Chapter 3 Maintenance and Repair

3.1 Safety protection measures during maintenance and repair:

a) During maintenance and repair, precautions should be taken so that escalators cannot be started without the consent of the person performing such work.

b) Escalators should be regularly maintained and repaired by competent personnel.

3.2 Before maintenance and repair, the following things should be prepared

first:

a) Set up an enclosure and notes with the inscription “Routine Repair, No Access”

b) Turn the main switch off and lock it.

c) Inspection switch boxes shall be connected with the electrical controller in both driving and return stations in an escalator.

3.3 The following regulations should be complied with during maintenance and

repair:

a) Only the inspection switch boxes should be used during test operations. At the same time, the inspection plugs should be put into the inspection outlets of the controller in either of driving and return stations. Pull the inspection plugs out after inspection.

b) Do not start an escalator with a load.

c) Before entering into an escalator for maintenance and repair, the emergency stop button on the inspection switch boxes or in either of driving and return stations should keep in operation.

d) Avoid the risk of getting an electric shock when repairing the system with the higher voltage than safety.

e) Record the abnormal phenomena.

3.4 Period of maintenance and repair

3.4.1 Periodical maintenance and repair are vital to prevent an escalator to be damaged and to extend the length of its life.

3.4.2 The key factors determining the period of maintenance and repair as follows:

a) Running conditions (indoor, outdoor or outdoor with a roof)

b) Running time per week

c) Frequency of operations

3.4.3 Three types of maintenance and repair:

a) Daily: Include maintaining appearance, sanitation and lubrication of an escalator.

b) Light: include inspecting main function, basic cleaning work and lubrication.

c) Heavy: include inspecting all function, all equipments and doing some cleaning and lubrication work relevant to the running performance.

3.4.4 The too long period of maintenance and repair will influence an escalator to operate safely.

a) If the total running time is less than 80 hours per week, an escalator needs the maintenance and repair 4 times annually, including 2 light and 2 heavy.

b) If the total running time is up to 80 hours but less than 120 hours per week, an escalator needs the maintenance and repair 6 times annually, including 4 light and 2 heavy.

c) If the total running time is more than 120 hours per week, an escalator needs the maintenance and repair 8 times, including 4 light and 4 heavy.

3.4.5 First maintenance and repair.

If the total running time is more than 250 hours after a new escalator is put in operation, it

needs the first maintenance and repair. And the first maintenance and repair comprises: lubricating all chains completely, cleaning the machine room, fastening the bolts and adjusting the tension of handrails.

Date: 2015-01-11; view: 710