a stable measure of the moment (taken from its own pressure sensors) and radius (taken from manual measurements) at both high and low boom angles. Enter the corrected radius at this point per the number entry instruction. TEST 6.
  • Page 32 Menu 08 – Boom Deflection This menu is used to enter the deflection of the main boom under the weight of a calibrated load. Boom deflection is a natural occurrence and can have a significant effect on the boom radius under load. In order to properly calibrate boom deflection the boom needs to be fully extended at an approximate 65°...
  • Page 33 Menu 9 – Compensation The purpose of the compensation system is to ensure during boom down operations the hook load remains accurate. It is not uncommon, when boom down operations begin, to see a slight dip in the hook load. But if properly adjusted, the load compensation system will more accurately display the load. TEST 1.
  • Page 34 Menu 10 – Calibrating Erected Attachments NOTE: When an “Uncalibrated Jib Attachment” is erected there will be a warning at the bottom of the information screen that reads “WARNING – JIB NOT CAL’D”. 1. Erect the jib attachment to be calibrated in the operator set up and set the pick point. Once the setup is completed, enter the calibration menu and press the Menu Up button until “10 Erected Attachments”...
  • Page 35 7. Raise the boom to 60° or higher. The system will display the configuration has been relocated at a high boom angle. TEST 8. Press the Calibrate button then measure and enter the high angle radius in feet and tenths of a foot.
  • Page 36 Menu 11 – Auxiliary Head This screen allows entry of auxiliary head dimensions, weights and CG. TEST 1. Press the 11 Auxiliary Head button. Press the Edit button to enter the dimensions screen. This screen allows the four displayed options to be entered or modified. TEST After entering the first dimension, press the Exit button to move to the next dimension, until all four items have dimensions.
  • Page 37 Menu 13 – Digital Inputs This menu is used to view digital inputs and outputs from functions like Anti-Two-Block and swing switches. 1. Press the 13 Digital Inputs button will show the computer digital inputs as they are utilized. TEST Menu 14 –...
  • Page 38 Menu 16 – Data Retrieval This menu will display the boom cylinder pressure in PSI, and the piston and rodside temperature in degrees Celsius. Press the No button to for access to reading and editing the Radius Moment Data and Fly Data.

  • Page 39: Appendix A - Measurement Record

    Appendix A - Measurement Record Use the space provided below to enter the necessary dimensions. Enter the dimensions in feet and tenths of a foot. Callout Description Measurement Boom Pivot Dimensions The horizontal distance between the center of the boom pivot and the center of the boom hoist cylinder upper pivot.
  • Page 40 Boom Hoist Cylinder Dimensions The distance measured around the outside of the cylinder rod, divided by 12. Number of cylinders Span Dimensions The dimension between the center of the boom pivot and the center of the sheave with the boom fully extended.
  • Page 41 Load Verification Test Displayed Displayed Displayed Measured Radius Displayed Actual Load Length Angle Radius Radius Error Load Load Error W450769A 01/14...

  • Page 42: Fraction-To-Decimal Conversion Chart

    Fraction-to-Decimal Conversion Chart Fraction Decimal Fraction Decimal 1/64 .015625 33/64 .515625 1/32 .03125 17/32 .53125 3/64 .046875 35/64 .546875 1/16 .0625 9/16 .5625 5/64 .078125 37/64 .578125 3/32 .09375 19/32 .59375 7/64 .109375 39/64 .609375 .125 .625 9/64 .140625 41/64 .640625 5/32 .15625...

  • Page 43: Chapter 3 - Troubleshooting

    Chapter 3 - Troubleshooting Introduction The Greer Company is dedicated to the design and manufacture of electronic parts created as operational aids to crane operators and associated personnel. The following manual has been developed to assist service personnel in understanding, locating, and identifying problems during the operation of the MicroGuard®...

  • Page 44: Calibration Menus

    3.1 Calibration Menus This Troubleshooting Manual for the MicroGuard® RCI-510 Rated Capacity Limiter System provides information and methods for isolating problems that may occur during operation of the System. Some of these problems can be corrected in the field. Other problems may require replacement of parts or the return of a part to the factory for servicing.

  • Page 45: System Self-Test

    3.2 System Self-Test The system will perform a Self-Test when the power is turned on or when the TEST button is pressed during operation. This will verify the computer, display console, cables, and all remote sensors are working properly. During the Self-Test all display functions are activated, allowing the operator to ensure all display indicators are functional.

  • Page 46: Display Console Problems

    3.2.1 Display Console Problems Display Console Problems are difficult to isolate because of the interaction between the display console and the computer unit. Failure of either unit, or interconnection of the two units, will cause a malfunction of the display console indications. No “FAULT” diagnoses of other system problems can be carried out without the proper function of the display console and it’s communication with the computer unit.

  • Page 47: Group "A" Fault Codes

    3.3.1 Group “A” Fault Codes Group “A” fault codes represent faults detected for analog sensors. NOTE: Check and repair “B” and “C” group faults before proceeding with group “A” fault finding sensors. The following chart details all the available codes in the left column and the actions to take in the right column.

