Thinking about buying L5740HSTC: When does "-3" start?

[FatTire]

I'm playing around in my mind about selling my MX5100HST and looking for a low hour cabbed 5740. One issue is that I have the BH92 hoe and apparently only the -3 version of the cabbed L-series can accept the subframe and mount for the BH92. Is there a year or S/N that would signal the change to -3?

Are there any known issues with the 5740 I should watch out for? My MX5100 is essentially perfect and only 300 hours so it makes me slightly nervous to take on a machine whose history is unknown to me, but I keep thinking about the heated cab. If I can find a nice machine, I would still need to add the subframe, BH mount, and probably a remote or 2. I have 3 remotes on the MX and can't imagine living with less than that, or 2 rears and a 3rd function on the loader.

Thanks,
Dave

 

[TripleR]

See if this helps: http://www.tractorbynet.com/forums/...716-hst-1-vs-hst-3-a.html?highlight=L40+hst-3

 

[FatTire]

See if this helps: http://www.tractorbynet.com/forums/...716-hst-1-vs-hst-3-a.html?highlight=L40+hst-3

Thanks, that helps. The yellow knob for the PTO should be easy to determine, any seller would know if they have that or not.