Document No:
Chapter –4 System of Maintenance
Version No: 1.0-d0
Date Issued: dd/mm/yyyy
Document Title: MANUAL MAINTENANCE FOR DIESEL LOCOMOTIVES
Revised 2013
Printed: 2015/03/08
Page 92 of 303
leads to a temperature rise. Thermal imaging devices can also be used for
monitoring and recording temperature rise data.
4.5.3.5 Average consumption: If consumption of lubricant /coolant / consumables e.g.
RR 606, coolant water, suspension bearing oil, battery water, gear case oil,
compressor lube oil, carbon brush & governor oil is found to be more than
previous trip or average consumption, then that component is showing signs of
leakage or deterioration. No topping up of oil / coolant / water should be done
till reasons for excessive consumption are identified and remedial action taken.
Routine filling without necessary repair is a primary cause of subsequent loco
failure. Shed should chalk out permissible day/ monthly consumption limit of
various lubricants and coolants.
4.6 Unit Exchange: Unit exchange method of overhauling/repairs shall be followed in the
Diesel Sheds, as explained below:-
Subject unit/assembly/sub-assembly is removed from the loco and replaced by a Unit/
Assembly/Sub assembly duly overhauled/in good order, kept ready in respective ready
spare pool. The removed unit is then overhauled/ repaired, tested and made part of ready
spare pool. List of items to be kept as unit exchange spares, along-with yardsticks, for both
Alco and HHP locos is shown at
Annexures-4.1 (a) and 4.1(b), respectively.
4.7 Home Sheds and Trouble Shooting Points: Since diesel locos are costly assets and also
lend themselves to extensive operation with a fairly large amount of flexibility, they cannot
always be brought back, nor insisted upon to be brought back, to the home shed very
frequently for attention. The maintenance work may, therefore, be decentralized to a certain
extent to meet the requirements of operation in each area. The decentralization shall be on
the following lines:-
4.7.1 Trouble shooting/outstation points: With the increase in periodicity of
maintenance schedule of locos, it has become imperative to carry out close
monitoring of locos on line. Hence, the trouble shooting/outstation points need to be
proliferated. These may be located at selected Marshalling Yards/Fuelling points or
crew changing points. They shall be suitably manned and supervised by a
competent supervisor and will attend to any minor repairs that might develop in
between schedules. This will avoid working the locos dead all the way to home
shed for attention.
4.7.1.1 Staff provided at such trouble shooting points shall comprise of a Section
Engineer/Junior Engineer along-with the diesel and electrical technicians and
khalasis in each shift. Strength of staff may, however, be increased or
decreased, if local conditions so warrant.
4.7.2 Diesel Loco Service Centre (DLSC): Operation of Diesel Loco Service Centre
shall be done as per instructions issued vide Rly.Bd’s letter no. 2003/M(L)/466/20
dated 01.07.2010.
4.7.3 Home Sheds: All schedule maintenance, except trip for Alco and 30/60 days for
HHP locos, will be undertaken at home sheds, barring POH. The facilities, spares
and staff required shall be as indicated at paras 4.8.2, 4.8.3 & 4.8.4.
Draft