  • Page 48: Group "B" Fault Codes

    3.3.2 Group “B” Fault Codes Group “B” fault codes represent faults detected for internal analog functions and power feeds to the function kickout and anti-two block switches. The following chart details all of the available codes in the left column and the actions to take in the right column.

  • Page 49: Group "C" Fault Codes

    3.3.3 Group “C” Fault Codes Group “C” fault codes represent faults detected for internal computer memories. The following chart details all the available codes in the left column and the actions to take in the right column. FAULT SERIAL DUTY PROGRAM ACTION CODE...

  • Page 50: Group "D" Fault Codes

    3.3.4 Group “D” Fault Codes Group “D” fault codes represent faults detected for capacity chart selection. The following chart details all the available codes in the left column and the actions to take in the right column. WRONG WRONG CHART FAULT SWING BOOM...

  • Page 51: No Fault Code" Problems

    3.4 “No Fault Code” Problems This section addresses problems not reported by the computer fault code system. 3.4.1 Anti-Two-Block Alarm (ATB) This section gives direction to fault diagnosis of ATB alarm problems. For detailed information, schematic, and voltages, refer to SECTION 3.9 - ANTI-TWO-BLOCK FUNCTION OVERVIEW. PROBLEM: •...

  • Page 52: Displayed Load Or Radius Errors

    3.4.2 Displayed Load or Radius Errors This section gives direction to fault diagnosis of load and radius errors. Load or radius errors can cause early or late tripping of overload alarms. Accuracy of load, radius, length, and angle is determined by the correct installation and maintenance of the system sensors.
  • Page 53 3. Raise the boom to a high angle (at least 70°) and measure the angle with the inclinometer. Ensure the displayed angle matches the inclinometer reading within 0.2°. If the displayed angle is incorrect, refer to SECTION 3.10.4 SPAN CALIBRATION. 3.4.2.3 Check Pressure Sensors The Pressure sensors are calibrated during production.

  • Page 54: Computer Unit Overview

    3.5 Computer Unit Overview The Computer Unit is the center of the System. It reads the sensors, controls computations and disconnect functions, and communicates with the display console/internal bar graph. The computer unit connects to the crane wiring harness via 60-way bulkhead connector. There are no wiring connections or screw terminals within the unit.

  • Page 55: Function Kickout Fuse

    3.5.3 Function Kickout Fuse (Fus1) The computer unit contains a standard 10 AMP replaceable fuse. The fuse protects the function kickout circuit and relay contacts, if a short circuit occurs across the crane kickout solenoids. Replace the fuse if the system error codes indicate that the function kickout power feed is missing. Ensure the crane circuit breaker is closed and power from the crane is present.

  • Page 56: Replacing The Computer Unit

    3.5.5 Replacing the Computer Unit Computer Removal 1. Lower the boom until the boom hoist cylinder is completely retracted and on its stop or the boom is firmly in the boom rest. 2. Disconnect the hydraulic connections at the computer unit. 3.

  • Page 57: Connectors

    3.6.3 Connectors A Single Circular Connector, common to all display models, is positioned on the rear of the display console. For bracket-mounted applications, it is clearly visible on the rear of the housing. On flush- mounted versions, it is “hidden” behind the panel, within the dash assembly. This connector carries power and signals from the computer unit to the display console.

  • Page 58: Reeling Drum Overview

    3.7 Reeling Drum Overview The primary operation of the Reeling Drum is to measure the extension of the telescoping sections of the main boom. The Reeling Drum includes an angle sensor to measure the main boom angle, and an electrical slip-ring which transfers the Anti-Two-Block signal from the reel-off cable to the system computer.

  • Page 59: Checking The Reeling Drum Cable Layering

    3.7.1 Checking the Reeling Drum Cable Layering The Reeling Drum is designed to provide accurate measurement of boom extension. To provide accurate measurement, the Reeling Drum cable must form a single flat layer across the surface of the Reeling Drum as the boom is telescoped in and out. Any stacking of the cable will cause extension errors as the boom retracts.

  • Page 60: Checking The Extension Sensor Drive Voltage

    3.7.2 Checking the Extension Sensor Drive Voltage 1. Remove the Reeling Drum cover. 2. Use a digital voltmeter to measure the voltage between the RED (TB1-4) and BLUE (TB1-1) wires at the terminal block mounted on the sensor baseplate assembly. 3.

  • Page 61: Physical Zero

    3.7.4 Physical Zero Ensure the extension sensor potentiometer is correctly set to its minimum Zero setting when the boom is fully retracted. This ensures the sensor will correctly measure over the full telescoping range of the boom. 1. Fully retract the boom. 2.

  • Page 62: Checking The Angle Sensor Pendulum

    3.7.5 Checking the Angle Sensor Pendulum The Angle Sensor uses a copper pendulum, mounted behind the sensor assembly. In order to control the pendulum during movements of the boom, two magnets provide damping. If problems with the angle sensor are suspected, ensure the pendulum and potentiometer are operating without restriction. Then continue to check electrical operation before performing any calibration.

