Traction Rolling Stock - Indian Railways Institute of Electrical ...

Section E4
Carry out following:
a) Check foundation bolts of DJ.
b) Check carbon brushes and commutator of speedometer and transmitter.
c) Check time lag, operation and contacts of circuit breaker tripping relay, circuit
breaker resetting relay, slipping devices, time delay relay and signaling relays.
d) Check in detail Q50, Q45 and QCVAR.
e) Clean and lubricate earthing switch (HOM)
f) Check functioning of airflow relays.
g) Check surge arrestors ET1 and ET2 for flash marks,, clean arcing Horns.
8.8 FOUR MONTHLY INSPECTION (IC)
These items are in addition to those covered under IA and IB.
Section M1
Carry out the following:
a) Replace axle box liners when the clearance between axle box and bogie pedestal
exceed the limits prescribed. Record clearances.
b) Check that the equalizer pin is 'free' and condition of wear liners.
c) Traction motor axle suspension bearing; Check axle cap bolts for tightness.
Examine sample of the oil drawn from the bottom of the sump for presence of
water, dirt or other contaminants by blotter spot test.
Section M3
Carry out the following:
a) Check level of pantograph pan with spirit level and adjust if necessary; check the
pantograph pressure, overhaul servo motor and check spring pressure.
b) Check the roof bus bars.
Section M5
Carry out the following:
a) Overhaul Independent air brake valve and automatic air brake valves SA9, DAB,
A9, DVB, MPF. Check for correct setting and operation.
b) Clean the filters, check gaskets and replace if necessary.