Monday, September 26, 2016

Hauling Capacity of 3- Phase Locos

Hulage capaity in Tonees at different gradients and different speeds:




Saturday, July 23, 2016

Loco final inspections

Problem of defective CBC lock pin was observed in the outgoing locos.

This lock pin (trade item) does not have head-protrusion.

CEE(P&I) inspected roof of TP-44 alongwith CEE(Loco) and Shell production staff and  inspection staff.

Necessary instructions were given to inspection staff for checking the same.
Paint thickness measurement in the outgoing locos was also carried out by CEE(P&I).

In the out going loco,  air was leaking through TM blower.

Inspection staff was instructed to generate NC for same.

Problem of WAP5 gasket-roof was analysed in the shop today.

Fixture for drain channel. Calibration needs to be checked.
Camber for the roof arch is checked regularly as seen in the records.
Roof retaining hatch reportedly not provided between panto roof and converter roof.

It is also suspected that stacking of one roof over other ( WAP5 sheet is thinner than other locos) either in Shop#12 or in Shop # 16 might have deformed the profile which results in gap between roof and the gasket.


Drain Channel Panto roof.

During inspection of a loco in Bay#2 ,it was found that RSPS cowl was not having 2 bolts , which was due to  non-matching of holes.

Thursday, July 21, 2016

Whats latest in Indian Locomotives

Silent Engines:

Code of federal practice 49, Pt 229.121a limits noise inside loco cab to 85 Db.

In 3 Phase its < 85 Db at present but in Conventional its near or > 90 Db.

RDSO Modification sheet # 448 issued in this regard. 

Reliable Traction Motor Support :

RDSO Modification sheet # 447 Rev 0 issued in this regard. 

RDSO SMI No. 0269, Rev. 1

12 mm safety sling IS : 2266 Garde 1770.

1810 mm for TM 3 and 4

1510 mm long for TM 1, 2,5 and 6

Sling has D shackles on both sides. as per IS : 2415-2004 Grade 8

Standardisation of safety sling for compressors:

For 3 phase locos

RDSO SMI No. 0242, Rev. 1 issued.

8mm dia wire rope. as per IS 2762-2004 grade 1770

High reach panto: 

WBL -85

  • Can be fitted even in WAP4 ( due to DBR problem) with base as 1900 mm
  • Air bellow operated
  • Less no. of components.
  • fit for 200 kmph
  • Has Auto Droppping Device
  • Has over-reach detection device.
  • 2030 mm panto pan ( 230 mm extra )
Better CCB ( computerised control break ):

To prevent following failures:

  • Air leak from BPCB valve
  • Air leak from unloader valve
  • Breakage of AFI guage glass

To overcome:

  • Provide Wire Mesh Filter
  • Dirt collecter at CCB panel
  • BP pressure at ze
  • ro before attachment, 5 Kg after BP FP coupling.
  • Improving rubber seating quality by VITON
  • AFI glass thicness increasefrom 8 mm to 12 mm

Better bearing maintenance:

  • Follow FIFA strictly
  • Fix assembly component ij  kit form
  • Measuring radial clearance as per SMI-278
  • Induction heatng of seating of MSU bearing.
  • Adequate stock of TM and MSU bearing and grease.
  • Temp controller and demagnatising feature in induction heater.
  • Color matching of pinion as per SMI-278

Wednesday, July 20, 2016

Quality Inspection

Pantograph section was inspected  .


                                                       AM 12

Since Erode shed reported failure of MVMT, same was inspected in the shop.

MVMT( TM cooling blower motor) is trade item and inspected for correct direction of running, abnormal sound if any.

Failure was reported in Loco no 22877( WAP5 ) by Santaraganchi shed . Triplate copper pipe failure ( Stone India) was discussed in shop floor.

It was noted that TRIPLATE was a trade item, fitment of the copper pipes was done in shop only.


Quality Inspection

Stator of 3-phase motors were stacked without any cover. Production staff were instructed to cover for preventing dust ingress.

Modified inspection cover was inspected in Hitachi TM. It is part of RDSO (modification MS N0 0364).


Copper pipe failure as reported in the  loco # 22864 was analysed.

It was reported that copper pipes cracked while hot bending. Cold bending is not always possible. Although copper pipes have passed chemical tests in CLW lab, quality check must continue.