Project Description

The BTS Tech™ team of crane repair technicians take great pride in being some of the world’s most knowledgeable and effective crane repair technicians. With over 35 years of crane industry experience we provide expert crane repair, refurbishment, calibration, and parts services for the crane rental, rigging, construction, and refinery industries.  Contact us toll free in the US at 855.BODE.TEC or internationally at +1.303.433.8878

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We were very pleased to help our customer with his Liebherr LTM1160 repair after it had been sitting for two years.  Numerous rewiring issues and issues with the Liebherr Digi-Pal system were addressed.

Highlight of Troubleshooting Items:

  • The crane hoist speed was checked and found erratic and too fast for hoist down. We adjusted the Digi-Pal electronic cards to achieve the correct proportional output signals to the valves and also provided a general fine tune of all other hoist related cards.
  • The crane boom hoist function (boom up and boom down) was tested and the adjustment of the related Digi-Pal cards was checked. We adjusted the Digi-Pal card for the lowering brake proportional output signal to obtain a smooth boom down operation.
  • Due to high load indication, we tested the pressure transducer signals and found the zero value out of allowable tolerance and not adjustable anymore. The pressure transducer was changed and the crane was tested with a test load.
  • The boom unlock and lock lights for telescope section T1 failed to operate correctly. We found both locking pins not moving freely and enough to unlock. Both pinning devices (air-motors) were removed in order to remove pins for rework. The pins were cleaned, reworked, greased and were moveable by hand as specified.
  • During installation of the old pinning devices (air-motors), we noticed that those devices became weak over time and did not have enough stroke to fully unlock the boom pins. New pinning devices were ordered and installed on this Liebherr LTM1160 repair.
  • We found one boom lock limit switch defective at one pinning device. The switch was replaced and the boom lock and unlock system tested.
  • Boom length indication and boom percentage indication was tested and found only offset for telescope T2. Digi-Pal card was adjusted to fine tune the indication and output signal to the LMI.
  • Due to poor connection at the percentage meter in the dash board we re-wired the percentage meter to avoid future shortages.
  • Load Moment Indicator functions and indications were tested in all possible boom length % combinations.

 

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