  • Page 63: Checking The Angle Sensor Drive Voltage

    3.7.6 Checking the Angle Sensor Drive Voltage 1. Remove the Reeling Drum cover. 2. Use a digital voltmeter to measure the voltage between the red (TB1-4) and blue (TB1-1) wires at the terminal block mounted on the sensor baseplate assembly. 3.

  • Page 64: Reeling Drum Cable

    3.7.9 Reeling Drum Cable The Reeling Drum Cable carries the Anti-Two-Block signal from the switches at the main boom head, aux head and erected jib/fly. The cable is made from stainless steel wire and a durable outer sheath. Damage to the cable can cause intermittent Anti-Two-Block signals or bad measurement of boom extension.
  • Page 65 3.7.9.2 Installing the Reeling Drum Cable 1. Loosen the strain relief on the cheekplate and feed the Reeling Drum cable through the wall of the cheekplate. Leave enough slack to work easily with the cable. 2. If not already stripped, remove 1” of the outer jacket of the cable with an X-ACTO knife. 3.

  • Page 66: Slip-Ring Assembly

    3.7.10 Slip-Ring Assembly The main purpose of the Slip-Ring Assembly is to provide an electrical path for the feed and switch signal return, between the Anti-Two-Block switch and the system computer. If replacement becomes necessary, replace the upper and lower halves of the slip-ring assembly at the same time. Failure of the slip-ring assembly will most likely result in a continuous Anti-Two-Block alarm.
  • Page 67 3.7.10.2 Installing the Slip-Ring Assembly 1. The new Slip-Ring Assembly is pre-lubricated with grease. Do not wipe off lubrication. 2. Attach the brown slip-ring wire from the lower half of the new slip-ring to TB1-5 on the sensor baseplate assembly. Ensure the brown signal wire is also correctly connected. 3.

  • Page 68: Sensor Baseplate Assembly

    3.7.11 Sensor Baseplate Assembly The Sensor Baseplate Assembly supports both the extension and angle sensors and connects the sensors, the Two-Block switch signal to the slip-ring, and the signal cable to the system computer. Electrical or mechanical failure of either the angle sensor or the extension sensor potentiometers may not be field-repaired.

  • Page 69: Signal Cable Assembly

    3.7.11.1 Removing the Sensor Baseplate Assembly 1. Remove the aluminum cover on the Reeling Drum. 2. Remove the screws holding the slip-ring to the mounting ring of the Sensor Baseplate Assembly. 3. Disconnect the brown and black wires. 4. Disconnect the signal cable wires to terminal block TB1. 5.
  • Page 70 3.7.12.2 Removing the Signal Cable from the Reeling Drum 1. Remove the cover from the Reeling Drum. 2. Remove the slip-ring on the baseplate of the sensor assembly. 3. Disconnect all wires from the sensor assembly except for the 6 wires leading to the angle and extension sensor potentiometers.

  • Page 71: Anti-Two-Block Function Overview

    3.8 Anti-Two-Block Function Overview This section describes fault diagnoses of the Anti-Two-Block detection circuit. The computer supplies a protected positive feed to the Anti-Two-Block switches at the boom/jib head via the Reeling Drum Signal Cable, slip-ring, and Reeling Drum cable. With the Anti-Two-Block weight hanging freely on the switch(es), the switch contact is closed and the signal return to the computer is high (6.25 volts).

  • Page 72: Checking The Reeling Drum Cable

    3.8.1 Checking the Reeling Drum Cable The outer braid of the cable carries the Anti-Two-Block feed to the switches. If the cable sheath is damaged, this may cause a short circuit to the boom/chassis and indicate a fault code above “B 8”(See SECTION 3.3.2 GROUP “B”...

  • Page 73: Swing Sensor Overview

    3.9 Swing Sensor Overview The Swing Sensor measures the angle of the upper structure of the crane relative to its carrier. This angle is used to select capacity charts and operator swing alarms/working area alarms. If the swing sensor fails, the computer will be unable to select a valid capacity chart. If this occurs, use the Cancel Alarm Button to lower the load to the ground.

  • Page 74: Checking The Swing Sensor Drive Voltage

    3.9.1 Checking the Swing Sensor Drive Voltage 1. Remove the collector ring cover to expose the swing sensor. 2. With the system power turned on, measure the voltage between Terminal 1 of the swing sensor and crane ground. The voltage should be between 4.4 and 4.8 volts. 3.
  • Page 75 The swing sensor is located in the collector ring assembly under the hydraulic swivel. The job of the potentiometer is to track the movement of the upper half of the crane all the way around the swing circle. This function can only be zeroed in the stowed, or house lock positions, and the numbers should count up, when rotating to the right or in a clockwise direction.
  • Page 76 Greer Company is a part of TWG. As a leader in product innovation, Greer Company is committed to the ongoing improvement of its equipment. We reserve the right to make changes to our products without notice. ©2013 TWG. All rights reserved.

Table of Contents

Save PDF