Mobile Crane LMI Computer Replacement



Mobile Crane LMI Replacement
 $10,500 to $12,500
Simple to Use, Rugged Long Lasting, LMI Computer Replacement for Mobile Cranes
This mobile crane load moment indicator LMI computer replacement is perfectly suited to pre 2004 year telescopic cranes requiring a simple load monitoring solution with a single cable reel length angle sensor.  The RaycoWylie i4300 is the ideal replacement for aging PAT DS350 systems and will bring your machine up to date with a 4.3 inch full color display, state of the art reliable sensors, and rugged long lasting trouble-free construction.  The i4300 crane system supports multiple sensors including boom angle / length cable reel sensor, two load sensors, boom tip anti two block, and winds speed. Available for single reel telescopic cranes (hoist or total moment sensing) all sensors and the display itself are a minimum of IP67 water resistance rating.
  • Continuous display of Load, Hoist, Parts of line, Radius, boom length, boom angle and % of maximum capacity
  • Operator adjustable low, high angle, length, height and radius limits
  • Full lockout capabilities if installed on your crane
  • Audible and visual alarms indicating two-block, load limit conditions
  • Diagnostic menu and continuous error detection and recording
  • Quick and easy installation
  • USB file transfers
  • Multi-language: English, Spanish, French
  • Selectable units metric or US
Technical Data
  • Display Size 4.3 inch diagonal  3.66" x 7.80" x 1.65"
  • Screen Resolution 480 x 272
  • Operating Temperature -4 to 158 degrees Farenheit
  • Extended Temperature -40 to 158 degrees Farenheit
  • Supply Voltage 11 to 36 volts DC
  • Display Rating IP67
  • Accuracy Rating SAE J159
Recent Crane LMI Computer Projects
We have provided LMI computer replacement options and/or parts for hundreds of customers over the years.  Here are a few of the most recent complete LMI computer replacement system jobs.  Most of these jobs involve the replacement of an aging LMI system that has become unreliable however the crane itself is in great shape and continues to be used.  Some of our customers come to us without any LMI on their crane and we work with them to get a complete new system for them.
Grove TM1300
  • Full replacement of old PAT DS350 LMI
  • Load on both main line and auxiliary
  • Anti two block on both main and whipline
  • Full load chart programming
  • Retain full lockout capabilities
Project Overview
This customer was a large builder in the northwest focusing on large commercial facilities as well as custom build homes.  Their crane was in overall good condition as it had been well maintained and had conservative use in their construction projects.  The crane's old PAT DS350 LMI system however had deteriorated significantly and was giving constant E95 error codes (undetermined error).  We worked with this customer to find an LMI replacement system that was in their budget but with functionality on both main and auxiliary line and was rugged enough to withstand the northern winters and provide years of trouble free use.
Grove RT528C
  • Full replacement of old PAT DS350 GW
  • Load on main line
  • Anti Two Block on main line
  • Full load chart programming
  • Full lockout capabilities
Project Overview
This customer operates an excavation and construction company in the midwest providing highway and bridge construction services as well as support to the oil and gas pipeline industry.  This Grove crane was from the mid nineties however like many others, was in great shape and well cared for.  The computer system however was an old PAT DS350 GW system that had outlived its useful life.  This project was a simple swap out of the old system for the new.  The customer got full load carts and will have years of trouble free use of this crane computer system.
Shuttlelift CD5540F
  • New display with full load chart capabilities
  • Load pin on main line as sensor
  • Anti Two Block on main line
  • Mini cable reel for boom extention
  • Full lockout capabilities
Project Overview
This customer provides commercial and residential contracting services along the great lakes.  They had a Shuttlelift utilized for smaller projects and for work in their yard.  They wanted a compact option for the smaller crane.  We were able to work with them on a smaller system using a mini cable reel and load pin configuration.  The small unobtrusive system will give the years of safe use of this smaller crane.
Grove RT422
  • Full replacement of old PAT DS350 GW
  • Load on main line
  • Anti Two Block on main line
  • Full load chart programming
  • Full lockout capabilities
Project Overview
This customer provides steel erection as well as grain silo erection services in the midwest.  They had a well maintained Grove with a failing PAT DS350 computer.  This was another simple swap out for a new system.  The customer got full load charts and lockout capabilities and will have years of trouble free crane computer use.
Wiring Schematic for LMI Replacement
Mobile Crane LMI Computer
Individual component specification sheets
4.3" Full Color Display
Full Can-Bus I/O Computer Interface
Load Sensing Dynameter
Boom Length - Angle Cable Reel
About LMI Load Moment Indicators / Crane Computers
A Load Moment Indicator LMI system for mobile cranes operates on the principle of reference/real comparison. The real value, resulting from the pressure measurement and geometric sensors, is compared with the reference data stored in the central processor memory and is evaluated in he microprocessor. An analog indication of % capacity is displayed via the mobile crane operator’s console. When limits are reached, an overload warning signal is generated. At the same time, the crane movements that increase load moment such as hoist down, telescope out, and boom down will be locked out.  The fixed data regarding the crane, such as dimensional data, capacity charts, boom weights, and centers of gravity are stored in memory chips in the central processor unit. This data is the reference information used to calculate the operating conditions.  Boom length and boom angle are registered by the length/angle sensor, located inside the cable reel, mounted on the boom. The boom length is measured by the cable reel cable, which also serves as an electrical conductor for the anti-two- block switch.  The crane load is measured by pressure transducers attached to the piston and rod side of the lift cylinder.  Controls on the operator’s console allow the operator to select the operating mode (main boom, jib, etc.) as well as the parts of the line currently in use. The system will then limit operation to the capacities on the selected load chart, or the maximum permissible line pull in that configuration.  After the engine is started and the PTO is engaged, the LMI powers up and conducts an automatic test of the complete system.  After two successful system tests without errors, the system is ready for operation. In case of a system error, both the overload and anti-two-block lights on the central unit will illuminate.  The interactive user guidance considerably simplifies the input of operating modes as well as the setting of geometry limit values

The LMI is an operational aid that warns a mobile crane operator of approaching overload conditions and over hoist conditions that could cause damage to equipment and personnel.  The device is not, and shall not, be a substitute for good operator judgment, experience and use of accepted safe crane operating procedures.  The responsibility for the safe mobile crane operation shall remain with the crane operator who shall ensure that all warnings and instructions supplied are fully understood and observed.  Prior to operating the crane, the operator must carefully and thoroughly read and understand the information in this manual to ensure that he knows the operation and limitations of indicator and crane.  Proper functioning depends upon proper daily inspection and observance of the operating instructions set forth in the operators manual
A Long History in the LMI Crane Computer Industry
The founder of BTS has been in the LMI crane computer industry since 1984 as an engineer at PAT-CTI in England, then as a founding team member of PAT Hirschmann in Chambersburg PA, and later as an independent business owner specializing in complex service repairs on large Demag and Liebherr cranes.  BTS technicians have completed work all over the US, South America, Africa, and Europe.  Our customer base truly does span the entire globe
As experts in the crane LMI computer industry, BTS has often been asked to publish advice in Crane & Rigging Hot Line magazine
Wiring & Insulation Issues
Addressing two key issues of insulation and wire gauge on live wires in the crane computer LMI system.  Especially prone to neglect are wires and cables that run between the sensors and the main console / central unit computer.  Over years of weather exposure there can be significant deterioration that results in incorrect sensor readings and unreliable error code messages
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