Lift Maintenance

Posted by on September 21, 2014 in Heavy Equipment | 0 comments

Regularly maintaining your lift is the key to reliable service. Planned preventative maintenance quickly diagnoses potential problems reducing the amount of time your lift is out of action. The purpose of having a planned maintenance schedule is to ensure a systematic check of the whole lift is completed. Dependant on your maintenance contract, the schedule and frequencies of checks will change but you should expect the following by the service engineer on every visit you receive.

  • Run the lift checking how it starts and stops at each floor.
  • Check operation of all (doors or gates) and test any reversal device fitted.
  • Check all alarms or auto dialler’s for correct operation.
  • Lubricate guides and running gear if required.
  • Check oil levels.
  • Then complete the scheduled checks required in that planned visit.
  • Report any items requiring attention.

Your maintenance plan should include regular checks to the following areas:

  • Landing Doors
  • Shaft equipment
  • Floor Selector
  • Control Circuits
  • Driving Mechanisms
  • Brake unit
  • Main sheave
  • Secondary diverters
  • Over speed devices
  • Safety gear examination
  • Wiring
  • Safety devices
  • Ropes
  • Sundry Items

Lift wire ropes are made up of a number of strands (usually eight in the lift industry) which are twisted around core made of hemp fibres; this core keeps the ropes flexible. Each strand is in turn made up of 19 or more individual wires twisted together. These wires are made of special steel which combine lightness with strength. The chief factor in finally condemning a rope is the number of broken wires in a given length. However rusting, corrosion, excessive flattening of strands and the sudden stretching of a rope that has been in service for a while must also be considered. When ropes are reported as needing attention safety should be the main concern as they are one of the major components of a lift.

Sundry Items include items like Rope anchorages, Travelling cables, Indicators, Test units, Limit switches, Buffer switches.

Hydraulic Lifts

While the majority of lift equipment is similar to all types and makes of lifts, there are some differences which must be checked in the addition to the above when servicing a hydraulic lift.

  • Check that the low pressure switch operates correctly
  • Test and check emergency lowering device
  • Check the hyraulic oil level in the tank
  • Test that the re-levelling device works
  • Check all pipes for leaks
  • Check ram cylinder
  • Check ram seals for leaks
  • Check ram head

If all these items are checked on a regular basis you should notice an improved performance of your lift and reduced breakdowns.

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