D Slater
08-11-2007 17:50:30
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Re: Heres a picture in reply to georgeky, 08-11-2007 09:02:22
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George, can't say for sure if some of the late SMD used the MTA type bolster or not. Although nothing shows it was used on SMD,its possible some did because IH started selling in 1954 the MTA type bolster 9131-DD as a service or replacement part for 9131-DC and lower suffix use on MD and SMD. Except for outword apearance the MD,SMD,SMTA,SMTAD,400,400D and 450,450D are the same size on the placement of vertical steering shaft and radiator mount placement. Compared to a M or SM gas bolster the diesel M,SM or gas and diesel bolsters on MTA,400,450 put the ratiator and vertical steering shaft around a inch and a half farther away from front of engine or farther forward on tractor than the M or SM gas. Thats why the hoods are longer on MD,SMD and SMTA,SMTAD than M, SM gas and why I don't think a MTA type bolster was ever put on gas SM tractors. If they did the hood,steering worm shaft,radiator shroud and hose connections would of changed to MTA size also and no information shows that. Also the last SM gas made was at TN. redpower round up and it didn't have a MTA type bolster. Some wheel base numbers published are off, but if you look at correct wheelbase lengths and compare the same type fronts (narrow or other) I think you will find MD and SMD shows a wheelbase 1 1/2 inch longer or close than what a M or SM gas shows. MTA up is the same gas or diesel. Lots of people mistakenly think the reason a MTA hood is longer is because of the longer T/A housing but its all because of the front bolster. Rear gas tank mount is shifted forward to make up T/A housing length. If you get a chance look at where the frame rail bolt holes on bolster are located on a MD compared to a M. On a MD the rear 2 bolts will be located in bosses at exstream rear of bolster, on M the bolt holes are farther forward on side of bolster.
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