Page 358 - IRSEM_Main Book

14.3.2 Maintenance of Electric Lifting Barrier (ELB)

(a) Machines must be kept in good condition, free from rust, dust and dirt.

(b) The bearing surface and moving parts of the electric lifting barrier shall be
lubricated properly.

(c) Contacts must be kept clean and in proper adjustment. If contact surfaces
are pitted, they must be replaced.

(d) Commutator and Brushes

(i) Commutator must be clean, smooth and have a bright appearance.

(ii) Brushes must be kept clean and properly bedded on the commutator.
Brushes should have proper pressure and should be free in brush
holders.

(e) Friction clutch must be so adjusted that the same should get de-clutched
when the boom is raised or lowered fully and the power supply is not cut
off.

(f) The shock absorber at the boom rest (stop post) must be kept properly
adjusted.

(g) The time of operation of electric lifting barrier shall not exceed stipulated
time. Measured value of current should not exceed rated values.

(h) The satisfactory functioning of the lifting barrier by a hand crank shall be
checked.

(i) All gate locking apparatus must be examined regularly and working parts
kept oiled. Gate locks must be kept in good working order.

(j) Proper working of audio/visual warning shall be ensured.

(k) Approach warning arrangement where provided, is working satisfactorily
and effectiveness of Approach and Back locking provided shall be ensured.

(l) Track circuits/Axle counters, if provided, shall be maintained in accordance
with instructions laid down in Chapter 17 of SEM.

(m) Communication of approved type, provided between Level Crossing gates
and the adjoining stations shall be checked in regard to their satisfactory
functioning.

(n) Heavy repairs, renewals or alterations to gate interlocking must not be
carried out until Jr. Engineer/Sr. Section Engineer (Signal) concerned has
arranged for the protection of the road traffic by the concerned department
and the work shall be carried out under proper disconnection.

Chapter 14: LC Gates Page 309 of 535