That is the crux of problem of comprehension you guys (blind hatred for DRDO, with no undestanding of the matter)have here at DFI.
You dont even read the link you post!!!!
As per the link the upgrade to fit the AC is being attempted. Russians neither helped us nor allowed DRDO to have a go at it. Now only russian opposition to DRDO fitting Ac on T-90 s resolved. Not the actual fitting of AC to T-90.
Read before you reply.
http://www.defproac.com/?p=982
" The weight was initially 58.5 T and may increase to approx 67 T with additional armour protection. Arjun project was conceived based on the matching requirement of the current western MBT’s and naturally, the weight will also match them.
However, the weight factor has not hampered the movement of various prototypes of Arjun during last 20 years, for trials/ training to various sectors, by both, rail and road, by existing means of transportation and no problems have been faced so far.
The feasibility report by the railways has also confirmed, the movement of Arjun loaded wagon as class ‘C’ ODC and the empty wagon as non-ODC. We need to look at the Arjun weight issue in a broader perspective as it is not a reflection of its agility and gradability. Being powered with a 1400 HP engine, its power /weight ratio is 21.0, and the Nominal Ground Pressure (NGP) of 0.95 kg/cm2 compares well with other MBTs of the world and the combination of low NGP and high power / weight ratio, its going ability is commendable. The comparative table highlights these aspects."
So it never faced any issues in logistics as far as indian railways is concerned even in its prototype period no special wagons were needed.
SO now we have a product that matches western MBts
http://ajaishukla.blogspot.in/2010/03/arjun-tank-outruns-outguns-russian-t-90.html
"we already have 70 ton capable Sarvantra bridging equippment"